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Proclivity ID
18811001
Unpublish
Citation Name
OBG Manag
Specialty Focus
Obstetrics
Gynecology
Surgery
Negative Keywords
gaming
gambling
compulsive behaviors
ammunition
assault rifle
black jack
Boko Haram
bondage
child abuse
cocaine
Daech
drug paraphernalia
explosion
gun
human trafficking
ISIL
ISIS
Islamic caliphate
Islamic state
mixed martial arts
MMA
molestation
national rifle association
NRA
nsfw
pedophile
pedophilia
poker
porn
pornography
psychedelic drug
recreational drug
sex slave rings
slot machine
terrorism
terrorist
Texas hold 'em
UFC
substance abuse
abuseed
abuseer
abusees
abuseing
abusely
abuses
aeolus
aeolused
aeoluser
aeoluses
aeolusing
aeolusly
aeoluss
ahole
aholeed
aholeer
aholees
aholeing
aholely
aholes
alcohol
alcoholed
alcoholer
alcoholes
alcoholing
alcoholly
alcohols
allman
allmaned
allmaner
allmanes
allmaning
allmanly
allmans
alted
altes
alting
altly
alts
analed
analer
anales
analing
anally
analprobe
analprobeed
analprobeer
analprobees
analprobeing
analprobely
analprobes
anals
anilingus
anilingused
anilinguser
anilinguses
anilingusing
anilingusly
anilinguss
anus
anused
anuser
anuses
anusing
anusly
anuss
areola
areolaed
areolaer
areolaes
areolaing
areolaly
areolas
areole
areoleed
areoleer
areolees
areoleing
areolely
areoles
arian
arianed
arianer
arianes
arianing
arianly
arians
aryan
aryaned
aryaner
aryanes
aryaning
aryanly
aryans
asiaed
asiaer
asiaes
asiaing
asialy
asias
ass
ass hole
ass lick
ass licked
ass licker
ass lickes
ass licking
ass lickly
ass licks
assbang
assbanged
assbangeded
assbangeder
assbangedes
assbangeding
assbangedly
assbangeds
assbanger
assbanges
assbanging
assbangly
assbangs
assbangsed
assbangser
assbangses
assbangsing
assbangsly
assbangss
assed
asser
asses
assesed
asseser
asseses
assesing
assesly
assess
assfuck
assfucked
assfucker
assfuckered
assfuckerer
assfuckeres
assfuckering
assfuckerly
assfuckers
assfuckes
assfucking
assfuckly
assfucks
asshat
asshated
asshater
asshates
asshating
asshatly
asshats
assholeed
assholeer
assholees
assholeing
assholely
assholes
assholesed
assholeser
assholeses
assholesing
assholesly
assholess
assing
assly
assmaster
assmastered
assmasterer
assmasteres
assmastering
assmasterly
assmasters
assmunch
assmunched
assmuncher
assmunches
assmunching
assmunchly
assmunchs
asss
asswipe
asswipeed
asswipeer
asswipees
asswipeing
asswipely
asswipes
asswipesed
asswipeser
asswipeses
asswipesing
asswipesly
asswipess
azz
azzed
azzer
azzes
azzing
azzly
azzs
babeed
babeer
babees
babeing
babely
babes
babesed
babeser
babeses
babesing
babesly
babess
ballsac
ballsaced
ballsacer
ballsaces
ballsacing
ballsack
ballsacked
ballsacker
ballsackes
ballsacking
ballsackly
ballsacks
ballsacly
ballsacs
ballsed
ballser
ballses
ballsing
ballsly
ballss
barf
barfed
barfer
barfes
barfing
barfly
barfs
bastard
bastarded
bastarder
bastardes
bastarding
bastardly
bastards
bastardsed
bastardser
bastardses
bastardsing
bastardsly
bastardss
bawdy
bawdyed
bawdyer
bawdyes
bawdying
bawdyly
bawdys
beaner
beanered
beanerer
beaneres
beanering
beanerly
beaners
beardedclam
beardedclamed
beardedclamer
beardedclames
beardedclaming
beardedclamly
beardedclams
beastiality
beastialityed
beastialityer
beastialityes
beastialitying
beastialityly
beastialitys
beatch
beatched
beatcher
beatches
beatching
beatchly
beatchs
beater
beatered
beaterer
beateres
beatering
beaterly
beaters
beered
beerer
beeres
beering
beerly
beeyotch
beeyotched
beeyotcher
beeyotches
beeyotching
beeyotchly
beeyotchs
beotch
beotched
beotcher
beotches
beotching
beotchly
beotchs
biatch
biatched
biatcher
biatches
biatching
biatchly
biatchs
big tits
big titsed
big titser
big titses
big titsing
big titsly
big titss
bigtits
bigtitsed
bigtitser
bigtitses
bigtitsing
bigtitsly
bigtitss
bimbo
bimboed
bimboer
bimboes
bimboing
bimboly
bimbos
bisexualed
bisexualer
bisexuales
bisexualing
bisexually
bisexuals
bitch
bitched
bitcheded
bitcheder
bitchedes
bitcheding
bitchedly
bitcheds
bitcher
bitches
bitchesed
bitcheser
bitcheses
bitchesing
bitchesly
bitchess
bitching
bitchly
bitchs
bitchy
bitchyed
bitchyer
bitchyes
bitchying
bitchyly
bitchys
bleached
bleacher
bleaches
bleaching
bleachly
bleachs
blow job
blow jobed
blow jober
blow jobes
blow jobing
blow jobly
blow jobs
blowed
blower
blowes
blowing
blowjob
blowjobed
blowjober
blowjobes
blowjobing
blowjobly
blowjobs
blowjobsed
blowjobser
blowjobses
blowjobsing
blowjobsly
blowjobss
blowly
blows
boink
boinked
boinker
boinkes
boinking
boinkly
boinks
bollock
bollocked
bollocker
bollockes
bollocking
bollockly
bollocks
bollocksed
bollockser
bollockses
bollocksing
bollocksly
bollockss
bollok
bolloked
bolloker
bollokes
bolloking
bollokly
bolloks
boner
bonered
bonerer
boneres
bonering
bonerly
boners
bonersed
bonerser
bonerses
bonersing
bonersly
bonerss
bong
bonged
bonger
bonges
bonging
bongly
bongs
boob
boobed
boober
boobes
boobies
boobiesed
boobieser
boobieses
boobiesing
boobiesly
boobiess
boobing
boobly
boobs
boobsed
boobser
boobses
boobsing
boobsly
boobss
booby
boobyed
boobyer
boobyes
boobying
boobyly
boobys
booger
boogered
boogerer
boogeres
boogering
boogerly
boogers
bookie
bookieed
bookieer
bookiees
bookieing
bookiely
bookies
bootee
booteeed
booteeer
booteees
booteeing
booteely
bootees
bootie
bootieed
bootieer
bootiees
bootieing
bootiely
booties
booty
bootyed
bootyer
bootyes
bootying
bootyly
bootys
boozeed
boozeer
boozees
boozeing
boozely
boozer
boozered
boozerer
boozeres
boozering
boozerly
boozers
boozes
boozy
boozyed
boozyer
boozyes
boozying
boozyly
boozys
bosomed
bosomer
bosomes
bosoming
bosomly
bosoms
bosomy
bosomyed
bosomyer
bosomyes
bosomying
bosomyly
bosomys
bugger
buggered
buggerer
buggeres
buggering
buggerly
buggers
bukkake
bukkakeed
bukkakeer
bukkakees
bukkakeing
bukkakely
bukkakes
bull shit
bull shited
bull shiter
bull shites
bull shiting
bull shitly
bull shits
bullshit
bullshited
bullshiter
bullshites
bullshiting
bullshitly
bullshits
bullshitsed
bullshitser
bullshitses
bullshitsing
bullshitsly
bullshitss
bullshitted
bullshitteded
bullshitteder
bullshittedes
bullshitteding
bullshittedly
bullshitteds
bullturds
bullturdsed
bullturdser
bullturdses
bullturdsing
bullturdsly
bullturdss
bung
bunged
bunger
bunges
bunging
bungly
bungs
busty
bustyed
bustyer
bustyes
bustying
bustyly
bustys
butt
butt fuck
butt fucked
butt fucker
butt fuckes
butt fucking
butt fuckly
butt fucks
butted
buttes
buttfuck
buttfucked
buttfucker
buttfuckered
buttfuckerer
buttfuckeres
buttfuckering
buttfuckerly
buttfuckers
buttfuckes
buttfucking
buttfuckly
buttfucks
butting
buttly
buttplug
buttpluged
buttpluger
buttpluges
buttpluging
buttplugly
buttplugs
butts
caca
cacaed
cacaer
cacaes
cacaing
cacaly
cacas
cahone
cahoneed
cahoneer
cahonees
cahoneing
cahonely
cahones
cameltoe
cameltoeed
cameltoeer
cameltoees
cameltoeing
cameltoely
cameltoes
carpetmuncher
carpetmunchered
carpetmuncherer
carpetmuncheres
carpetmunchering
carpetmuncherly
carpetmunchers
cawk
cawked
cawker
cawkes
cawking
cawkly
cawks
chinc
chinced
chincer
chinces
chincing
chincly
chincs
chincsed
chincser
chincses
chincsing
chincsly
chincss
chink
chinked
chinker
chinkes
chinking
chinkly
chinks
chode
chodeed
chodeer
chodees
chodeing
chodely
chodes
chodesed
chodeser
chodeses
chodesing
chodesly
chodess
clit
clited
cliter
clites
cliting
clitly
clitoris
clitorised
clitoriser
clitorises
clitorising
clitorisly
clitoriss
clitorus
clitorused
clitoruser
clitoruses
clitorusing
clitorusly
clitoruss
clits
clitsed
clitser
clitses
clitsing
clitsly
clitss
clitty
clittyed
clittyer
clittyes
clittying
clittyly
clittys
cocain
cocaine
cocained
cocaineed
cocaineer
cocainees
cocaineing
cocainely
cocainer
cocaines
cocaining
cocainly
cocains
cock
cock sucker
cock suckered
cock suckerer
cock suckeres
cock suckering
cock suckerly
cock suckers
cockblock
cockblocked
cockblocker
cockblockes
cockblocking
cockblockly
cockblocks
cocked
cocker
cockes
cockholster
cockholstered
cockholsterer
cockholsteres
cockholstering
cockholsterly
cockholsters
cocking
cockknocker
cockknockered
cockknockerer
cockknockeres
cockknockering
cockknockerly
cockknockers
cockly
cocks
cocksed
cockser
cockses
cocksing
cocksly
cocksmoker
cocksmokered
cocksmokerer
cocksmokeres
cocksmokering
cocksmokerly
cocksmokers
cockss
cocksucker
cocksuckered
cocksuckerer
cocksuckeres
cocksuckering
cocksuckerly
cocksuckers
coital
coitaled
coitaler
coitales
coitaling
coitally
coitals
commie
commieed
commieer
commiees
commieing
commiely
commies
condomed
condomer
condomes
condoming
condomly
condoms
coon
cooned
cooner
coones
cooning
coonly
coons
coonsed
coonser
coonses
coonsing
coonsly
coonss
corksucker
corksuckered
corksuckerer
corksuckeres
corksuckering
corksuckerly
corksuckers
cracked
crackwhore
crackwhoreed
crackwhoreer
crackwhorees
crackwhoreing
crackwhorely
crackwhores
crap
craped
craper
crapes
craping
craply
crappy
crappyed
crappyer
crappyes
crappying
crappyly
crappys
cum
cumed
cumer
cumes
cuming
cumly
cummin
cummined
cumminer
cummines
cumming
cumminged
cumminger
cumminges
cumminging
cummingly
cummings
cummining
cumminly
cummins
cums
cumshot
cumshoted
cumshoter
cumshotes
cumshoting
cumshotly
cumshots
cumshotsed
cumshotser
cumshotses
cumshotsing
cumshotsly
cumshotss
cumslut
cumsluted
cumsluter
cumslutes
cumsluting
cumslutly
cumsluts
cumstain
cumstained
cumstainer
cumstaines
cumstaining
cumstainly
cumstains
cunilingus
cunilingused
cunilinguser
cunilinguses
cunilingusing
cunilingusly
cunilinguss
cunnilingus
cunnilingused
cunnilinguser
cunnilinguses
cunnilingusing
cunnilingusly
cunnilinguss
cunny
cunnyed
cunnyer
cunnyes
cunnying
cunnyly
cunnys
cunt
cunted
cunter
cuntes
cuntface
cuntfaceed
cuntfaceer
cuntfacees
cuntfaceing
cuntfacely
cuntfaces
cunthunter
cunthuntered
cunthunterer
cunthunteres
cunthuntering
cunthunterly
cunthunters
cunting
cuntlick
cuntlicked
cuntlicker
cuntlickered
cuntlickerer
cuntlickeres
cuntlickering
cuntlickerly
cuntlickers
cuntlickes
cuntlicking
cuntlickly
cuntlicks
cuntly
cunts
cuntsed
cuntser
cuntses
cuntsing
cuntsly
cuntss
dago
dagoed
dagoer
dagoes
dagoing
dagoly
dagos
dagosed
dagoser
dagoses
dagosing
dagosly
dagoss
dammit
dammited
dammiter
dammites
dammiting
dammitly
dammits
damn
damned
damneded
damneder
damnedes
damneding
damnedly
damneds
damner
damnes
damning
damnit
damnited
damniter
damnites
damniting
damnitly
damnits
damnly
damns
dick
dickbag
dickbaged
dickbager
dickbages
dickbaging
dickbagly
dickbags
dickdipper
dickdippered
dickdipperer
dickdipperes
dickdippering
dickdipperly
dickdippers
dicked
dicker
dickes
dickface
dickfaceed
dickfaceer
dickfacees
dickfaceing
dickfacely
dickfaces
dickflipper
dickflippered
dickflipperer
dickflipperes
dickflippering
dickflipperly
dickflippers
dickhead
dickheaded
dickheader
dickheades
dickheading
dickheadly
dickheads
dickheadsed
dickheadser
dickheadses
dickheadsing
dickheadsly
dickheadss
dicking
dickish
dickished
dickisher
dickishes
dickishing
dickishly
dickishs
dickly
dickripper
dickrippered
dickripperer
dickripperes
dickrippering
dickripperly
dickrippers
dicks
dicksipper
dicksippered
dicksipperer
dicksipperes
dicksippering
dicksipperly
dicksippers
dickweed
dickweeded
dickweeder
dickweedes
dickweeding
dickweedly
dickweeds
dickwhipper
dickwhippered
dickwhipperer
dickwhipperes
dickwhippering
dickwhipperly
dickwhippers
dickzipper
dickzippered
dickzipperer
dickzipperes
dickzippering
dickzipperly
dickzippers
diddle
diddleed
diddleer
diddlees
diddleing
diddlely
diddles
dike
dikeed
dikeer
dikees
dikeing
dikely
dikes
dildo
dildoed
dildoer
dildoes
dildoing
dildoly
dildos
dildosed
dildoser
dildoses
dildosing
dildosly
dildoss
diligaf
diligafed
diligafer
diligafes
diligafing
diligafly
diligafs
dillweed
dillweeded
dillweeder
dillweedes
dillweeding
dillweedly
dillweeds
dimwit
dimwited
dimwiter
dimwites
dimwiting
dimwitly
dimwits
dingle
dingleed
dingleer
dinglees
dingleing
dinglely
dingles
dipship
dipshiped
dipshiper
dipshipes
dipshiping
dipshiply
dipships
dizzyed
dizzyer
dizzyes
dizzying
dizzyly
dizzys
doggiestyleed
doggiestyleer
doggiestylees
doggiestyleing
doggiestylely
doggiestyles
doggystyleed
doggystyleer
doggystylees
doggystyleing
doggystylely
doggystyles
dong
donged
donger
donges
donging
dongly
dongs
doofus
doofused
doofuser
doofuses
doofusing
doofusly
doofuss
doosh
dooshed
doosher
dooshes
dooshing
dooshly
dooshs
dopeyed
dopeyer
dopeyes
dopeying
dopeyly
dopeys
douchebag
douchebaged
douchebager
douchebages
douchebaging
douchebagly
douchebags
douchebagsed
douchebagser
douchebagses
douchebagsing
douchebagsly
douchebagss
doucheed
doucheer
douchees
doucheing
douchely
douches
douchey
doucheyed
doucheyer
doucheyes
doucheying
doucheyly
doucheys
drunk
drunked
drunker
drunkes
drunking
drunkly
drunks
dumass
dumassed
dumasser
dumasses
dumassing
dumassly
dumasss
dumbass
dumbassed
dumbasser
dumbasses
dumbassesed
dumbasseser
dumbasseses
dumbassesing
dumbassesly
dumbassess
dumbassing
dumbassly
dumbasss
dummy
dummyed
dummyer
dummyes
dummying
dummyly
dummys
dyke
dykeed
dykeer
dykees
dykeing
dykely
dykes
dykesed
dykeser
dykeses
dykesing
dykesly
dykess
erotic
eroticed
eroticer
erotices
eroticing
eroticly
erotics
extacy
extacyed
extacyer
extacyes
extacying
extacyly
extacys
extasy
extasyed
extasyer
extasyes
extasying
extasyly
extasys
fack
facked
facker
fackes
facking
fackly
facks
fag
faged
fager
fages
fagg
fagged
faggeded
faggeder
faggedes
faggeding
faggedly
faggeds
fagger
fagges
fagging
faggit
faggited
faggiter
faggites
faggiting
faggitly
faggits
faggly
faggot
faggoted
faggoter
faggotes
faggoting
faggotly
faggots
faggs
faging
fagly
fagot
fagoted
fagoter
fagotes
fagoting
fagotly
fagots
fags
fagsed
fagser
fagses
fagsing
fagsly
fagss
faig
faiged
faiger
faiges
faiging
faigly
faigs
faigt
faigted
faigter
faigtes
faigting
faigtly
faigts
fannybandit
fannybandited
fannybanditer
fannybandites
fannybanditing
fannybanditly
fannybandits
farted
farter
fartes
farting
fartknocker
fartknockered
fartknockerer
fartknockeres
fartknockering
fartknockerly
fartknockers
fartly
farts
felch
felched
felcher
felchered
felcherer
felcheres
felchering
felcherly
felchers
felches
felching
felchinged
felchinger
felchinges
felchinging
felchingly
felchings
felchly
felchs
fellate
fellateed
fellateer
fellatees
fellateing
fellately
fellates
fellatio
fellatioed
fellatioer
fellatioes
fellatioing
fellatioly
fellatios
feltch
feltched
feltcher
feltchered
feltcherer
feltcheres
feltchering
feltcherly
feltchers
feltches
feltching
feltchly
feltchs
feom
feomed
feomer
feomes
feoming
feomly
feoms
fisted
fisteded
fisteder
fistedes
fisteding
fistedly
fisteds
fisting
fistinged
fistinger
fistinges
fistinging
fistingly
fistings
fisty
fistyed
fistyer
fistyes
fistying
fistyly
fistys
floozy
floozyed
floozyer
floozyes
floozying
floozyly
floozys
foad
foaded
foader
foades
foading
foadly
foads
fondleed
fondleer
fondlees
fondleing
fondlely
fondles
foobar
foobared
foobarer
foobares
foobaring
foobarly
foobars
freex
freexed
freexer
freexes
freexing
freexly
freexs
frigg
frigga
friggaed
friggaer
friggaes
friggaing
friggaly
friggas
frigged
frigger
frigges
frigging
friggly
friggs
fubar
fubared
fubarer
fubares
fubaring
fubarly
fubars
fuck
fuckass
fuckassed
fuckasser
fuckasses
fuckassing
fuckassly
fuckasss
fucked
fuckeded
fuckeder
fuckedes
fuckeding
fuckedly
fuckeds
fucker
fuckered
fuckerer
fuckeres
fuckering
fuckerly
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Mifepristone for the treatment of miscarriage and fetal demise

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Sat, 11/05/2022 - 16:29

 

 

In the uterus, coordinated myometrial cell contraction is not triggered by neural activation; instead, myometrial cells work together as a contractile syncytium through cell-to-cell gap junction connections permitting the intercellular sharing of small molecules, which in turn facilitates activation of the actin-myosin contractile apparatus and coordinated uterine contraction. In myometrial cells, connexin 43 (Cx43) is the main gap junction protein. Cx43 permits the passage of small hydrophilic molecules (ATP) and ions (calcium) cell to cell. Estradiol increases Cx43 synthesis in human myometrial cells.1 Progesterone decreases Cx43 synthesis effectively isolating myometrial cells, reducing cell-to-cell sharing of chemicals that stimulate contraction, blocking coordinated uterine contraction.2 Progesterone suppression of Cx43 synthesis helps to prevent premature uterine contraction during pregnancy. At term, decreases in progesterone levels result in an increase in Cx43 synthesis, facilitating the onset of effective labor. In myometrial cells, antiprogestins, including mifepristone, increase the number of gap junction connections, facilitating a coordinated contractile signal in response to misoprostol or oxytocin.3,4

It takes time for antiprogestins to stimulate myometrial cell production of Cx43. In the rat myometrium the administration of mifepristone results in a 2.5-fold increase of Cx43 mRNA transcripts within 9 hours and a 5.6-fold increase in 24 hours.3 Hence, most mifepristone treatment protocols involve administering mifepristone and waiting 24 to 48 hours before administering an agent that stimulates myometrial contraction, such as misoprostol. Antiprogestins also increase the sensitivity of myometrial cells to oxytocin stimulation of uterine contractions by increasing Cx43 concentration.4

Progesterone also regulates other important biological processes in the cervix, decidua, placenta, and cervix. Antiprogestins can facilitate cervical ripening and disrupt decidual function, interfering with the attachment of pregnancy tissue.5 In the cervix, antiprogestins increase matrix metalloproteinase expression, disrupting collagen organization, decreasing cervical tensile strength and leading to cervical ripening.6

Pharmacology of mifepristone

Mifepristone is an antiprogestin and antiglucocorticoid with high-affinity binding to both the progesterone and glucocorticoid receptors (FIGURE 1). The phenylaminodimethyl group at C-11 of mifepristone changes the positional equilibrium of helix 12 of the progesterone receptor, reducing the ability of the receptor to bind required co-activators, limiting receptor binding to DNA, resulting in an antiprogesterone effect.7 At the low, single-dose used for treatment of miscarriage and fetal demise (200 mg one dose), mifepristone is an antiprogestin. At the high, daily dose used for the treatment of hyperglycemia caused by Cushing disease (≥ 300 mg daily), mifepristone is also an antiglucocorticoid.

FIGURE  The chemical structure of progesterone and the antiprogestin, mifepristone. When mifepristone binds to the progesterone receptor, the phenylaminodimethyl group at C-11 reduces the ability of the mifepristone-progesterone receptor complex to bind co-activators necessary for the initiation of DNA transcription, creating an antiprogestin effect.

Although mifepristone is a powerful antiglucocorticoid, in patients with an intact hypothalamic-pituitary-adrenal axis, mifepristone does not cause adrenal insufficiency. In people with an intact hypothalamic-pituitary-adrenal axis, daily administration of mifepristone (≥ 200 mg) for 7 days or longer results in an increase in pituitary secretion of ACTH and adrenal secretion of cortisol, largely overcoming the antiglucocorticoid action of mifepristone.8-10 This compensatory increase in ACTH and cortisol is not possible in patients who have had a hypophysectomy or bilateral adrenalectomy or have adrenal suppression due to long-term treatment with high doses of glucocorticoids. Mifepristone is contraindicated for patients with these conditions because it may cause glucocorticoid insufficiency by blocking glucocorticoid receptors.

The terminal half-life of mifepristone is 18 hours.11 Following oral administration of a single dose of mifepristone 200 mg the peak circulating concentration is reached in 90 minutes. Mifepristone is metabolized by CYP3A4 and is also a strong inhibitor of CYP3A4. Contraindications to the use of mifepristone include adrenal failure, porphyria, hemorrhagic diseases, anticoagulation, an IUD in the uterus, ectopic pregnancy, long-term glucocorticoid administration, and an undiagnosed adnexal mass.

Continue to: Mifepristone-misoprostol for the treatment of early missed miscarriage with a gestational sac...

 

 

Mifepristone-misoprostol for the treatment of early missed miscarriage with a gestational sac

For patients with a miscarriage, the treatment options to resolve the pregnancy loss are expectant management, medication, or surgery.12 Joint decision-making is recommended to establish a management plan that supports the patient’s values. Expectant management is most likely to result in a multi-week process to achieve completion of the miscarriage. A surgical procedure is most likely to result in rapid resolution of the miscarriage with the greatest rate of success. Surgical evacuation of the uterus may be the preferred option for patients who have excessive uterine bleeding or concerning vital signs. Both medical and surgical management are more likely than expectant management to successfully resolve the miscarriage.13

In the past, the standard approach to medication management of a miscarriage was the administration of one or more doses of misoprostol, a synthetic prostaglandin E1. However, two large trials have reported that the dual-medication sequence of mifepristone followed 24 to 48 hours later by misoprostol is more effective than misoprostol alone for resolving a miscarriage.14,15 This is probably due to mifepristone making the uterus more responsive to the effects of misoprostol.

Schreiber and colleagues14 reported a study of 300 patients with an anembryonic gestation or embryonic demise, between 5 and 12 completed weeks of gestation, who were randomly assigned to treatment with mifepristone (200 mg) followed in 24 to 48 hours with vaginal misoprostol (800 µg) or vaginal misoprostol (800 µg) alone. Ultrasonography was performed 1 to 4 days after misoprostol administration. Successful treatment was defined as expulsion of the gestational sac plus no additional surgical or medical intervention within 30 days after treatment. In this study, the dual-medication regimen of mifepristone-misoprostol was more successful than misoprostol alone in resolving the miscarriage, 84% and 67%, respectively (relative risk [RR], 1.25; 95% confidence interval [CI], 1.09–1.43).

Surgical evacuation of the uterus occurred less often with mifepristone-misoprostol treatment than with misoprostol monotherapy—9% and 24%, respectively (RR, 0.37; 95% CI, 0.21–0.68). Pelvic infection occurred in 2 patients (1.3%) in each group. Uterine bleeding managed with blood transfusion occurred in 3 patients who received mifepristone-misoprostol and 1 patient who received misoprostol alone. In this study, clinical factors including active bleeding, parity, and gestational age did not influence treatment success with the mifepristone-misoprostol regimen.16 The mifepristone-misoprostol regimen was reported to be more cost-effective than misoprostol alone.17

Chu and colleagues15 reported a study of medication treatment of missed miscarriage that included more than 700 patients randomly assigned to treatment with mifepristone-misoprostol or placebo-misoprostol. Missed miscarriage was diagnosed by an ultrasound demonstrating a gestational sac and a nonviable pregnancy. The doses of mifepristone and misoprostol were 200 mg and 800 µg, respectively. In this study the misoprostol was administered 48 hours following mifepristone or placebo using a vaginal, oral, or buccal route, but 90% of patients used the vaginal route. Treatment was considered successful if the patient passed the gestational sac as determined by an ultrasound performed 7 days after entry into the study. If the gestational sac was passed, the patients were asked to do a urine pregnancy test 3 weeks after entering the study to conclude their care episode. If patients did not pass the gestational sac, they were offered a second dose of misoprostol or surgical evacuation. In this study, mifepristone-misoprostol resulted in fewer patients who did not pass the gestational sac within 7 days after entry into the study than placebo (mifepristone-misoprostol, 17% vs placebo-misoprostol, 24% (P=.043). Surgical intervention was performed in 25% of patients treated with placebo-misoprostol and 17% of patients treated with mifepristone-misoprostol (RR, 0.73; 95% CI, 0.53–0.95; P=.021). A cost-effectiveness analysis of the trial results reported that the combination of mifepristone-misoprostol was less costly than misoprostol alone for the management of missed miscarriages.18

Misoprostol can be administered by an oral, buccal, rectal, or vaginal route.19,20 Vaginal administration results in higher circulating concentrations of misoprostol than buccal administration, but both routes of administration produce similar mean uterine tone and mean uterine activity as measured by an intrauterine pressure transducer over 5 hours.21 Hence, at our institution, we most often use buccal administration of misoprostol. To assess effectiveness of mifepristone-misoprostol treatment, 1 week after treatment with a pelvic ultrasound to detect expulsion of the gestational sac. Alternatively, a urine pregnancy test can be performed 3 weeks following medication treatment. The mifepristone-misoprostol regimen is not approved by the US Food and Drug Administration for the treatment of miscarriage.

Continue to: Mifepristone-misoprostol for the treatment of fetal demise...

 

 

Mifepristone-misoprostol for the treatment of fetal demise

Fetal loss in the second or third trimesters is a devastating experience for most patients, painfully echoing in the heart and mind for years. Empathic and effective treatment of fetal loss may reduce the adverse impact of the event. Multiple studies have reported that combinations of mifepristone and misoprostol reduced the time from initiation of labor contractions to birth compared with misoprostol alone.22-28 In addition, the combination of mifepristone-misoprostol reduced the amount of misoprostol needed to achieve delivery.22,23

In one clinical trial, 66 patients with fetal demise between 14 and 28 weeks’ gestation were randomized to receive mifepristone 200 mg or placebo.22 Twenty-four to 48 hours later, misoprostol for induction of labor was initiated. Among the patients from 14 to 23 completed weeks of gestation, the misoprostol dose was 400 µg vaginally every 6 hours. For patients from 24 to 28 weeks gestation, the misoprostol dose was 200 µg vaginally every 4 hours. The median times from initiation of misoprostol to birth for the patients in the mifepristone and placebo groups were 6.8 hours and 10.5 hours (P=.002).

Compared with the patients in the placebo-misoprostol group, the patients in the mifepristone-misoprostol group required fewer doses of misoprostol (2.1 vs 3.4; P=.002) and a lower total dose of misoprostol (768 µg vs 1,182 µg; P=.003). All patients in the mifepristone group delivered within 24 hours. By contrast, 13% of the patients in the placebo group delivered more than 24 hours after the initiation of misoprostol treatment. Five patients were readmitted with retained products of conception needing suction curettage—4 in the placebo group and 1 in the mifepristone group.22

In a second clinical trial, 110 patients with fetal demise after 20 weeks of gestation were randomized to receive mifepristone 200 mg or placebo.23 Thirty-six to 48 hours later, misoprostol for induction of labor was initiated. Among the patients from 20 to 25 completed weeks of gestation, the misoprostol dose was 100 µg vaginally every 6 hours for a maximum of 4 doses. For patients ≥26 weeks gestation, the misoprostol dose was 50 µg vaginally every 4 hours for a maximum of 6 doses. The median times from initiation of misoprostol to birth for the patients in the mifepristone and placebo groups were 9.8 hours and 16.3 hours. (P=.001).

Compared with the patients in the placebo-misoprostol group, the patients in the mifepristone-misoprostol group required a lower total dose of misoprostol (110 µg vs 198 µg, P<.001).

Delivery within 24 hours following initiation of misoprostol occurred in 93% and 73% of the patients in the mifepristone and placebo groups, respectively (P<.001). Compared with patients in the mifepristone group, shivering occurred more frequently among the patients in the placebo group (7.5% vs 19.2%; P=.09), likely because they received greater doses of misoprostol.23

Miscarriage and fetal demise frequently cause patients to experience a range of emotions including denial, numbness, grief, anger, guilt, and depression. It may take months or years for people to progress to a tentative acceptance of the loss, refocusing on future aspirations. Empathic care and timely and effective medical intervention to resolve the pregnancy loss optimize outcomes. For medication treatment of miscarriage and fetal demise, mifepristone is an important agent because it improves the success rate for resolution of miscarriage without surgery and it shortens the time of labor for inductions for fetal demise. Obstetrician-gynecologists are the specialists leading advances in treatment of miscarriage and fetal demise. I encourage you to use mifepristone in your care of appropriate patients with miscarriage and fetal demise. ●

References
  1. Andersen J, Grine E, Eng L, et al. Expression of connexin-43 in human myometrium and leiomyoma. Am J Obstet Gynecol. 1993;169:1266-1276. doi: 10.1016/0002-9378(93)90293-r.
  2. Ou CW, Orsino A, Lye SJ. Expression of connexin-43 and connexin-26 in the rat myometrium during pregnancy and labor is differentially regulated by mechanical and hormonal signals. Endocrinology. 1997;138:5398-5407. doi: 10.1210 /endo.138.12.5624.
  3. Petrocelli T, Lye SJ. Regulation of transcripts encoding the myometrial gap junction protein, connexin-43, by estrogen and progesterone. Endocrinology. 1993;133:284-290. doi: 10.1210 /endo.133.1.8391423.
  4. Chwalisz K, Fahrenholz F, Hackenberg M, et al. The progesterone antagonist onapristone increases the effectiveness of oxytocin to produce delivery without changing the myometrial oxytocin receptor concentration. Am J Obstet Gynecol. 1991;165:1760-1770. doi: 10.1016/0002 -9378(91)90030-u.
  5. Large MJ, DeMayo FJ. The regulation of embryo implantation and endometrial decidualization by progesterone receptor signaling. Mol Cell Endocrinol. 2012;358:155-165. doi: 10.1016 /j.mce.2011.07.027.
  6. Clark K, Ji H, Feltovich H, et al. Mifepristone-induced cervical ripening: structural, biomechanical and molecular events. Am J Obstet Gynecol. 2006;194:1391-1398. doi: 10.1016 /j.ajog.2005.11.026.
  7. Raaijmakers HCA, Versteegh JE, Uitdehaag JCM. T he x-ray structure of RU486 bound to the progesterone receptor in a destabilized agonist conformation. J Biol Chem. 2009;284:19572-19579. doi: 10.1074/jbc.M109.007872.
  8. Yuen KCJ, Moraitis A, Nguyen D. Evaluation of evidence of adrenal insufficiency in trials of normocortisolemic patients treated with mifepristone. J Endocr Soc. 2017;1:237-246. doi: 10.1210 /js.2016-1097.
  9. Spitz IM, Grunberg SM, Chabbert-Buffet N, et al. Management of patients receiving long-term treatment with mifepristone. Fertil Steril. 2005;84:1719-1726. doi: 10.1016 /j.fertnstert.2005.05.056.
  10. Bertagna X, Escourolle H, Pinquier JL, et al. Administration of RU 486 for 8 days in normal volunteers: antiglucocorticoid effect with no evidence of peripheral cortisol deprivation. J Clin Endocrinol Metab. 1994;78:375-380. doi: 10.1210 /jcem.78.2.8106625.
  11. Mifeprex [package insert]. New York, NY: Danco Laboratories; March 2016.
  12. Early pregnancy loss. ACOG Practice Bulletin No 200. American College of Obstetricians and Gynecologists. Obstet Gynecol. 2018;132:e197-e207. doi: /AOG.0000000000002899. 10.1097
  13. Chu J, Devall AJ, Hardy P, et al. What is the best method for managing early miscarriage? BMJ. 2020;368:l6483. doi: 10.1136/bmj.l6438.
  14. Schreiber C, Creinin MD, Atrio J, et al. Mifepristone pretreatment for the medical management of early pregnancy loss. N Engl J Med. 2018;378:2161-2170. doi: 10.1056 /NEJMoa1715726.
  15. Chu JJ, Devall AJ, Beeson LE, et al. Mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage (MifeMiso): a randomised, double-blind, placebo-controlled trial. Lancet. 2020;396:770-778. doi: 10.1016 /S0140-6736(20)31788-8.
  16. Sonalkar S, Koelper N, Creinin MD, et al. Management of early pregnancy loss with mifepristone and misoprostol: clinical predictors of treatment success from a randomized trial. Am J Obstet Gynecol. 2020;223:551.e1-e7. doi: 10.1016/j. ajog.2020.04.006. 17.
  17. Nagendra D, Koelper N, Loza-Avalos SE, et al. Cost-effectiveness of mifepristone pretreatment for the medical management of nonviable early pregnancy: secondary analysis of a randomized clinical trial. JAMA Netw Open. 2020;3:e201594. doi: 10.1001/jamanetworkopen.2020.1594.
  18. Okeke-Ogwulu CB, Williams EV, Chu JJ, et al. Cost-effectiveness of mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage: an economic evaluation based on the MifeMiso trial. BJOG. 2021;128: 1534-1545. doi: 10.1111/1471-0528.16737.
  19. Tang OS, Schweer H, Seyberth HW, et al. Pharmacokinetics of different routes of administration of misoprostol. Hum Reprod. 2002;17:332336. doi: 10.1093/humrep/17.2.332.
  20. Schaff EA, DiCenzo R, Fielding SL. Comparison of misoprostol plasma concentrations following buccal and sublingual administration. Contraception. 2005;71:22-25. doi: 10.1016 /j.contraception.2004.06.014.
  21. Meckstroth KR, Whitaker AK, Bertisch S, et al. Misoprostol administered by epithelial routes: drug absorption and uterine response. Obstet Gynecol. 2006;108:582-590. doi: 10.1097/01 .AOG.0000230398.32794.9d.
  22. Allanson ER, Copson S, Spilsbury K, et al. Pretreatment with mifepristone compared with misoprostol alone for delivery after fetal death between 14 and 28 weeks of gestation. Obstet Gynecol. 2021;137:801-809. doi: 10.1097 /AOG.0000000000004344.
  23. Chaudhuri P, Datta S. Mifepristone and misoprostol compared with misoprostol alone for induction of labor in intrauterine fetal death: a randomized trial. J Obstet Gynaecol Res. 2015;41:1884-1890. doi: 10.1111/jog.12815.
  24. Fyfe R, Murray H. Comparison of induction of labour regimens for termination of pregnancy with and without mifepristone, from 20 to 41 weeks gestation. Aust N Z J Obstet Gynaecol. 2017;57:604-608. doi: 10.1111 /ajo.12648.
  25. Panda S, Jha V, Singh S. Role of combination of mifepristone and misoprostol verses misoprostol alone in induction of labour in late intrauterine fetal death: a prospective study. J Family Reprod Health. 2013;7:177-179.
  26. Vayrynen W, Heikinheimo O, Nuutila M. Misoprostol-only versus mifepristone plus misoprostol in induction of labor following intrauterine fetal death. Acta Obstet Gynecol Scand. 2007;86: 701-705. doi: 10.1080/00016340701379853.
  27. Sharma D, Singhal SR, Poonam AP. Comparison of mifepristone combination with misoprostol and misoprostol alone in the management of intrauterine death. Taiwan J Obstet Gynecol. 2011;50:322-325. doi: 10.1016/j.tjog.2011.07.007.
  28. Stibbe KJM, de Weerd S. Induction of delivery by mifepristone and misoprostol in termination  of pregnancy and intrauterine fetal death: 2nd and 3rd trimester induction of labour. Arch Gynecol Obstet. 2012;286:795-796. doi: 10.1007 /s00404-012-2289-3. 
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Gynecology and Reproductive Biology 
Harvard Medical School 
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Gynecology and Reproductive Biology 
Harvard Medical School 
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In the uterus, coordinated myometrial cell contraction is not triggered by neural activation; instead, myometrial cells work together as a contractile syncytium through cell-to-cell gap junction connections permitting the intercellular sharing of small molecules, which in turn facilitates activation of the actin-myosin contractile apparatus and coordinated uterine contraction. In myometrial cells, connexin 43 (Cx43) is the main gap junction protein. Cx43 permits the passage of small hydrophilic molecules (ATP) and ions (calcium) cell to cell. Estradiol increases Cx43 synthesis in human myometrial cells.1 Progesterone decreases Cx43 synthesis effectively isolating myometrial cells, reducing cell-to-cell sharing of chemicals that stimulate contraction, blocking coordinated uterine contraction.2 Progesterone suppression of Cx43 synthesis helps to prevent premature uterine contraction during pregnancy. At term, decreases in progesterone levels result in an increase in Cx43 synthesis, facilitating the onset of effective labor. In myometrial cells, antiprogestins, including mifepristone, increase the number of gap junction connections, facilitating a coordinated contractile signal in response to misoprostol or oxytocin.3,4

It takes time for antiprogestins to stimulate myometrial cell production of Cx43. In the rat myometrium the administration of mifepristone results in a 2.5-fold increase of Cx43 mRNA transcripts within 9 hours and a 5.6-fold increase in 24 hours.3 Hence, most mifepristone treatment protocols involve administering mifepristone and waiting 24 to 48 hours before administering an agent that stimulates myometrial contraction, such as misoprostol. Antiprogestins also increase the sensitivity of myometrial cells to oxytocin stimulation of uterine contractions by increasing Cx43 concentration.4

Progesterone also regulates other important biological processes in the cervix, decidua, placenta, and cervix. Antiprogestins can facilitate cervical ripening and disrupt decidual function, interfering with the attachment of pregnancy tissue.5 In the cervix, antiprogestins increase matrix metalloproteinase expression, disrupting collagen organization, decreasing cervical tensile strength and leading to cervical ripening.6

Pharmacology of mifepristone

Mifepristone is an antiprogestin and antiglucocorticoid with high-affinity binding to both the progesterone and glucocorticoid receptors (FIGURE 1). The phenylaminodimethyl group at C-11 of mifepristone changes the positional equilibrium of helix 12 of the progesterone receptor, reducing the ability of the receptor to bind required co-activators, limiting receptor binding to DNA, resulting in an antiprogesterone effect.7 At the low, single-dose used for treatment of miscarriage and fetal demise (200 mg one dose), mifepristone is an antiprogestin. At the high, daily dose used for the treatment of hyperglycemia caused by Cushing disease (≥ 300 mg daily), mifepristone is also an antiglucocorticoid.

FIGURE  The chemical structure of progesterone and the antiprogestin, mifepristone. When mifepristone binds to the progesterone receptor, the phenylaminodimethyl group at C-11 reduces the ability of the mifepristone-progesterone receptor complex to bind co-activators necessary for the initiation of DNA transcription, creating an antiprogestin effect.

Although mifepristone is a powerful antiglucocorticoid, in patients with an intact hypothalamic-pituitary-adrenal axis, mifepristone does not cause adrenal insufficiency. In people with an intact hypothalamic-pituitary-adrenal axis, daily administration of mifepristone (≥ 200 mg) for 7 days or longer results in an increase in pituitary secretion of ACTH and adrenal secretion of cortisol, largely overcoming the antiglucocorticoid action of mifepristone.8-10 This compensatory increase in ACTH and cortisol is not possible in patients who have had a hypophysectomy or bilateral adrenalectomy or have adrenal suppression due to long-term treatment with high doses of glucocorticoids. Mifepristone is contraindicated for patients with these conditions because it may cause glucocorticoid insufficiency by blocking glucocorticoid receptors.

The terminal half-life of mifepristone is 18 hours.11 Following oral administration of a single dose of mifepristone 200 mg the peak circulating concentration is reached in 90 minutes. Mifepristone is metabolized by CYP3A4 and is also a strong inhibitor of CYP3A4. Contraindications to the use of mifepristone include adrenal failure, porphyria, hemorrhagic diseases, anticoagulation, an IUD in the uterus, ectopic pregnancy, long-term glucocorticoid administration, and an undiagnosed adnexal mass.

Continue to: Mifepristone-misoprostol for the treatment of early missed miscarriage with a gestational sac...

 

 

Mifepristone-misoprostol for the treatment of early missed miscarriage with a gestational sac

For patients with a miscarriage, the treatment options to resolve the pregnancy loss are expectant management, medication, or surgery.12 Joint decision-making is recommended to establish a management plan that supports the patient’s values. Expectant management is most likely to result in a multi-week process to achieve completion of the miscarriage. A surgical procedure is most likely to result in rapid resolution of the miscarriage with the greatest rate of success. Surgical evacuation of the uterus may be the preferred option for patients who have excessive uterine bleeding or concerning vital signs. Both medical and surgical management are more likely than expectant management to successfully resolve the miscarriage.13

In the past, the standard approach to medication management of a miscarriage was the administration of one or more doses of misoprostol, a synthetic prostaglandin E1. However, two large trials have reported that the dual-medication sequence of mifepristone followed 24 to 48 hours later by misoprostol is more effective than misoprostol alone for resolving a miscarriage.14,15 This is probably due to mifepristone making the uterus more responsive to the effects of misoprostol.

Schreiber and colleagues14 reported a study of 300 patients with an anembryonic gestation or embryonic demise, between 5 and 12 completed weeks of gestation, who were randomly assigned to treatment with mifepristone (200 mg) followed in 24 to 48 hours with vaginal misoprostol (800 µg) or vaginal misoprostol (800 µg) alone. Ultrasonography was performed 1 to 4 days after misoprostol administration. Successful treatment was defined as expulsion of the gestational sac plus no additional surgical or medical intervention within 30 days after treatment. In this study, the dual-medication regimen of mifepristone-misoprostol was more successful than misoprostol alone in resolving the miscarriage, 84% and 67%, respectively (relative risk [RR], 1.25; 95% confidence interval [CI], 1.09–1.43).

Surgical evacuation of the uterus occurred less often with mifepristone-misoprostol treatment than with misoprostol monotherapy—9% and 24%, respectively (RR, 0.37; 95% CI, 0.21–0.68). Pelvic infection occurred in 2 patients (1.3%) in each group. Uterine bleeding managed with blood transfusion occurred in 3 patients who received mifepristone-misoprostol and 1 patient who received misoprostol alone. In this study, clinical factors including active bleeding, parity, and gestational age did not influence treatment success with the mifepristone-misoprostol regimen.16 The mifepristone-misoprostol regimen was reported to be more cost-effective than misoprostol alone.17

Chu and colleagues15 reported a study of medication treatment of missed miscarriage that included more than 700 patients randomly assigned to treatment with mifepristone-misoprostol or placebo-misoprostol. Missed miscarriage was diagnosed by an ultrasound demonstrating a gestational sac and a nonviable pregnancy. The doses of mifepristone and misoprostol were 200 mg and 800 µg, respectively. In this study the misoprostol was administered 48 hours following mifepristone or placebo using a vaginal, oral, or buccal route, but 90% of patients used the vaginal route. Treatment was considered successful if the patient passed the gestational sac as determined by an ultrasound performed 7 days after entry into the study. If the gestational sac was passed, the patients were asked to do a urine pregnancy test 3 weeks after entering the study to conclude their care episode. If patients did not pass the gestational sac, they were offered a second dose of misoprostol or surgical evacuation. In this study, mifepristone-misoprostol resulted in fewer patients who did not pass the gestational sac within 7 days after entry into the study than placebo (mifepristone-misoprostol, 17% vs placebo-misoprostol, 24% (P=.043). Surgical intervention was performed in 25% of patients treated with placebo-misoprostol and 17% of patients treated with mifepristone-misoprostol (RR, 0.73; 95% CI, 0.53–0.95; P=.021). A cost-effectiveness analysis of the trial results reported that the combination of mifepristone-misoprostol was less costly than misoprostol alone for the management of missed miscarriages.18

Misoprostol can be administered by an oral, buccal, rectal, or vaginal route.19,20 Vaginal administration results in higher circulating concentrations of misoprostol than buccal administration, but both routes of administration produce similar mean uterine tone and mean uterine activity as measured by an intrauterine pressure transducer over 5 hours.21 Hence, at our institution, we most often use buccal administration of misoprostol. To assess effectiveness of mifepristone-misoprostol treatment, 1 week after treatment with a pelvic ultrasound to detect expulsion of the gestational sac. Alternatively, a urine pregnancy test can be performed 3 weeks following medication treatment. The mifepristone-misoprostol regimen is not approved by the US Food and Drug Administration for the treatment of miscarriage.

Continue to: Mifepristone-misoprostol for the treatment of fetal demise...

 

 

Mifepristone-misoprostol for the treatment of fetal demise

Fetal loss in the second or third trimesters is a devastating experience for most patients, painfully echoing in the heart and mind for years. Empathic and effective treatment of fetal loss may reduce the adverse impact of the event. Multiple studies have reported that combinations of mifepristone and misoprostol reduced the time from initiation of labor contractions to birth compared with misoprostol alone.22-28 In addition, the combination of mifepristone-misoprostol reduced the amount of misoprostol needed to achieve delivery.22,23

In one clinical trial, 66 patients with fetal demise between 14 and 28 weeks’ gestation were randomized to receive mifepristone 200 mg or placebo.22 Twenty-four to 48 hours later, misoprostol for induction of labor was initiated. Among the patients from 14 to 23 completed weeks of gestation, the misoprostol dose was 400 µg vaginally every 6 hours. For patients from 24 to 28 weeks gestation, the misoprostol dose was 200 µg vaginally every 4 hours. The median times from initiation of misoprostol to birth for the patients in the mifepristone and placebo groups were 6.8 hours and 10.5 hours (P=.002).

Compared with the patients in the placebo-misoprostol group, the patients in the mifepristone-misoprostol group required fewer doses of misoprostol (2.1 vs 3.4; P=.002) and a lower total dose of misoprostol (768 µg vs 1,182 µg; P=.003). All patients in the mifepristone group delivered within 24 hours. By contrast, 13% of the patients in the placebo group delivered more than 24 hours after the initiation of misoprostol treatment. Five patients were readmitted with retained products of conception needing suction curettage—4 in the placebo group and 1 in the mifepristone group.22

In a second clinical trial, 110 patients with fetal demise after 20 weeks of gestation were randomized to receive mifepristone 200 mg or placebo.23 Thirty-six to 48 hours later, misoprostol for induction of labor was initiated. Among the patients from 20 to 25 completed weeks of gestation, the misoprostol dose was 100 µg vaginally every 6 hours for a maximum of 4 doses. For patients ≥26 weeks gestation, the misoprostol dose was 50 µg vaginally every 4 hours for a maximum of 6 doses. The median times from initiation of misoprostol to birth for the patients in the mifepristone and placebo groups were 9.8 hours and 16.3 hours. (P=.001).

Compared with the patients in the placebo-misoprostol group, the patients in the mifepristone-misoprostol group required a lower total dose of misoprostol (110 µg vs 198 µg, P<.001).

Delivery within 24 hours following initiation of misoprostol occurred in 93% and 73% of the patients in the mifepristone and placebo groups, respectively (P<.001). Compared with patients in the mifepristone group, shivering occurred more frequently among the patients in the placebo group (7.5% vs 19.2%; P=.09), likely because they received greater doses of misoprostol.23

Miscarriage and fetal demise frequently cause patients to experience a range of emotions including denial, numbness, grief, anger, guilt, and depression. It may take months or years for people to progress to a tentative acceptance of the loss, refocusing on future aspirations. Empathic care and timely and effective medical intervention to resolve the pregnancy loss optimize outcomes. For medication treatment of miscarriage and fetal demise, mifepristone is an important agent because it improves the success rate for resolution of miscarriage without surgery and it shortens the time of labor for inductions for fetal demise. Obstetrician-gynecologists are the specialists leading advances in treatment of miscarriage and fetal demise. I encourage you to use mifepristone in your care of appropriate patients with miscarriage and fetal demise. ●

 

 

In the uterus, coordinated myometrial cell contraction is not triggered by neural activation; instead, myometrial cells work together as a contractile syncytium through cell-to-cell gap junction connections permitting the intercellular sharing of small molecules, which in turn facilitates activation of the actin-myosin contractile apparatus and coordinated uterine contraction. In myometrial cells, connexin 43 (Cx43) is the main gap junction protein. Cx43 permits the passage of small hydrophilic molecules (ATP) and ions (calcium) cell to cell. Estradiol increases Cx43 synthesis in human myometrial cells.1 Progesterone decreases Cx43 synthesis effectively isolating myometrial cells, reducing cell-to-cell sharing of chemicals that stimulate contraction, blocking coordinated uterine contraction.2 Progesterone suppression of Cx43 synthesis helps to prevent premature uterine contraction during pregnancy. At term, decreases in progesterone levels result in an increase in Cx43 synthesis, facilitating the onset of effective labor. In myometrial cells, antiprogestins, including mifepristone, increase the number of gap junction connections, facilitating a coordinated contractile signal in response to misoprostol or oxytocin.3,4

It takes time for antiprogestins to stimulate myometrial cell production of Cx43. In the rat myometrium the administration of mifepristone results in a 2.5-fold increase of Cx43 mRNA transcripts within 9 hours and a 5.6-fold increase in 24 hours.3 Hence, most mifepristone treatment protocols involve administering mifepristone and waiting 24 to 48 hours before administering an agent that stimulates myometrial contraction, such as misoprostol. Antiprogestins also increase the sensitivity of myometrial cells to oxytocin stimulation of uterine contractions by increasing Cx43 concentration.4

Progesterone also regulates other important biological processes in the cervix, decidua, placenta, and cervix. Antiprogestins can facilitate cervical ripening and disrupt decidual function, interfering with the attachment of pregnancy tissue.5 In the cervix, antiprogestins increase matrix metalloproteinase expression, disrupting collagen organization, decreasing cervical tensile strength and leading to cervical ripening.6

Pharmacology of mifepristone

Mifepristone is an antiprogestin and antiglucocorticoid with high-affinity binding to both the progesterone and glucocorticoid receptors (FIGURE 1). The phenylaminodimethyl group at C-11 of mifepristone changes the positional equilibrium of helix 12 of the progesterone receptor, reducing the ability of the receptor to bind required co-activators, limiting receptor binding to DNA, resulting in an antiprogesterone effect.7 At the low, single-dose used for treatment of miscarriage and fetal demise (200 mg one dose), mifepristone is an antiprogestin. At the high, daily dose used for the treatment of hyperglycemia caused by Cushing disease (≥ 300 mg daily), mifepristone is also an antiglucocorticoid.

FIGURE  The chemical structure of progesterone and the antiprogestin, mifepristone. When mifepristone binds to the progesterone receptor, the phenylaminodimethyl group at C-11 reduces the ability of the mifepristone-progesterone receptor complex to bind co-activators necessary for the initiation of DNA transcription, creating an antiprogestin effect.

Although mifepristone is a powerful antiglucocorticoid, in patients with an intact hypothalamic-pituitary-adrenal axis, mifepristone does not cause adrenal insufficiency. In people with an intact hypothalamic-pituitary-adrenal axis, daily administration of mifepristone (≥ 200 mg) for 7 days or longer results in an increase in pituitary secretion of ACTH and adrenal secretion of cortisol, largely overcoming the antiglucocorticoid action of mifepristone.8-10 This compensatory increase in ACTH and cortisol is not possible in patients who have had a hypophysectomy or bilateral adrenalectomy or have adrenal suppression due to long-term treatment with high doses of glucocorticoids. Mifepristone is contraindicated for patients with these conditions because it may cause glucocorticoid insufficiency by blocking glucocorticoid receptors.

The terminal half-life of mifepristone is 18 hours.11 Following oral administration of a single dose of mifepristone 200 mg the peak circulating concentration is reached in 90 minutes. Mifepristone is metabolized by CYP3A4 and is also a strong inhibitor of CYP3A4. Contraindications to the use of mifepristone include adrenal failure, porphyria, hemorrhagic diseases, anticoagulation, an IUD in the uterus, ectopic pregnancy, long-term glucocorticoid administration, and an undiagnosed adnexal mass.

Continue to: Mifepristone-misoprostol for the treatment of early missed miscarriage with a gestational sac...

 

 

Mifepristone-misoprostol for the treatment of early missed miscarriage with a gestational sac

For patients with a miscarriage, the treatment options to resolve the pregnancy loss are expectant management, medication, or surgery.12 Joint decision-making is recommended to establish a management plan that supports the patient’s values. Expectant management is most likely to result in a multi-week process to achieve completion of the miscarriage. A surgical procedure is most likely to result in rapid resolution of the miscarriage with the greatest rate of success. Surgical evacuation of the uterus may be the preferred option for patients who have excessive uterine bleeding or concerning vital signs. Both medical and surgical management are more likely than expectant management to successfully resolve the miscarriage.13

In the past, the standard approach to medication management of a miscarriage was the administration of one or more doses of misoprostol, a synthetic prostaglandin E1. However, two large trials have reported that the dual-medication sequence of mifepristone followed 24 to 48 hours later by misoprostol is more effective than misoprostol alone for resolving a miscarriage.14,15 This is probably due to mifepristone making the uterus more responsive to the effects of misoprostol.

Schreiber and colleagues14 reported a study of 300 patients with an anembryonic gestation or embryonic demise, between 5 and 12 completed weeks of gestation, who were randomly assigned to treatment with mifepristone (200 mg) followed in 24 to 48 hours with vaginal misoprostol (800 µg) or vaginal misoprostol (800 µg) alone. Ultrasonography was performed 1 to 4 days after misoprostol administration. Successful treatment was defined as expulsion of the gestational sac plus no additional surgical or medical intervention within 30 days after treatment. In this study, the dual-medication regimen of mifepristone-misoprostol was more successful than misoprostol alone in resolving the miscarriage, 84% and 67%, respectively (relative risk [RR], 1.25; 95% confidence interval [CI], 1.09–1.43).

Surgical evacuation of the uterus occurred less often with mifepristone-misoprostol treatment than with misoprostol monotherapy—9% and 24%, respectively (RR, 0.37; 95% CI, 0.21–0.68). Pelvic infection occurred in 2 patients (1.3%) in each group. Uterine bleeding managed with blood transfusion occurred in 3 patients who received mifepristone-misoprostol and 1 patient who received misoprostol alone. In this study, clinical factors including active bleeding, parity, and gestational age did not influence treatment success with the mifepristone-misoprostol regimen.16 The mifepristone-misoprostol regimen was reported to be more cost-effective than misoprostol alone.17

Chu and colleagues15 reported a study of medication treatment of missed miscarriage that included more than 700 patients randomly assigned to treatment with mifepristone-misoprostol or placebo-misoprostol. Missed miscarriage was diagnosed by an ultrasound demonstrating a gestational sac and a nonviable pregnancy. The doses of mifepristone and misoprostol were 200 mg and 800 µg, respectively. In this study the misoprostol was administered 48 hours following mifepristone or placebo using a vaginal, oral, or buccal route, but 90% of patients used the vaginal route. Treatment was considered successful if the patient passed the gestational sac as determined by an ultrasound performed 7 days after entry into the study. If the gestational sac was passed, the patients were asked to do a urine pregnancy test 3 weeks after entering the study to conclude their care episode. If patients did not pass the gestational sac, they were offered a second dose of misoprostol or surgical evacuation. In this study, mifepristone-misoprostol resulted in fewer patients who did not pass the gestational sac within 7 days after entry into the study than placebo (mifepristone-misoprostol, 17% vs placebo-misoprostol, 24% (P=.043). Surgical intervention was performed in 25% of patients treated with placebo-misoprostol and 17% of patients treated with mifepristone-misoprostol (RR, 0.73; 95% CI, 0.53–0.95; P=.021). A cost-effectiveness analysis of the trial results reported that the combination of mifepristone-misoprostol was less costly than misoprostol alone for the management of missed miscarriages.18

Misoprostol can be administered by an oral, buccal, rectal, or vaginal route.19,20 Vaginal administration results in higher circulating concentrations of misoprostol than buccal administration, but both routes of administration produce similar mean uterine tone and mean uterine activity as measured by an intrauterine pressure transducer over 5 hours.21 Hence, at our institution, we most often use buccal administration of misoprostol. To assess effectiveness of mifepristone-misoprostol treatment, 1 week after treatment with a pelvic ultrasound to detect expulsion of the gestational sac. Alternatively, a urine pregnancy test can be performed 3 weeks following medication treatment. The mifepristone-misoprostol regimen is not approved by the US Food and Drug Administration for the treatment of miscarriage.

Continue to: Mifepristone-misoprostol for the treatment of fetal demise...

 

 

Mifepristone-misoprostol for the treatment of fetal demise

Fetal loss in the second or third trimesters is a devastating experience for most patients, painfully echoing in the heart and mind for years. Empathic and effective treatment of fetal loss may reduce the adverse impact of the event. Multiple studies have reported that combinations of mifepristone and misoprostol reduced the time from initiation of labor contractions to birth compared with misoprostol alone.22-28 In addition, the combination of mifepristone-misoprostol reduced the amount of misoprostol needed to achieve delivery.22,23

In one clinical trial, 66 patients with fetal demise between 14 and 28 weeks’ gestation were randomized to receive mifepristone 200 mg or placebo.22 Twenty-four to 48 hours later, misoprostol for induction of labor was initiated. Among the patients from 14 to 23 completed weeks of gestation, the misoprostol dose was 400 µg vaginally every 6 hours. For patients from 24 to 28 weeks gestation, the misoprostol dose was 200 µg vaginally every 4 hours. The median times from initiation of misoprostol to birth for the patients in the mifepristone and placebo groups were 6.8 hours and 10.5 hours (P=.002).

Compared with the patients in the placebo-misoprostol group, the patients in the mifepristone-misoprostol group required fewer doses of misoprostol (2.1 vs 3.4; P=.002) and a lower total dose of misoprostol (768 µg vs 1,182 µg; P=.003). All patients in the mifepristone group delivered within 24 hours. By contrast, 13% of the patients in the placebo group delivered more than 24 hours after the initiation of misoprostol treatment. Five patients were readmitted with retained products of conception needing suction curettage—4 in the placebo group and 1 in the mifepristone group.22

In a second clinical trial, 110 patients with fetal demise after 20 weeks of gestation were randomized to receive mifepristone 200 mg or placebo.23 Thirty-six to 48 hours later, misoprostol for induction of labor was initiated. Among the patients from 20 to 25 completed weeks of gestation, the misoprostol dose was 100 µg vaginally every 6 hours for a maximum of 4 doses. For patients ≥26 weeks gestation, the misoprostol dose was 50 µg vaginally every 4 hours for a maximum of 6 doses. The median times from initiation of misoprostol to birth for the patients in the mifepristone and placebo groups were 9.8 hours and 16.3 hours. (P=.001).

Compared with the patients in the placebo-misoprostol group, the patients in the mifepristone-misoprostol group required a lower total dose of misoprostol (110 µg vs 198 µg, P<.001).

Delivery within 24 hours following initiation of misoprostol occurred in 93% and 73% of the patients in the mifepristone and placebo groups, respectively (P<.001). Compared with patients in the mifepristone group, shivering occurred more frequently among the patients in the placebo group (7.5% vs 19.2%; P=.09), likely because they received greater doses of misoprostol.23

Miscarriage and fetal demise frequently cause patients to experience a range of emotions including denial, numbness, grief, anger, guilt, and depression. It may take months or years for people to progress to a tentative acceptance of the loss, refocusing on future aspirations. Empathic care and timely and effective medical intervention to resolve the pregnancy loss optimize outcomes. For medication treatment of miscarriage and fetal demise, mifepristone is an important agent because it improves the success rate for resolution of miscarriage without surgery and it shortens the time of labor for inductions for fetal demise. Obstetrician-gynecologists are the specialists leading advances in treatment of miscarriage and fetal demise. I encourage you to use mifepristone in your care of appropriate patients with miscarriage and fetal demise. ●

References
  1. Andersen J, Grine E, Eng L, et al. Expression of connexin-43 in human myometrium and leiomyoma. Am J Obstet Gynecol. 1993;169:1266-1276. doi: 10.1016/0002-9378(93)90293-r.
  2. Ou CW, Orsino A, Lye SJ. Expression of connexin-43 and connexin-26 in the rat myometrium during pregnancy and labor is differentially regulated by mechanical and hormonal signals. Endocrinology. 1997;138:5398-5407. doi: 10.1210 /endo.138.12.5624.
  3. Petrocelli T, Lye SJ. Regulation of transcripts encoding the myometrial gap junction protein, connexin-43, by estrogen and progesterone. Endocrinology. 1993;133:284-290. doi: 10.1210 /endo.133.1.8391423.
  4. Chwalisz K, Fahrenholz F, Hackenberg M, et al. The progesterone antagonist onapristone increases the effectiveness of oxytocin to produce delivery without changing the myometrial oxytocin receptor concentration. Am J Obstet Gynecol. 1991;165:1760-1770. doi: 10.1016/0002 -9378(91)90030-u.
  5. Large MJ, DeMayo FJ. The regulation of embryo implantation and endometrial decidualization by progesterone receptor signaling. Mol Cell Endocrinol. 2012;358:155-165. doi: 10.1016 /j.mce.2011.07.027.
  6. Clark K, Ji H, Feltovich H, et al. Mifepristone-induced cervical ripening: structural, biomechanical and molecular events. Am J Obstet Gynecol. 2006;194:1391-1398. doi: 10.1016 /j.ajog.2005.11.026.
  7. Raaijmakers HCA, Versteegh JE, Uitdehaag JCM. T he x-ray structure of RU486 bound to the progesterone receptor in a destabilized agonist conformation. J Biol Chem. 2009;284:19572-19579. doi: 10.1074/jbc.M109.007872.
  8. Yuen KCJ, Moraitis A, Nguyen D. Evaluation of evidence of adrenal insufficiency in trials of normocortisolemic patients treated with mifepristone. J Endocr Soc. 2017;1:237-246. doi: 10.1210 /js.2016-1097.
  9. Spitz IM, Grunberg SM, Chabbert-Buffet N, et al. Management of patients receiving long-term treatment with mifepristone. Fertil Steril. 2005;84:1719-1726. doi: 10.1016 /j.fertnstert.2005.05.056.
  10. Bertagna X, Escourolle H, Pinquier JL, et al. Administration of RU 486 for 8 days in normal volunteers: antiglucocorticoid effect with no evidence of peripheral cortisol deprivation. J Clin Endocrinol Metab. 1994;78:375-380. doi: 10.1210 /jcem.78.2.8106625.
  11. Mifeprex [package insert]. New York, NY: Danco Laboratories; March 2016.
  12. Early pregnancy loss. ACOG Practice Bulletin No 200. American College of Obstetricians and Gynecologists. Obstet Gynecol. 2018;132:e197-e207. doi: /AOG.0000000000002899. 10.1097
  13. Chu J, Devall AJ, Hardy P, et al. What is the best method for managing early miscarriage? BMJ. 2020;368:l6483. doi: 10.1136/bmj.l6438.
  14. Schreiber C, Creinin MD, Atrio J, et al. Mifepristone pretreatment for the medical management of early pregnancy loss. N Engl J Med. 2018;378:2161-2170. doi: 10.1056 /NEJMoa1715726.
  15. Chu JJ, Devall AJ, Beeson LE, et al. Mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage (MifeMiso): a randomised, double-blind, placebo-controlled trial. Lancet. 2020;396:770-778. doi: 10.1016 /S0140-6736(20)31788-8.
  16. Sonalkar S, Koelper N, Creinin MD, et al. Management of early pregnancy loss with mifepristone and misoprostol: clinical predictors of treatment success from a randomized trial. Am J Obstet Gynecol. 2020;223:551.e1-e7. doi: 10.1016/j. ajog.2020.04.006. 17.
  17. Nagendra D, Koelper N, Loza-Avalos SE, et al. Cost-effectiveness of mifepristone pretreatment for the medical management of nonviable early pregnancy: secondary analysis of a randomized clinical trial. JAMA Netw Open. 2020;3:e201594. doi: 10.1001/jamanetworkopen.2020.1594.
  18. Okeke-Ogwulu CB, Williams EV, Chu JJ, et al. Cost-effectiveness of mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage: an economic evaluation based on the MifeMiso trial. BJOG. 2021;128: 1534-1545. doi: 10.1111/1471-0528.16737.
  19. Tang OS, Schweer H, Seyberth HW, et al. Pharmacokinetics of different routes of administration of misoprostol. Hum Reprod. 2002;17:332336. doi: 10.1093/humrep/17.2.332.
  20. Schaff EA, DiCenzo R, Fielding SL. Comparison of misoprostol plasma concentrations following buccal and sublingual administration. Contraception. 2005;71:22-25. doi: 10.1016 /j.contraception.2004.06.014.
  21. Meckstroth KR, Whitaker AK, Bertisch S, et al. Misoprostol administered by epithelial routes: drug absorption and uterine response. Obstet Gynecol. 2006;108:582-590. doi: 10.1097/01 .AOG.0000230398.32794.9d.
  22. Allanson ER, Copson S, Spilsbury K, et al. Pretreatment with mifepristone compared with misoprostol alone for delivery after fetal death between 14 and 28 weeks of gestation. Obstet Gynecol. 2021;137:801-809. doi: 10.1097 /AOG.0000000000004344.
  23. Chaudhuri P, Datta S. Mifepristone and misoprostol compared with misoprostol alone for induction of labor in intrauterine fetal death: a randomized trial. J Obstet Gynaecol Res. 2015;41:1884-1890. doi: 10.1111/jog.12815.
  24. Fyfe R, Murray H. Comparison of induction of labour regimens for termination of pregnancy with and without mifepristone, from 20 to 41 weeks gestation. Aust N Z J Obstet Gynaecol. 2017;57:604-608. doi: 10.1111 /ajo.12648.
  25. Panda S, Jha V, Singh S. Role of combination of mifepristone and misoprostol verses misoprostol alone in induction of labour in late intrauterine fetal death: a prospective study. J Family Reprod Health. 2013;7:177-179.
  26. Vayrynen W, Heikinheimo O, Nuutila M. Misoprostol-only versus mifepristone plus misoprostol in induction of labor following intrauterine fetal death. Acta Obstet Gynecol Scand. 2007;86: 701-705. doi: 10.1080/00016340701379853.
  27. Sharma D, Singhal SR, Poonam AP. Comparison of mifepristone combination with misoprostol and misoprostol alone in the management of intrauterine death. Taiwan J Obstet Gynecol. 2011;50:322-325. doi: 10.1016/j.tjog.2011.07.007.
  28. Stibbe KJM, de Weerd S. Induction of delivery by mifepristone and misoprostol in termination  of pregnancy and intrauterine fetal death: 2nd and 3rd trimester induction of labour. Arch Gynecol Obstet. 2012;286:795-796. doi: 10.1007 /s00404-012-2289-3. 
References
  1. Andersen J, Grine E, Eng L, et al. Expression of connexin-43 in human myometrium and leiomyoma. Am J Obstet Gynecol. 1993;169:1266-1276. doi: 10.1016/0002-9378(93)90293-r.
  2. Ou CW, Orsino A, Lye SJ. Expression of connexin-43 and connexin-26 in the rat myometrium during pregnancy and labor is differentially regulated by mechanical and hormonal signals. Endocrinology. 1997;138:5398-5407. doi: 10.1210 /endo.138.12.5624.
  3. Petrocelli T, Lye SJ. Regulation of transcripts encoding the myometrial gap junction protein, connexin-43, by estrogen and progesterone. Endocrinology. 1993;133:284-290. doi: 10.1210 /endo.133.1.8391423.
  4. Chwalisz K, Fahrenholz F, Hackenberg M, et al. The progesterone antagonist onapristone increases the effectiveness of oxytocin to produce delivery without changing the myometrial oxytocin receptor concentration. Am J Obstet Gynecol. 1991;165:1760-1770. doi: 10.1016/0002 -9378(91)90030-u.
  5. Large MJ, DeMayo FJ. The regulation of embryo implantation and endometrial decidualization by progesterone receptor signaling. Mol Cell Endocrinol. 2012;358:155-165. doi: 10.1016 /j.mce.2011.07.027.
  6. Clark K, Ji H, Feltovich H, et al. Mifepristone-induced cervical ripening: structural, biomechanical and molecular events. Am J Obstet Gynecol. 2006;194:1391-1398. doi: 10.1016 /j.ajog.2005.11.026.
  7. Raaijmakers HCA, Versteegh JE, Uitdehaag JCM. T he x-ray structure of RU486 bound to the progesterone receptor in a destabilized agonist conformation. J Biol Chem. 2009;284:19572-19579. doi: 10.1074/jbc.M109.007872.
  8. Yuen KCJ, Moraitis A, Nguyen D. Evaluation of evidence of adrenal insufficiency in trials of normocortisolemic patients treated with mifepristone. J Endocr Soc. 2017;1:237-246. doi: 10.1210 /js.2016-1097.
  9. Spitz IM, Grunberg SM, Chabbert-Buffet N, et al. Management of patients receiving long-term treatment with mifepristone. Fertil Steril. 2005;84:1719-1726. doi: 10.1016 /j.fertnstert.2005.05.056.
  10. Bertagna X, Escourolle H, Pinquier JL, et al. Administration of RU 486 for 8 days in normal volunteers: antiglucocorticoid effect with no evidence of peripheral cortisol deprivation. J Clin Endocrinol Metab. 1994;78:375-380. doi: 10.1210 /jcem.78.2.8106625.
  11. Mifeprex [package insert]. New York, NY: Danco Laboratories; March 2016.
  12. Early pregnancy loss. ACOG Practice Bulletin No 200. American College of Obstetricians and Gynecologists. Obstet Gynecol. 2018;132:e197-e207. doi: /AOG.0000000000002899. 10.1097
  13. Chu J, Devall AJ, Hardy P, et al. What is the best method for managing early miscarriage? BMJ. 2020;368:l6483. doi: 10.1136/bmj.l6438.
  14. Schreiber C, Creinin MD, Atrio J, et al. Mifepristone pretreatment for the medical management of early pregnancy loss. N Engl J Med. 2018;378:2161-2170. doi: 10.1056 /NEJMoa1715726.
  15. Chu JJ, Devall AJ, Beeson LE, et al. Mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage (MifeMiso): a randomised, double-blind, placebo-controlled trial. Lancet. 2020;396:770-778. doi: 10.1016 /S0140-6736(20)31788-8.
  16. Sonalkar S, Koelper N, Creinin MD, et al. Management of early pregnancy loss with mifepristone and misoprostol: clinical predictors of treatment success from a randomized trial. Am J Obstet Gynecol. 2020;223:551.e1-e7. doi: 10.1016/j. ajog.2020.04.006. 17.
  17. Nagendra D, Koelper N, Loza-Avalos SE, et al. Cost-effectiveness of mifepristone pretreatment for the medical management of nonviable early pregnancy: secondary analysis of a randomized clinical trial. JAMA Netw Open. 2020;3:e201594. doi: 10.1001/jamanetworkopen.2020.1594.
  18. Okeke-Ogwulu CB, Williams EV, Chu JJ, et al. Cost-effectiveness of mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage: an economic evaluation based on the MifeMiso trial. BJOG. 2021;128: 1534-1545. doi: 10.1111/1471-0528.16737.
  19. Tang OS, Schweer H, Seyberth HW, et al. Pharmacokinetics of different routes of administration of misoprostol. Hum Reprod. 2002;17:332336. doi: 10.1093/humrep/17.2.332.
  20. Schaff EA, DiCenzo R, Fielding SL. Comparison of misoprostol plasma concentrations following buccal and sublingual administration. Contraception. 2005;71:22-25. doi: 10.1016 /j.contraception.2004.06.014.
  21. Meckstroth KR, Whitaker AK, Bertisch S, et al. Misoprostol administered by epithelial routes: drug absorption and uterine response. Obstet Gynecol. 2006;108:582-590. doi: 10.1097/01 .AOG.0000230398.32794.9d.
  22. Allanson ER, Copson S, Spilsbury K, et al. Pretreatment with mifepristone compared with misoprostol alone for delivery after fetal death between 14 and 28 weeks of gestation. Obstet Gynecol. 2021;137:801-809. doi: 10.1097 /AOG.0000000000004344.
  23. Chaudhuri P, Datta S. Mifepristone and misoprostol compared with misoprostol alone for induction of labor in intrauterine fetal death: a randomized trial. J Obstet Gynaecol Res. 2015;41:1884-1890. doi: 10.1111/jog.12815.
  24. Fyfe R, Murray H. Comparison of induction of labour regimens for termination of pregnancy with and without mifepristone, from 20 to 41 weeks gestation. Aust N Z J Obstet Gynaecol. 2017;57:604-608. doi: 10.1111 /ajo.12648.
  25. Panda S, Jha V, Singh S. Role of combination of mifepristone and misoprostol verses misoprostol alone in induction of labour in late intrauterine fetal death: a prospective study. J Family Reprod Health. 2013;7:177-179.
  26. Vayrynen W, Heikinheimo O, Nuutila M. Misoprostol-only versus mifepristone plus misoprostol in induction of labor following intrauterine fetal death. Acta Obstet Gynecol Scand. 2007;86: 701-705. doi: 10.1080/00016340701379853.
  27. Sharma D, Singhal SR, Poonam AP. Comparison of mifepristone combination with misoprostol and misoprostol alone in the management of intrauterine death. Taiwan J Obstet Gynecol. 2011;50:322-325. doi: 10.1016/j.tjog.2011.07.007.
  28. Stibbe KJM, de Weerd S. Induction of delivery by mifepristone and misoprostol in termination  of pregnancy and intrauterine fetal death: 2nd and 3rd trimester induction of labour. Arch Gynecol Obstet. 2012;286:795-796. doi: 10.1007 /s00404-012-2289-3. 
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Monkeypox: Another emerging threat?

Article Type
Changed
Tue, 09/06/2022 - 12:55

 

 

CASE Pregnant woman’s husband is ill after traveling

A 29-year-old primigravid woman at 18 weeks’ gestation just returned from a 10-day trip to Nigeria with her husband. While in Nigeria, the couple went on safari. On several occasions during the safari, they consumed bushmeat prepared by their guides. Her husband now has severe malaise, fever, chills, myalgias, cough, and prominent submandibular, cervical, and inguinal adenopathy. In addition, he has developed a diffuse papular-vesicular rash on his trunk and extremities.

  • What is the most likely diagnosis?
  • Does this condition pose a danger to his wife?
  • What treatment is indicated for his wife?

What we know

In recent weeks, the specter of another poorly understood biological threat has emerged in the medical literature and lay press: monkeypox. This article will first review the epidemiology, clinical manifestations, and diagnosis of this infection, followed by a discussion of how to prevent and treat the condition, with special emphasis on the risks that this infection poses in pregnant women.

 

Virology

The monkeypox virus is a member of the orthopoxvirus genus. The variola (smallpox) virus and vaccinia virus are included in this genus. It is one of the largest of all viruses, measuring 200-250 nm. It is enveloped and contains double-stranded DNA. Its natural reservoir is probably African rodents. Two distinct strains of monkeypox exist in different geographical regions of Africa: the Central African clade and the West African clade. The Central African clade is significantly more virulent than the latter, with a mortality rate approaching 10%, versus 1% in the West African clade. The incubation period of the virus ranges from 4-20 days and averages 12 days.1,2

Epidemiology

Monkeypox was first discovered in 1958 by Preben von Magnus in a colony of research monkeys in Copenhagen, Denmark. The first case of monkeypox in humans occurred in the Democratic Republic of Congo in 1970 in a 9-year-old boy. Subsequently, cases were reported in the Ivory Coast, Liberia, Nigeria, and Sierra Leone. The infection was limited to the rain forests of central and western Africa until 2003. At that time, the first cases in the United States were reported. The US cases occurred in the Midwest and were traced to exposure to pet prairie dogs. These animals all came from a single distributor, and they apparently were infected when they were housed in the same space with Gambian rats, which are well recognized reservoirs of monkeypox in their native habitat in Africa.1-3

A limited outbreak of monkeypox occurred in the United Kingdom in 2018. Seventy-one cases, with no fatalities, were reported. In 2021 another US case of monkeypox was reported in Dallas, Texas, in an individual who had recently traveled to the United States from Nigeria. A second US case was reported in November 2021 from a patient in Maryland who had returned from a visit to Nigeria. Those were the only 2 reported cases of monkeypox in the United States in 2021.1-3

Then in early May 2022, the United Kingdom reported 9 cases of monkeypox. The first infected patient had recently traveled to Nigeria and, subsequently, infected 2 members of his family.4 On May 18, the Massachusetts Department of Public Health confirmed a case of monkeypox in an adult man who had recently traveled to Canada. As of July 7, 6,027 cases have been reported from at least 39 countries.5 Eight states in the United States reported cases. To date, 73 deaths have occurred in this recent outbreak of infections (case fatality rate, 4.5%).4-6

The current outbreak is unusual in that, previously, almost all cases occurred in western and central Africa in remote tropical rain forests. Infection usually resulted from close exposure to rats, rabbits, squirrels, monkeys, porcupines, and gazelles. Exposure occurred when persons captured, slaughtered, prepared, and then ate these animals for food without properly cooking the flesh.

The leading theory is that the present outbreak originated among men who had sex with men at 2 raves held in Spain and Belgium. The virus appears to have been spread by skin-to-skin contact, by respiratory droplets, by contact with contaminated bedding, and probably by sperm.2,4,6

Continue to: Clinical manifestations...

 

 

Clinical manifestations

Monkeypox evolves through 2 stages: a pre-eruptive stage and an eruptive stage. Prodromal symptoms include malaise, severe headache, myalgias, fever, drenching sweats, backache, fatigue, sore throat, dyspnea, and cough. Within 2-3 days, the characteristic skin eruption develops. The lesions usually begin on the face and then spread in a centrifugal manner to the trunk and extremities, including the palms of the hands and soles of the feet. The lesions typically progress from macules to papules to vesicles to pustules. They then crust and scab over. An interesting additional finding is the presence of prominent lymphadenopathy behind the ear, beneath the mandible, in the neck, and in the groin.1

Several different illnesses must be considered in the differential diagnosis of monkeypox infection. They include measles, scabies, secondary syphilis, and medication-associated allergic reactions. However, the 2 conditions most likely to be confused with monkeypox are chickenpox (varicella) and smallpox. Lymphadenopathy is much more prominent in monkeypox compared with chickenpox. Moreover, with monkeypox, all lesions tend to be at the same stage of evolution as opposed to appearing in crops as they do in chickenpox. Smallpox would be extremely unlikely in the absence of a recognized laboratory accident or a bioterrorism incident.7

 

Diagnosis

The presumptive diagnosis of monkeypox infection is made primarily based on clinical examination. However, laboratory testing is indicated to definitively differentiate monkeypox from other orthopoxvirus infections such as varicella and smallpox.

In specialized laboratories that employ highly trained personnel and maintain strict safety precautions, the virus can be isolated in mammalian cell cultures. Electron microscopy is a valuable tool for identifying the characteristic brick-shaped poxvirus virions. Routine histologic examination of a lesion will show ballooning degeneration of keratinocytes, prominent spongiosis, dermal edema, and acute inflammation, although these findings are not unique to monkeypox.1

The Centers for Disease Control and Prevention (CDC) has developed serologic tests that detect immunoglobulin (Ig) M- and IgG-specific antibody. However, the most useful and practical diagnostic test is assessment of a skin scraping by polymerase chain reaction (PCR). This test is more sensitive than assessment of serum PCR.1

When the diagnosis of monkeypox is being considered, the clinician should coordinate testing through the local and state public health departments and through the CDC. Effective communication with all agencies will ensure that laboratory specimens are processed in a timely and efficient manner. The CDC website presents information on specimen collection.8

How do we manage monkeypox?

Prevention

The first step in prevention of infection is to isolate infected individuals until all lesions have dried and crusted over. Susceptible people should avoid close contact with skin lesions, respiratory and genital secretions, and bedding of patients who are infected.

The ultimate preventive measure, however, is vaccination of susceptible people either immediately before exposure (eg, military personnel, first responders, infection control investigators, health care workers) or immediately after exposure (general population). Older individuals who received the original smallpox vaccine likely have immunity to monkeypox infection. Unfortunately, very few women who currently are of reproductive age received this vaccine because its use was discontinued in the United States in the early 1970s. Therefore, the vast majority of our patients are uniquely susceptible to this infection and should be vaccinated if there is an outbreak of monkeypox in their locality.7,9

The current preferred vaccine for prevention of both smallpox and monkeypox is the Jynneos (Bavarian Nordic A/S) vaccine.10 This agent incorporates a replication-deficient live virus and does not pose the same risk for adverse events as the original versions of the smallpox vaccine. Jynneos is administered subcutaneously rather than by scarification. Two 0.5-mL doses, delivered 28 days apart, are required for optimal effect. The vaccine must be obtained from local and state health departments, in consultation with the CDC.7,9

There is very little published information on the safety of the Jynneos vaccine in pregnant or lactating women, although animal data are reassuring. Moreover, the dangers of monkeypox infection are significant, and in the event of an outbreak, vaccination of susceptible individuals, including pregnant women, is indicated.

Key points at a glance
  • Monkeypox is a member of the orthopoxvirus genus and is closely related to the smallpox virus. It is a large, double-stranded, enveloped DNA virus.
  • The virus is transmitted primarily by close contact with infected animals or other humans or by consumption of contaminated bushmeat.
  • The infection evolves in 2 phases. The pre-eruptive phase is characterized by severe flu-like symptoms and signs. The eruptive phase is distinguished by a diffuse papular-vesicular rash.
  • The most valuable test for confirming the diagnosis is a polymerase chain reaction test of a fresh skin lesion.
  • In women who are pregnant, monkeypox has been associated with spontaneous abortion and fetal death.
  • Three antiviral agents may be of value in treating infected patients: cidofovir, brincidofovir, and tecovirimat. Only the latter has an acceptable safety profile for women who are pregnant or lactating.
  • The new nonreplicating smallpox vaccine Jynneos (Bavarian Nordic A/S) is of great value for pre- and post-exposure prophylaxis.

Continue to: Treatment...

 

 

Treatment

Infected pregnant women should receive acetaminophen 1,000 mg orally every 8 hours, to control fever and provide analgesia. An antihistamine such as diphenhydramine 25 mg orally every 6-8 hours, may be used to control pruritus and provide mild sedation. Adequate fluid intake and optimal nutrition should be encouraged. Skin lesions should be inspected regularly to detect signs of superimposed bacterial infections. Small, localized bacterial skin infections can be treated with topical application of mupirocin ointment 2%, 3 times daily for 7-14 days. For diffuse and more severe bacterial skin infections, a systemic antibiotic may be necessary. Reasonable choices include amoxicillin-clavulanate 875 mg/125 mg orally every 12 hours, or trimethoprim-sulfamethoxazole double strength 800 mg/160 mg orally every 12 hours.11 The latter agent should be avoided in the first trimester of pregnancy because of potential teratogenic effects.

Several specific agents are available through the CDC for treatment of orthopoxvirus infections such as smallpox and monkeypox. Information about these agents is summarized in the TABLE.12-16

 

Unique considerations in pregnancy

Because monkeypox is so rare, there is very little information about the effects of this infection in pregnant women. The report most commonly cited in the literature is that by Mbala et al, which was published in 2017.17 These authors described 4 pregnant patients in the Democratic Republic of Congo who contracted monkeypox infection over a 4-year period. All 4 women were hospitalized and treated with systemic antibiotics, antiparasitic medications, and analgesics. One patient delivered a healthy infant. Two women had spontaneous abortions in the first trimester. The fourth patient experienced a stillbirth at 22 weeks’ gestation. At postmortem examination, the fetus had diffuse cutaneous lesions, prominent hepatomegaly, and hydrops. No structural malformations were noted. The placenta demonstrated numerous punctate hemorrhages, and high concentrations of virus were recovered from the placenta and from fetal tissue.

Although the information on pregnancy outcome is quite limited, it seems clear that the virus can cross the placenta and cause adverse effects such as spontaneous abortion and fetal death. Accordingly, I think the following guidelines are a reasonable approach to a pregnant patient who has been exposed to monkeypox or who has developed manifestations of infection.3,7,9

  • In the event of a community outbreak, bioterrorism event, or exposure to a person with suspected or confirmed monkeypox infection, the pregnant patient should receive the Jynneos vaccine.
  • The pregnant patient should be isolated from any individual with suspected or confirmed monkeypox.
  • If infection develops despite these measures, the patient should be treated with either tecovirimat or vaccinia immune globulin IV. Hospitalization may be necessary for seriously ill individuals.
  • Within 2 weeks of infection, a comprehensive ultrasound examination should be performed to assess for structural abnormalities in the fetus.
  • Subsequently, serial ultrasound examinations should be performed at intervals of 4-6 weeks to assess fetal growth and re-evaluate fetal anatomy.
  • Following delivery, a detailed neonatal examination should be performed to assess for evidence of viral injury. Neonatal skin lesions and neonatal serum can be assessed by PCR for monkeypox virus. The newborn should be isolated from the mother until all the mother’s lesions have dried and crusted over.

CASE Resolved

Given the husband’s recent travel to Nigeria and consumption of bushmeat, he most likely has monkeypox. The infection can be spread from person to person by close contact; thus, his wife is at risk. The couple should isolate until all of his lesions have dried and crusted over. The woman also should receive the Jynneos vaccine. If she becomes symptomatic, she should be treated with tecovirimat or vaccinia immune globulin IV. ●

References
  1. Isaacs SN, Shenoy ES. Monkeypox. UpToDate. Updated June 28,2022. Accessed July 1, 2022. https://www.uptodate.com /contents/monkeypox?topicRef=8349&source=see_link
  2. Graham MB. Monkeypox. Medscape. Updated June 29, 2022. Accessed July 1, 2022. https://emedicine.medscape.com /article/1134714-overview.
  3. Khalil A, Samara A, O’Brien P, et al. Monkeypox and pregnancy: what do obstetricians need to know? Ultrasound Obstet Gynecol. 2022;60:22-27. doi:10.1002/uog.24968.
  4. World Health Organization. Monkeypox-United Kingdom of Great Britain and Northern Ireland. May 18, 2022. Accessed July 1, 2022. https://www.who.int/emergencies/diseaseoutbreak-news/item/2022-DON383.
  5. WHO reports two new monkeypox deaths, cases in new areas. Reuters. July 7, 2022. https://www.reuters.com/world /who-reports-two-new-monkeypox-deaths-2022-07-07/. Accessed July 19, 2022.
  6. World Health Organization. Multi-country monkeypox outbreak in non-endemic countries: update. May 29, 2022. Accessed July 1, 2022. https://www.who.int /emergencies/disease-outbreak-news/item/2022 -DON388#:~:text=Multi%2Dcountry%20monkeypox%20 outbreak%20in%20non%2Dendemic%20countries%3A%20 Update,-29%20May%202022&text=Since%2013%20 May%202022%2C%20monkeypox,Epidemiological%20 investigations%20are%20ongoing.
  7. Cono J, Cragan JD, Jamieson DJ, Rasmussen SA. Prophylaxis and treatment of pregnant women for emerging infections andbioterrorism emergencies. Emerg Infect Dis. 2006;12:16311637. doi:10.3201/eid1211.060618.
  8. Centers for Disease Control and Prevention. Preparation and collection of specimens. Reviewed June 29, 2022. Accessed July 6, 2022. https://www.cdc.gov/poxvirus /monkeypox/clinicians/prep-collection-specimens.html.
  9. Rao AK, Petersen BW, Whitehill F, et al. Monkeypox vaccination. MMWR Morb Mortal Wkly Rep. 2022;71:734-742. doi:10.15585/mmwr.mm7122e1.
  10. Smallpox and monkeypox vaccine, live, nonreplicating. Package insert. Bavarian Nordic A/S; 2021. Accessed July 1, 2022. https://www.fda.gov/media/131078/download.
  11. Duff P. Commonly used antibiotics in ObGyn practice. OBG Manag. 2022;34:29, 36-40. doi:10.12788/obgm.0191.
  12. Centers for Disease Control and Prevention. Treatment information for healthcare professionals: interim clinical guidance for the treatment of monkeypox. Reviewed June 17, 2022. Accessed July 1, 2022. https://www.cdc.gov/poxvirus /monkeypox/clinicians/treatment.html.
  13. Brincidofovir. Prescribing information. Chimerix, Inc.; 2021. Accessed July 1, 2022. https://www.accessdata.fda.gov /drugsatfda_docs/label/2021/214460s000,214461s000lbl.pdf.
  14. Cidofovir. Package insert. Gilead Sciences, Inc.; 2010. Accessed July 1, 2022. https://www.gilead.com/~/media /Files/pdfs/medicines/other/vistide/vistide.pdf.
  15. Tecovirimat. Prescribing information. Catalent Pharma Solutions; 2022. Accessed July 1, 2022. https://www.accessdata.fda.gov/drugsatfda_docs /label/2022/214518s000lbl.pdf.
  16. Vaccinia immune globulin IV. Prescribing information. Cangene Corporation; 2010. Accessed July 1, 2022. https: //www.fda.gov/media/77004/download.
  17. Mbala PK, Huggins JW, Riu-Rovira T, et al. Maternal and fetal outcomes among pregnant women with human monkeypox infection in the Democratic Republic of Congo.  J Infect Dis. 2017;216:824-828. doi:10.1093/infdis/jix260.
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CASE Pregnant woman’s husband is ill after traveling

A 29-year-old primigravid woman at 18 weeks’ gestation just returned from a 10-day trip to Nigeria with her husband. While in Nigeria, the couple went on safari. On several occasions during the safari, they consumed bushmeat prepared by their guides. Her husband now has severe malaise, fever, chills, myalgias, cough, and prominent submandibular, cervical, and inguinal adenopathy. In addition, he has developed a diffuse papular-vesicular rash on his trunk and extremities.

  • What is the most likely diagnosis?
  • Does this condition pose a danger to his wife?
  • What treatment is indicated for his wife?

What we know

In recent weeks, the specter of another poorly understood biological threat has emerged in the medical literature and lay press: monkeypox. This article will first review the epidemiology, clinical manifestations, and diagnosis of this infection, followed by a discussion of how to prevent and treat the condition, with special emphasis on the risks that this infection poses in pregnant women.

 

Virology

The monkeypox virus is a member of the orthopoxvirus genus. The variola (smallpox) virus and vaccinia virus are included in this genus. It is one of the largest of all viruses, measuring 200-250 nm. It is enveloped and contains double-stranded DNA. Its natural reservoir is probably African rodents. Two distinct strains of monkeypox exist in different geographical regions of Africa: the Central African clade and the West African clade. The Central African clade is significantly more virulent than the latter, with a mortality rate approaching 10%, versus 1% in the West African clade. The incubation period of the virus ranges from 4-20 days and averages 12 days.1,2

Epidemiology

Monkeypox was first discovered in 1958 by Preben von Magnus in a colony of research monkeys in Copenhagen, Denmark. The first case of monkeypox in humans occurred in the Democratic Republic of Congo in 1970 in a 9-year-old boy. Subsequently, cases were reported in the Ivory Coast, Liberia, Nigeria, and Sierra Leone. The infection was limited to the rain forests of central and western Africa until 2003. At that time, the first cases in the United States were reported. The US cases occurred in the Midwest and were traced to exposure to pet prairie dogs. These animals all came from a single distributor, and they apparently were infected when they were housed in the same space with Gambian rats, which are well recognized reservoirs of monkeypox in their native habitat in Africa.1-3

A limited outbreak of monkeypox occurred in the United Kingdom in 2018. Seventy-one cases, with no fatalities, were reported. In 2021 another US case of monkeypox was reported in Dallas, Texas, in an individual who had recently traveled to the United States from Nigeria. A second US case was reported in November 2021 from a patient in Maryland who had returned from a visit to Nigeria. Those were the only 2 reported cases of monkeypox in the United States in 2021.1-3

Then in early May 2022, the United Kingdom reported 9 cases of monkeypox. The first infected patient had recently traveled to Nigeria and, subsequently, infected 2 members of his family.4 On May 18, the Massachusetts Department of Public Health confirmed a case of monkeypox in an adult man who had recently traveled to Canada. As of July 7, 6,027 cases have been reported from at least 39 countries.5 Eight states in the United States reported cases. To date, 73 deaths have occurred in this recent outbreak of infections (case fatality rate, 4.5%).4-6

The current outbreak is unusual in that, previously, almost all cases occurred in western and central Africa in remote tropical rain forests. Infection usually resulted from close exposure to rats, rabbits, squirrels, monkeys, porcupines, and gazelles. Exposure occurred when persons captured, slaughtered, prepared, and then ate these animals for food without properly cooking the flesh.

The leading theory is that the present outbreak originated among men who had sex with men at 2 raves held in Spain and Belgium. The virus appears to have been spread by skin-to-skin contact, by respiratory droplets, by contact with contaminated bedding, and probably by sperm.2,4,6

Continue to: Clinical manifestations...

 

 

Clinical manifestations

Monkeypox evolves through 2 stages: a pre-eruptive stage and an eruptive stage. Prodromal symptoms include malaise, severe headache, myalgias, fever, drenching sweats, backache, fatigue, sore throat, dyspnea, and cough. Within 2-3 days, the characteristic skin eruption develops. The lesions usually begin on the face and then spread in a centrifugal manner to the trunk and extremities, including the palms of the hands and soles of the feet. The lesions typically progress from macules to papules to vesicles to pustules. They then crust and scab over. An interesting additional finding is the presence of prominent lymphadenopathy behind the ear, beneath the mandible, in the neck, and in the groin.1

Several different illnesses must be considered in the differential diagnosis of monkeypox infection. They include measles, scabies, secondary syphilis, and medication-associated allergic reactions. However, the 2 conditions most likely to be confused with monkeypox are chickenpox (varicella) and smallpox. Lymphadenopathy is much more prominent in monkeypox compared with chickenpox. Moreover, with monkeypox, all lesions tend to be at the same stage of evolution as opposed to appearing in crops as they do in chickenpox. Smallpox would be extremely unlikely in the absence of a recognized laboratory accident or a bioterrorism incident.7

 

Diagnosis

The presumptive diagnosis of monkeypox infection is made primarily based on clinical examination. However, laboratory testing is indicated to definitively differentiate monkeypox from other orthopoxvirus infections such as varicella and smallpox.

In specialized laboratories that employ highly trained personnel and maintain strict safety precautions, the virus can be isolated in mammalian cell cultures. Electron microscopy is a valuable tool for identifying the characteristic brick-shaped poxvirus virions. Routine histologic examination of a lesion will show ballooning degeneration of keratinocytes, prominent spongiosis, dermal edema, and acute inflammation, although these findings are not unique to monkeypox.1

The Centers for Disease Control and Prevention (CDC) has developed serologic tests that detect immunoglobulin (Ig) M- and IgG-specific antibody. However, the most useful and practical diagnostic test is assessment of a skin scraping by polymerase chain reaction (PCR). This test is more sensitive than assessment of serum PCR.1

When the diagnosis of monkeypox is being considered, the clinician should coordinate testing through the local and state public health departments and through the CDC. Effective communication with all agencies will ensure that laboratory specimens are processed in a timely and efficient manner. The CDC website presents information on specimen collection.8

How do we manage monkeypox?

Prevention

The first step in prevention of infection is to isolate infected individuals until all lesions have dried and crusted over. Susceptible people should avoid close contact with skin lesions, respiratory and genital secretions, and bedding of patients who are infected.

The ultimate preventive measure, however, is vaccination of susceptible people either immediately before exposure (eg, military personnel, first responders, infection control investigators, health care workers) or immediately after exposure (general population). Older individuals who received the original smallpox vaccine likely have immunity to monkeypox infection. Unfortunately, very few women who currently are of reproductive age received this vaccine because its use was discontinued in the United States in the early 1970s. Therefore, the vast majority of our patients are uniquely susceptible to this infection and should be vaccinated if there is an outbreak of monkeypox in their locality.7,9

The current preferred vaccine for prevention of both smallpox and monkeypox is the Jynneos (Bavarian Nordic A/S) vaccine.10 This agent incorporates a replication-deficient live virus and does not pose the same risk for adverse events as the original versions of the smallpox vaccine. Jynneos is administered subcutaneously rather than by scarification. Two 0.5-mL doses, delivered 28 days apart, are required for optimal effect. The vaccine must be obtained from local and state health departments, in consultation with the CDC.7,9

There is very little published information on the safety of the Jynneos vaccine in pregnant or lactating women, although animal data are reassuring. Moreover, the dangers of monkeypox infection are significant, and in the event of an outbreak, vaccination of susceptible individuals, including pregnant women, is indicated.

Key points at a glance
  • Monkeypox is a member of the orthopoxvirus genus and is closely related to the smallpox virus. It is a large, double-stranded, enveloped DNA virus.
  • The virus is transmitted primarily by close contact with infected animals or other humans or by consumption of contaminated bushmeat.
  • The infection evolves in 2 phases. The pre-eruptive phase is characterized by severe flu-like symptoms and signs. The eruptive phase is distinguished by a diffuse papular-vesicular rash.
  • The most valuable test for confirming the diagnosis is a polymerase chain reaction test of a fresh skin lesion.
  • In women who are pregnant, monkeypox has been associated with spontaneous abortion and fetal death.
  • Three antiviral agents may be of value in treating infected patients: cidofovir, brincidofovir, and tecovirimat. Only the latter has an acceptable safety profile for women who are pregnant or lactating.
  • The new nonreplicating smallpox vaccine Jynneos (Bavarian Nordic A/S) is of great value for pre- and post-exposure prophylaxis.

Continue to: Treatment...

 

 

Treatment

Infected pregnant women should receive acetaminophen 1,000 mg orally every 8 hours, to control fever and provide analgesia. An antihistamine such as diphenhydramine 25 mg orally every 6-8 hours, may be used to control pruritus and provide mild sedation. Adequate fluid intake and optimal nutrition should be encouraged. Skin lesions should be inspected regularly to detect signs of superimposed bacterial infections. Small, localized bacterial skin infections can be treated with topical application of mupirocin ointment 2%, 3 times daily for 7-14 days. For diffuse and more severe bacterial skin infections, a systemic antibiotic may be necessary. Reasonable choices include amoxicillin-clavulanate 875 mg/125 mg orally every 12 hours, or trimethoprim-sulfamethoxazole double strength 800 mg/160 mg orally every 12 hours.11 The latter agent should be avoided in the first trimester of pregnancy because of potential teratogenic effects.

Several specific agents are available through the CDC for treatment of orthopoxvirus infections such as smallpox and monkeypox. Information about these agents is summarized in the TABLE.12-16

 

Unique considerations in pregnancy

Because monkeypox is so rare, there is very little information about the effects of this infection in pregnant women. The report most commonly cited in the literature is that by Mbala et al, which was published in 2017.17 These authors described 4 pregnant patients in the Democratic Republic of Congo who contracted monkeypox infection over a 4-year period. All 4 women were hospitalized and treated with systemic antibiotics, antiparasitic medications, and analgesics. One patient delivered a healthy infant. Two women had spontaneous abortions in the first trimester. The fourth patient experienced a stillbirth at 22 weeks’ gestation. At postmortem examination, the fetus had diffuse cutaneous lesions, prominent hepatomegaly, and hydrops. No structural malformations were noted. The placenta demonstrated numerous punctate hemorrhages, and high concentrations of virus were recovered from the placenta and from fetal tissue.

Although the information on pregnancy outcome is quite limited, it seems clear that the virus can cross the placenta and cause adverse effects such as spontaneous abortion and fetal death. Accordingly, I think the following guidelines are a reasonable approach to a pregnant patient who has been exposed to monkeypox or who has developed manifestations of infection.3,7,9

  • In the event of a community outbreak, bioterrorism event, or exposure to a person with suspected or confirmed monkeypox infection, the pregnant patient should receive the Jynneos vaccine.
  • The pregnant patient should be isolated from any individual with suspected or confirmed monkeypox.
  • If infection develops despite these measures, the patient should be treated with either tecovirimat or vaccinia immune globulin IV. Hospitalization may be necessary for seriously ill individuals.
  • Within 2 weeks of infection, a comprehensive ultrasound examination should be performed to assess for structural abnormalities in the fetus.
  • Subsequently, serial ultrasound examinations should be performed at intervals of 4-6 weeks to assess fetal growth and re-evaluate fetal anatomy.
  • Following delivery, a detailed neonatal examination should be performed to assess for evidence of viral injury. Neonatal skin lesions and neonatal serum can be assessed by PCR for monkeypox virus. The newborn should be isolated from the mother until all the mother’s lesions have dried and crusted over.

CASE Resolved

Given the husband’s recent travel to Nigeria and consumption of bushmeat, he most likely has monkeypox. The infection can be spread from person to person by close contact; thus, his wife is at risk. The couple should isolate until all of his lesions have dried and crusted over. The woman also should receive the Jynneos vaccine. If she becomes symptomatic, she should be treated with tecovirimat or vaccinia immune globulin IV. ●

 

 

CASE Pregnant woman’s husband is ill after traveling

A 29-year-old primigravid woman at 18 weeks’ gestation just returned from a 10-day trip to Nigeria with her husband. While in Nigeria, the couple went on safari. On several occasions during the safari, they consumed bushmeat prepared by their guides. Her husband now has severe malaise, fever, chills, myalgias, cough, and prominent submandibular, cervical, and inguinal adenopathy. In addition, he has developed a diffuse papular-vesicular rash on his trunk and extremities.

  • What is the most likely diagnosis?
  • Does this condition pose a danger to his wife?
  • What treatment is indicated for his wife?

What we know

In recent weeks, the specter of another poorly understood biological threat has emerged in the medical literature and lay press: monkeypox. This article will first review the epidemiology, clinical manifestations, and diagnosis of this infection, followed by a discussion of how to prevent and treat the condition, with special emphasis on the risks that this infection poses in pregnant women.

 

Virology

The monkeypox virus is a member of the orthopoxvirus genus. The variola (smallpox) virus and vaccinia virus are included in this genus. It is one of the largest of all viruses, measuring 200-250 nm. It is enveloped and contains double-stranded DNA. Its natural reservoir is probably African rodents. Two distinct strains of monkeypox exist in different geographical regions of Africa: the Central African clade and the West African clade. The Central African clade is significantly more virulent than the latter, with a mortality rate approaching 10%, versus 1% in the West African clade. The incubation period of the virus ranges from 4-20 days and averages 12 days.1,2

Epidemiology

Monkeypox was first discovered in 1958 by Preben von Magnus in a colony of research monkeys in Copenhagen, Denmark. The first case of monkeypox in humans occurred in the Democratic Republic of Congo in 1970 in a 9-year-old boy. Subsequently, cases were reported in the Ivory Coast, Liberia, Nigeria, and Sierra Leone. The infection was limited to the rain forests of central and western Africa until 2003. At that time, the first cases in the United States were reported. The US cases occurred in the Midwest and were traced to exposure to pet prairie dogs. These animals all came from a single distributor, and they apparently were infected when they were housed in the same space with Gambian rats, which are well recognized reservoirs of monkeypox in their native habitat in Africa.1-3

A limited outbreak of monkeypox occurred in the United Kingdom in 2018. Seventy-one cases, with no fatalities, were reported. In 2021 another US case of monkeypox was reported in Dallas, Texas, in an individual who had recently traveled to the United States from Nigeria. A second US case was reported in November 2021 from a patient in Maryland who had returned from a visit to Nigeria. Those were the only 2 reported cases of monkeypox in the United States in 2021.1-3

Then in early May 2022, the United Kingdom reported 9 cases of monkeypox. The first infected patient had recently traveled to Nigeria and, subsequently, infected 2 members of his family.4 On May 18, the Massachusetts Department of Public Health confirmed a case of monkeypox in an adult man who had recently traveled to Canada. As of July 7, 6,027 cases have been reported from at least 39 countries.5 Eight states in the United States reported cases. To date, 73 deaths have occurred in this recent outbreak of infections (case fatality rate, 4.5%).4-6

The current outbreak is unusual in that, previously, almost all cases occurred in western and central Africa in remote tropical rain forests. Infection usually resulted from close exposure to rats, rabbits, squirrels, monkeys, porcupines, and gazelles. Exposure occurred when persons captured, slaughtered, prepared, and then ate these animals for food without properly cooking the flesh.

The leading theory is that the present outbreak originated among men who had sex with men at 2 raves held in Spain and Belgium. The virus appears to have been spread by skin-to-skin contact, by respiratory droplets, by contact with contaminated bedding, and probably by sperm.2,4,6

Continue to: Clinical manifestations...

 

 

Clinical manifestations

Monkeypox evolves through 2 stages: a pre-eruptive stage and an eruptive stage. Prodromal symptoms include malaise, severe headache, myalgias, fever, drenching sweats, backache, fatigue, sore throat, dyspnea, and cough. Within 2-3 days, the characteristic skin eruption develops. The lesions usually begin on the face and then spread in a centrifugal manner to the trunk and extremities, including the palms of the hands and soles of the feet. The lesions typically progress from macules to papules to vesicles to pustules. They then crust and scab over. An interesting additional finding is the presence of prominent lymphadenopathy behind the ear, beneath the mandible, in the neck, and in the groin.1

Several different illnesses must be considered in the differential diagnosis of monkeypox infection. They include measles, scabies, secondary syphilis, and medication-associated allergic reactions. However, the 2 conditions most likely to be confused with monkeypox are chickenpox (varicella) and smallpox. Lymphadenopathy is much more prominent in monkeypox compared with chickenpox. Moreover, with monkeypox, all lesions tend to be at the same stage of evolution as opposed to appearing in crops as they do in chickenpox. Smallpox would be extremely unlikely in the absence of a recognized laboratory accident or a bioterrorism incident.7

 

Diagnosis

The presumptive diagnosis of monkeypox infection is made primarily based on clinical examination. However, laboratory testing is indicated to definitively differentiate monkeypox from other orthopoxvirus infections such as varicella and smallpox.

In specialized laboratories that employ highly trained personnel and maintain strict safety precautions, the virus can be isolated in mammalian cell cultures. Electron microscopy is a valuable tool for identifying the characteristic brick-shaped poxvirus virions. Routine histologic examination of a lesion will show ballooning degeneration of keratinocytes, prominent spongiosis, dermal edema, and acute inflammation, although these findings are not unique to monkeypox.1

The Centers for Disease Control and Prevention (CDC) has developed serologic tests that detect immunoglobulin (Ig) M- and IgG-specific antibody. However, the most useful and practical diagnostic test is assessment of a skin scraping by polymerase chain reaction (PCR). This test is more sensitive than assessment of serum PCR.1

When the diagnosis of monkeypox is being considered, the clinician should coordinate testing through the local and state public health departments and through the CDC. Effective communication with all agencies will ensure that laboratory specimens are processed in a timely and efficient manner. The CDC website presents information on specimen collection.8

How do we manage monkeypox?

Prevention

The first step in prevention of infection is to isolate infected individuals until all lesions have dried and crusted over. Susceptible people should avoid close contact with skin lesions, respiratory and genital secretions, and bedding of patients who are infected.

The ultimate preventive measure, however, is vaccination of susceptible people either immediately before exposure (eg, military personnel, first responders, infection control investigators, health care workers) or immediately after exposure (general population). Older individuals who received the original smallpox vaccine likely have immunity to monkeypox infection. Unfortunately, very few women who currently are of reproductive age received this vaccine because its use was discontinued in the United States in the early 1970s. Therefore, the vast majority of our patients are uniquely susceptible to this infection and should be vaccinated if there is an outbreak of monkeypox in their locality.7,9

The current preferred vaccine for prevention of both smallpox and monkeypox is the Jynneos (Bavarian Nordic A/S) vaccine.10 This agent incorporates a replication-deficient live virus and does not pose the same risk for adverse events as the original versions of the smallpox vaccine. Jynneos is administered subcutaneously rather than by scarification. Two 0.5-mL doses, delivered 28 days apart, are required for optimal effect. The vaccine must be obtained from local and state health departments, in consultation with the CDC.7,9

There is very little published information on the safety of the Jynneos vaccine in pregnant or lactating women, although animal data are reassuring. Moreover, the dangers of monkeypox infection are significant, and in the event of an outbreak, vaccination of susceptible individuals, including pregnant women, is indicated.

Key points at a glance
  • Monkeypox is a member of the orthopoxvirus genus and is closely related to the smallpox virus. It is a large, double-stranded, enveloped DNA virus.
  • The virus is transmitted primarily by close contact with infected animals or other humans or by consumption of contaminated bushmeat.
  • The infection evolves in 2 phases. The pre-eruptive phase is characterized by severe flu-like symptoms and signs. The eruptive phase is distinguished by a diffuse papular-vesicular rash.
  • The most valuable test for confirming the diagnosis is a polymerase chain reaction test of a fresh skin lesion.
  • In women who are pregnant, monkeypox has been associated with spontaneous abortion and fetal death.
  • Three antiviral agents may be of value in treating infected patients: cidofovir, brincidofovir, and tecovirimat. Only the latter has an acceptable safety profile for women who are pregnant or lactating.
  • The new nonreplicating smallpox vaccine Jynneos (Bavarian Nordic A/S) is of great value for pre- and post-exposure prophylaxis.

Continue to: Treatment...

 

 

Treatment

Infected pregnant women should receive acetaminophen 1,000 mg orally every 8 hours, to control fever and provide analgesia. An antihistamine such as diphenhydramine 25 mg orally every 6-8 hours, may be used to control pruritus and provide mild sedation. Adequate fluid intake and optimal nutrition should be encouraged. Skin lesions should be inspected regularly to detect signs of superimposed bacterial infections. Small, localized bacterial skin infections can be treated with topical application of mupirocin ointment 2%, 3 times daily for 7-14 days. For diffuse and more severe bacterial skin infections, a systemic antibiotic may be necessary. Reasonable choices include amoxicillin-clavulanate 875 mg/125 mg orally every 12 hours, or trimethoprim-sulfamethoxazole double strength 800 mg/160 mg orally every 12 hours.11 The latter agent should be avoided in the first trimester of pregnancy because of potential teratogenic effects.

Several specific agents are available through the CDC for treatment of orthopoxvirus infections such as smallpox and monkeypox. Information about these agents is summarized in the TABLE.12-16

 

Unique considerations in pregnancy

Because monkeypox is so rare, there is very little information about the effects of this infection in pregnant women. The report most commonly cited in the literature is that by Mbala et al, which was published in 2017.17 These authors described 4 pregnant patients in the Democratic Republic of Congo who contracted monkeypox infection over a 4-year period. All 4 women were hospitalized and treated with systemic antibiotics, antiparasitic medications, and analgesics. One patient delivered a healthy infant. Two women had spontaneous abortions in the first trimester. The fourth patient experienced a stillbirth at 22 weeks’ gestation. At postmortem examination, the fetus had diffuse cutaneous lesions, prominent hepatomegaly, and hydrops. No structural malformations were noted. The placenta demonstrated numerous punctate hemorrhages, and high concentrations of virus were recovered from the placenta and from fetal tissue.

Although the information on pregnancy outcome is quite limited, it seems clear that the virus can cross the placenta and cause adverse effects such as spontaneous abortion and fetal death. Accordingly, I think the following guidelines are a reasonable approach to a pregnant patient who has been exposed to monkeypox or who has developed manifestations of infection.3,7,9

  • In the event of a community outbreak, bioterrorism event, or exposure to a person with suspected or confirmed monkeypox infection, the pregnant patient should receive the Jynneos vaccine.
  • The pregnant patient should be isolated from any individual with suspected or confirmed monkeypox.
  • If infection develops despite these measures, the patient should be treated with either tecovirimat or vaccinia immune globulin IV. Hospitalization may be necessary for seriously ill individuals.
  • Within 2 weeks of infection, a comprehensive ultrasound examination should be performed to assess for structural abnormalities in the fetus.
  • Subsequently, serial ultrasound examinations should be performed at intervals of 4-6 weeks to assess fetal growth and re-evaluate fetal anatomy.
  • Following delivery, a detailed neonatal examination should be performed to assess for evidence of viral injury. Neonatal skin lesions and neonatal serum can be assessed by PCR for monkeypox virus. The newborn should be isolated from the mother until all the mother’s lesions have dried and crusted over.

CASE Resolved

Given the husband’s recent travel to Nigeria and consumption of bushmeat, he most likely has monkeypox. The infection can be spread from person to person by close contact; thus, his wife is at risk. The couple should isolate until all of his lesions have dried and crusted over. The woman also should receive the Jynneos vaccine. If she becomes symptomatic, she should be treated with tecovirimat or vaccinia immune globulin IV. ●

References
  1. Isaacs SN, Shenoy ES. Monkeypox. UpToDate. Updated June 28,2022. Accessed July 1, 2022. https://www.uptodate.com /contents/monkeypox?topicRef=8349&source=see_link
  2. Graham MB. Monkeypox. Medscape. Updated June 29, 2022. Accessed July 1, 2022. https://emedicine.medscape.com /article/1134714-overview.
  3. Khalil A, Samara A, O’Brien P, et al. Monkeypox and pregnancy: what do obstetricians need to know? Ultrasound Obstet Gynecol. 2022;60:22-27. doi:10.1002/uog.24968.
  4. World Health Organization. Monkeypox-United Kingdom of Great Britain and Northern Ireland. May 18, 2022. Accessed July 1, 2022. https://www.who.int/emergencies/diseaseoutbreak-news/item/2022-DON383.
  5. WHO reports two new monkeypox deaths, cases in new areas. Reuters. July 7, 2022. https://www.reuters.com/world /who-reports-two-new-monkeypox-deaths-2022-07-07/. Accessed July 19, 2022.
  6. World Health Organization. Multi-country monkeypox outbreak in non-endemic countries: update. May 29, 2022. Accessed July 1, 2022. https://www.who.int /emergencies/disease-outbreak-news/item/2022 -DON388#:~:text=Multi%2Dcountry%20monkeypox%20 outbreak%20in%20non%2Dendemic%20countries%3A%20 Update,-29%20May%202022&text=Since%2013%20 May%202022%2C%20monkeypox,Epidemiological%20 investigations%20are%20ongoing.
  7. Cono J, Cragan JD, Jamieson DJ, Rasmussen SA. Prophylaxis and treatment of pregnant women for emerging infections andbioterrorism emergencies. Emerg Infect Dis. 2006;12:16311637. doi:10.3201/eid1211.060618.
  8. Centers for Disease Control and Prevention. Preparation and collection of specimens. Reviewed June 29, 2022. Accessed July 6, 2022. https://www.cdc.gov/poxvirus /monkeypox/clinicians/prep-collection-specimens.html.
  9. Rao AK, Petersen BW, Whitehill F, et al. Monkeypox vaccination. MMWR Morb Mortal Wkly Rep. 2022;71:734-742. doi:10.15585/mmwr.mm7122e1.
  10. Smallpox and monkeypox vaccine, live, nonreplicating. Package insert. Bavarian Nordic A/S; 2021. Accessed July 1, 2022. https://www.fda.gov/media/131078/download.
  11. Duff P. Commonly used antibiotics in ObGyn practice. OBG Manag. 2022;34:29, 36-40. doi:10.12788/obgm.0191.
  12. Centers for Disease Control and Prevention. Treatment information for healthcare professionals: interim clinical guidance for the treatment of monkeypox. Reviewed June 17, 2022. Accessed July 1, 2022. https://www.cdc.gov/poxvirus /monkeypox/clinicians/treatment.html.
  13. Brincidofovir. Prescribing information. Chimerix, Inc.; 2021. Accessed July 1, 2022. https://www.accessdata.fda.gov /drugsatfda_docs/label/2021/214460s000,214461s000lbl.pdf.
  14. Cidofovir. Package insert. Gilead Sciences, Inc.; 2010. Accessed July 1, 2022. https://www.gilead.com/~/media /Files/pdfs/medicines/other/vistide/vistide.pdf.
  15. Tecovirimat. Prescribing information. Catalent Pharma Solutions; 2022. Accessed July 1, 2022. https://www.accessdata.fda.gov/drugsatfda_docs /label/2022/214518s000lbl.pdf.
  16. Vaccinia immune globulin IV. Prescribing information. Cangene Corporation; 2010. Accessed July 1, 2022. https: //www.fda.gov/media/77004/download.
  17. Mbala PK, Huggins JW, Riu-Rovira T, et al. Maternal and fetal outcomes among pregnant women with human monkeypox infection in the Democratic Republic of Congo.  J Infect Dis. 2017;216:824-828. doi:10.1093/infdis/jix260.
References
  1. Isaacs SN, Shenoy ES. Monkeypox. UpToDate. Updated June 28,2022. Accessed July 1, 2022. https://www.uptodate.com /contents/monkeypox?topicRef=8349&source=see_link
  2. Graham MB. Monkeypox. Medscape. Updated June 29, 2022. Accessed July 1, 2022. https://emedicine.medscape.com /article/1134714-overview.
  3. Khalil A, Samara A, O’Brien P, et al. Monkeypox and pregnancy: what do obstetricians need to know? Ultrasound Obstet Gynecol. 2022;60:22-27. doi:10.1002/uog.24968.
  4. World Health Organization. Monkeypox-United Kingdom of Great Britain and Northern Ireland. May 18, 2022. Accessed July 1, 2022. https://www.who.int/emergencies/diseaseoutbreak-news/item/2022-DON383.
  5. WHO reports two new monkeypox deaths, cases in new areas. Reuters. July 7, 2022. https://www.reuters.com/world /who-reports-two-new-monkeypox-deaths-2022-07-07/. Accessed July 19, 2022.
  6. World Health Organization. Multi-country monkeypox outbreak in non-endemic countries: update. May 29, 2022. Accessed July 1, 2022. https://www.who.int /emergencies/disease-outbreak-news/item/2022 -DON388#:~:text=Multi%2Dcountry%20monkeypox%20 outbreak%20in%20non%2Dendemic%20countries%3A%20 Update,-29%20May%202022&text=Since%2013%20 May%202022%2C%20monkeypox,Epidemiological%20 investigations%20are%20ongoing.
  7. Cono J, Cragan JD, Jamieson DJ, Rasmussen SA. Prophylaxis and treatment of pregnant women for emerging infections andbioterrorism emergencies. Emerg Infect Dis. 2006;12:16311637. doi:10.3201/eid1211.060618.
  8. Centers for Disease Control and Prevention. Preparation and collection of specimens. Reviewed June 29, 2022. Accessed July 6, 2022. https://www.cdc.gov/poxvirus /monkeypox/clinicians/prep-collection-specimens.html.
  9. Rao AK, Petersen BW, Whitehill F, et al. Monkeypox vaccination. MMWR Morb Mortal Wkly Rep. 2022;71:734-742. doi:10.15585/mmwr.mm7122e1.
  10. Smallpox and monkeypox vaccine, live, nonreplicating. Package insert. Bavarian Nordic A/S; 2021. Accessed July 1, 2022. https://www.fda.gov/media/131078/download.
  11. Duff P. Commonly used antibiotics in ObGyn practice. OBG Manag. 2022;34:29, 36-40. doi:10.12788/obgm.0191.
  12. Centers for Disease Control and Prevention. Treatment information for healthcare professionals: interim clinical guidance for the treatment of monkeypox. Reviewed June 17, 2022. Accessed July 1, 2022. https://www.cdc.gov/poxvirus /monkeypox/clinicians/treatment.html.
  13. Brincidofovir. Prescribing information. Chimerix, Inc.; 2021. Accessed July 1, 2022. https://www.accessdata.fda.gov /drugsatfda_docs/label/2021/214460s000,214461s000lbl.pdf.
  14. Cidofovir. Package insert. Gilead Sciences, Inc.; 2010. Accessed July 1, 2022. https://www.gilead.com/~/media /Files/pdfs/medicines/other/vistide/vistide.pdf.
  15. Tecovirimat. Prescribing information. Catalent Pharma Solutions; 2022. Accessed July 1, 2022. https://www.accessdata.fda.gov/drugsatfda_docs /label/2022/214518s000lbl.pdf.
  16. Vaccinia immune globulin IV. Prescribing information. Cangene Corporation; 2010. Accessed July 1, 2022. https: //www.fda.gov/media/77004/download.
  17. Mbala PK, Huggins JW, Riu-Rovira T, et al. Maternal and fetal outcomes among pregnant women with human monkeypox infection in the Democratic Republic of Congo.  J Infect Dis. 2017;216:824-828. doi:10.1093/infdis/jix260.
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Medical assistants identify strategies and barriers to clinic efficiency

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ABSTRACT

Background: Medical assistant (MA) roles have expanded rapidly as primary care has evolved and MAs take on new patient care duties. Research that looks at the MA experience and factors that enhance or reduce efficiency among MAs is limited.

Methods: We surveyed all MAs working in 6 clinics run by a large academic family medicine department in Ann Arbor, Michigan. MAs deemed by peers as “most efficient” were selected for follow-up interviews. We evaluated personal strategies for efficiency, barriers to efficient care, impact of physician actions on efficiency, and satisfaction.

Results: A total of 75/86 MAs (87%) responded to at least some survey questions and 61/86 (71%) completed the full survey. We interviewed 18 MAs face to face. Most saw their role as essential to clinic functioning and viewed health care as a personal calling. MAs identified common strategies to improve efficiency and described the MA role to orchestrate the flow of the clinic day. Staff recognized differing priorities of patients, staff, and physicians and articulated frustrations with hierarchy and competing priorities as well as behaviors that impeded clinic efficiency. Respondents emphasized the importance of feeling valued by others on their team.

Conclusions: With the evolving demands made on MAs’ time, it is critical to understand how the most effective staff members manage their role and highlight the strategies they employ to provide efficient clinical care. Understanding factors that increase or decrease MA job satisfaction can help identify high-efficiency practices and promote a clinic culture that values and supports all staff.

As primary care continues to evolve into more team-based practice, the role of the medical assistant (MA) has rapidly transformed.1 Staff may assist with patient management, documentation in the electronic medical record, order entry, pre-visit planning, and fulfillment of quality metrics, particularly in a Primary Care Medical Home (PCMH).2 From 2012 through 2014, MA job postings per graduate increased from 1.3 to 2.3, suggesting twice as many job postings as graduates.3 As the demand for experienced MAs increases, the ability to recruit and retain high-performing staff members will be critical.

MAs are referenced in medical literature as early as the 1800s.4 The American Association of Medical Assistants was founded in 1956, which led to educational standardization and certifications.5 Despite the important role that MAs have long played in the proper functioning of a medical clinic—and the knowledge that team configurations impact a clinic’s efficiency and quality6,7—few investigations have sought out the MA’s perspective.8,9 Given the increasing clinical demands placed on all members of the primary care team (and the burnout that often results), it seems that MA insights into clinic efficiency could be valuable.

Continue to: Methods...

 

 

METHODS

This cross-sectional study was conducted from February to April 2019 at a large academic institution with 6 regional ambulatory care family medicine clinics, each one with 11,000 to 18,000 patient visits annually. Faculty work at all 6 clinics and residents at 2 of them. All MAs are hired, paid, and managed by a central administrative department rather than by the family medicine department. The family medicine clinics are currently PCMH certified, with a mix of fee-for-service and capitated reimbursement.

We developed and piloted a voluntary, anonymous 39-question (29 closed-ended and 10 brief open-ended) online Qualtrics survey, which we distributed via an email link to all the MAs in the department. The survey included clinic site, years as an MA, perceptions of the clinic environment, perception of teamwork at their site, identification of efficient practices, and feedback for physicians to improve efficiency and flow. Most questions were Likert-style with 5 choices ranging from “strongly agree” to “strongly disagree” or short answer. Age and gender were omitted to protect confidentiality, as most MAs in the department are female. Participants could opt to enter in a drawing for three $25 gift cards. The survey was reviewed by the University of Michigan Institutional Review Board and deemed exempt.
 

Seventy-five percent of MAs reported preclinic huddles to plan for patient care were helpful, but only half said huddles took place “always” or “most of the time.”

 


We asked MAs to nominate peers in their clinic who were “especially efficient and do their jobs well—people that others can learn from.” The staff members who were nominated most frequently by their peers were invited to share additional perspectives via a 10- to 30-minute semi-structured interview with the first author. Interviews covered highly efficient practices, barriers and facilitators to efficient care, and physician behaviors that impaired efficiency. We interviewed a minimum of 2 MAs per clinic and increased the number of interviews through snowball sampling, as needed, to reach data saturation (eg, the point at which we were no longer hearing new content). MAs were assured that all comments would be anonymized. There was no monetary incentive for the interviews. The interviewer had previously met only 3 of the 18 MAs interviewed.

 


Analysis. Summary statistics were calculated for quantitative data. To compare subgroups (such as individual clinics), a chi-square test was used. In cases when there were small cell sizes (< 5 subjects), we used the Fisher’s Exact test. Qualitative data was collected with real-time typewritten notes during the interviews to capture ideas and verbatim quotes when possible. We also included open-ended comments shared on the Qualtrics survey. Data were organized by theme using a deductive coding approach. Both authors reviewed and discussed observations, and coding was conducted by the first author. Reporting followed the STROBE Statement checklist for cross-sectional studies.10 Results were shared with MAs, supervisory staff, and physicians, which allowed for feedback and comments and served as “member-checking.” MAs reported that the data reflected their lived experiences.

 

 

Continue to: RESULTS...

 

 

RESULTS

Surveys were distributed to all 86 MAs working in family medicine clinics. A total of 75 (87%) responded to at least some questions (typically just demographics). We used those who completed the full survey (n = 61; 71%) for data analysis. Eighteen MAs participated in face-to-face interviews. Among respondents, 35 (47%) had worked at least 10 years as an MA and 21 (28%) had worked at least a decade in the family medicine department.

Perception of role

All respondents (n = 61; 100%) somewhat or strongly agreed that the MA role was “very important to keep the clinic functioning” and 58 (95%) reported that working in health care was “a calling” for them. Only 7 (11%) agreed that family medicine was an easier environment for MAs compared to a specialty clinic; 30 (49%) disagreed with this. Among respondents, 32 (53%) strongly or somewhat agreed that their work was very stressful and just half (n = 28; 46%) agreed there were adequate MA staff at their clinic.

Efficiency and competing priorities

MAs described important work values that increased their efficiency. These included clinic culture (good communication and strong teamwork), as well as individual strategies such as multitasking, limiting patient conversations, and doing tasks in a consistent way to improve accuracy. (See TABLE 1.) They identified ways physicians bolster or hurt efficiency and ways in which the relationship between the physician and the MA shapes the MA’s perception of their value in clinic.

 

When asked about “pet peeves,” a few MAs advised that physicians should not “talk down” to staff and should try to teach rather than criticize.

Communication was emphasized as critical for efficient care, and MAs encouraged the use of preclinic huddles and communication as priorities. Seventy-five percent of MAs reported preclinic huddles to plan for patient care were helpful, but only half said huddles took place “always” or “most of the time.” Many described reviewing the schedule and completing tasks ahead of patient arrival as critical to efficiency.

 


Participants described the tension between their identified role of orchestrating clinic flow and responding to directives by others that disrupted the flow. Several MAs found it challenging when physicians agreed to see very late patients and felt frustrated when decisions that changed the flow were made by the physician or front desk staff without including the MA. MAs were also able to articulate how they managed competing priorities within the clinic, such as when a patient- or physician-driven need to extend appointments was at odds with maintaining a timely schedule. They were eager to share personal tips for time management and prided themselves on careful and accurate performance and skills they had learned on the job. MAs also described how efficiency could be adversely affected by the behaviors or attitudes of physicians. (See TABLE 2.)

Continue to: Clinic environment...

 

 

Clinic environment

Thirty-six MAs (59%) reported that other MAs on their team were willing to help them out in clinic “a great deal” or “a lot” of the time, by helping to room a patient, acting as a chaperone for an exam, or doing a point-of-care lab. This sense of support varied across clinics (38% to 91% reported good support), suggesting that cultures vary by site. Some MAs expressed frustration at peers they saw as resistant to helping, exemplified by this verbatim quote from an interview:

“Some don’t want to help out. They may sigh. It’s how they react—you just know.” (Clinic #1, MA #2 interview)

Efficient MAs stressed the need for situational awareness to recognize when co-workers need help:

“[Peers often] are not aware that another MA is drowning. There’s 5 people who could have done that, and here I am running around and nobody budged.” (Clinic #5, MA #2 interview)

A minority of staff used the open-ended survey sections to describe clinic hierarchy. When asked about “pet peeves,” a few advised that physicians should not “talk down” to staff and should try to teach rather than criticize. Another asked that physicians not “bark orders” or have “low gratitude” for staff work. MAs found micromanaging stressful—particularly when the physician prompted the MA about patient arrivals:

“[I don’t like] when providers will make a comment about a patient arriving when you already know this information. You then rush to put [the] patient in [a] room, then [the] provider ends up making [the] patient wait an extensive amount of time. I’m perfectly capable of knowing when a patient arrives.” (Clinic #6, survey)
 

MAs did not like physicians “talking bad about us” or blaming the MA if the clinic is running behind.
 

Despite these concerns, most MAs reported feeling appreciated for the job they do. Only 10 (16%) reported that the people they work with rarely say “thank you,” and 2 (3%) stated they were not well supported by the physicians in clinic. Most (n = 38; 62%) strongly agreed or agreed that they felt part of the team and that their opinions matter. In the interviews, many expanded on this idea:

“I really feel like I’m valued, so I want to do everything I can to make [my doctor’s] day go better. If you want a good clinic, the best thing a doc can do is make the MA feel valued.” (Clinic #1, MA #1 interview)

Continue to: DISCUSSION...

 

 

DISCUSSION

Participants described their role much as an orchestra director, with MAs as the key to clinic flow and timeliness.9 Respondents articulated multiple common strategies used to increase their own efficiency and clinic flow; these may be considered best practices and incorporated as part of the basic training. Most MAs reported their day-to-day jobs were stressful and believed this was underrecognized, so efficiency strategies are critical. With staff completing multiple time-sensitive tasks during clinic, consistent co-worker support is crucial and may impact efficiency.8 Proper training of managers to provide that support and ensure equitable workloads may be one strategy to ensure that staff members feel the workplace is fair and collegial.

Several comments reflected the power differential within medical offices. One study reported that MAs and physicians “occupy roles at opposite ends of social and occupational hierarchies.”11 It’s important for physicians to be cognizant of these patterns and clinic culture, as reducing a hierarchy-based environment will be appreciated by MAs.9 Prior research has found that MAs have higher perceptions of their own competence than do the physicians working with them.12 If there is a fundamental lack of trust between the 2 groups, this will undoubtedly hinder team-building. Attention to this issue is key to a more favorable work environment.

Almost all respondents reported health care was a “calling,” which mirrors physician research that suggests seeing work as a “calling” is protective against burnout.13,14 Open-ended comments indicated great pride in contributions, and most staff members felt appreciated by their teams. Many described the working relationships with physicians as critical to their satisfaction at work and indicated that strong partnerships motivated them to do their best to make the physician’s day easier. Staff job satisfaction is linked to improved quality of care, so treating staff well contributes to high-value care for patients.15 We also uncovered some MA “pet peeves” that hinder efficiency and could be shared with physicians to emphasize the importance of patience and civility.

One barrier to expansion of MA roles within PCMH practices is the limited pay and career ladder for MAs who adopt new job responsibilities that require advanced skills or training.1,2 The mean MA salary at our institution ($37,372) is higher than in our state overall ($33,760), which may impact satisfaction.16 In addition, 93% of MAs are women; thus, they may continue to struggle more with lower pay than do workers in male- dominated professions.17,18 Expected job growth from 2018-2028 is predicted at 23%, which may help to boost salaries. 19  Prior studies describe the lack of a job ladder or promotion opportunities as a challenge1,20; this was not formally assessed in our study.


Prior research has found that MAs have higher perceptions of their own competence than do the physicians working with them.


MAs see work in family medicine as much harder than it is in other   specialty clinics. Being trusted with more responsibility, greater autonomy,21-23 and expanded patient care roles can boost MA self-efficacy, which can reduce burnout for both physicians and MAs. 8,24  However, new responsibilities should include appropriate training, support, and compensation, and match staff interests.7

 

 


Study limitations. The study was limited to 6 clinics in 1 department at a large academic medical center. Interviewed participants were selected by convenience and snowball sampling and thus, the results cannot be generalized to the population of MAs as a whole. As the initial interview goal was simply to gather efficiency tips, the project was not designed to be formal qualitative research. However, the discussions built on open-ended comments from the written survey helped contextualize our quantitative findings about efficiency. Notes were documented in real time by a single interviewer with rapid typing skills, which allowed capture of quotes verbatim. Subsequent studies would benefit from more formal qualitative research methods (recording and transcribing interviews, multiple coders to reduce risk of bias, and more complex thematic analysis).

Our research demonstrated how MAs perceive their roles in primary care and the facilitators and barriers to high efficiency in the workplace, which begins to fill an important knowledge gap in primary care. Disseminating practices that staff members themselves have identified as effective, and being attentive to how staff members are treated, may increase individual efficiency while improving staff retention and satisfaction.

CORRESPONDENCE Katherine J. Gold, MD, MSW, MS, Department of Family Medicine and Department of Obstetrics and Gynecology, University of Michigan, 1018 Fuller Street, Ann Arbor, MI 48104-1213; ktgold@umich.edu

 

References
  1. Chapman SA, Blash LK. New roles for medical assistants in innovative primary care practices. Health Serv Res. 2017;52(suppl 1):383-406.
  2. Ferrante JM, Shaw EK, Bayly JE, et al. Barriers and facilitators to expanding roles of medical assistants in patient-centered medical homes (PCMHs). J Am Board Fam Med. 2018;31:226-235.
  3. Atkins B. The outlook for medical assisting in 2016 and beyond. Accessed January 27, 2022. www.medicalassistantdegrees.net/ articles/medical-assisting-trends/
  4. Unqualified medical “assistants.” Hospital (Lond 1886). 1897;23:163-164.
  5. Ameritech College of Healthcare. The origins of the AAMA. Accessed January 27, 2022. www.ameritech.edu/blog/medicalassisting-history/
  6. Dai M, Willard-Grace R, Knox M, et al. Team configurations, efficiency, and family physician burnout. J Am Board Fam Med. 2020;33:368-377.
  7. Harper PG, Van Riper K, Ramer T, et al. Team-based care: an expanded medical assistant role—enhanced rooming and visit assistance. J Interprof Care. 2018:1-7.
  8. Sheridan B, Chien AT, Peters AS, et al. Team-based primary care: the medical assistant perspective. Health Care Manage Rev. 2018;43:115-125.
  9. Tache S, Hill-Sakurai L. Medical assistants: the invisible “glue” of primary health care practices in the United States? J Health Organ Manag. 2010;24:288-305.
  10. STROBE checklist for cohort, case-control, and cross-sectional studies. Accessed January 27, 2022. www.strobe-statement.org/ fileadmin/Strobe/uploads/checklists/STROBE_checklist_v4_ combined.pdf
  11. Gray CP, Harrison MI, Hung D. Medical assistants as flow managers in primary care: challenges and recommendations. J Healthc Manag. 2016;61:181-191.
  12. Elder NC, Jacobson CJ, Bolon SK, et al. Patterns of relating between physicians and medical assistants in small family medicine offices. Ann Fam Med. 2014;12:150-157.
  13. Jager AJ, Tutty MA, Kao AC. Association between physician burnout and identification with medicine as a calling. Mayo Clinic Proc. 2017;92:415-422.
  14. Yoon JD, Daley BM, Curlin FA. The association between a sense of calling and physician well-being: a national study of primary care physicians and psychiatrists. Acad Psychiatry. 2017;41:167-173.
  15. Mohr DC, Young GJ, Meterko M, et al. Job satisfaction of primary care team members and quality of care. Am J Med Qual. 2011;26:18-25.
  16. US Bureau of Labor Statistics. Occupational employment and wage statistics. Accessed January 27, 2022. https://www.bls.gov/ oes/current/oes319092.htm
  17.  Chapman SA, Marks A, Dower C. Positioning medical assistants for a greater role in the era of health reform. Acad Med. 2015;90:1347-1352.
  18. Mandel H. The role of occupational attributes in gender earnings inequality, 1970-2010. Soc Sci Res. 2016;55:122-138.
  19. US Bureau of Labor Statistics. Occupational outlook handbook: medical assistants. Accessed January 27, 2022. www.bls.gov/ooh/ healthcare/medical-assistants.htm
  20. Skillman SM, Dahal A, Frogner BK, et al. Frontline workers’ career pathways: a detailed look at Washington state’s medical assistant workforce. Med Care Res Rev. 2018:1077558718812950.
  21. Morse G, Salyers MP, Rollins AL, et al. Burnout in mental health services: a review of the problem and its remediation. Adm Policy Ment Health. 2012;39:341-352.
  22. Dubois CA, Bentein K, Ben Mansour JB, et al. Why some employees adopt or resist reorganization of work practices in health care: associations between perceived loss of resources, burnout, and attitudes to change. Int J Environ Res Pub Health. 2014;11: 187-201.
  23. Aronsson G, Theorell T, Grape T, et al. A systematic review including meta-analysis of work environment and burnout symptoms. BMC Public Health. 2017;17:264.
  24. O’Malley AS, Gourevitch R, Draper K, et al. Overcoming challenges to teamwork in patient-centered medical homes: a qualitative study. J Gen Intern Med. 2015;30:183-192.
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Katherine J. Gold, MD, MSW, MS; Kathryn M. Harmes, MD, MHSA

Department of Family Medicine (Drs. Gold and Harmes) and Department of Obstetrics and Gynecology (Dr. Gold), University of Michigan, Ann Arbor ktgold@umich.edu

The authors reported no potential conflict of interest relevant to this article.

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Department of Family Medicine (Drs. Gold and Harmes) and Department of Obstetrics and Gynecology (Dr. Gold), University of Michigan, Ann Arbor ktgold@umich.edu

The authors reported no potential conflict of interest relevant to this article.

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Katherine J. Gold, MD, MSW, MS; Kathryn M. Harmes, MD, MHSA

Department of Family Medicine (Drs. Gold and Harmes) and Department of Obstetrics and Gynecology (Dr. Gold), University of Michigan, Ann Arbor ktgold@umich.edu

The authors reported no potential conflict of interest relevant to this article.

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ABSTRACT

Background: Medical assistant (MA) roles have expanded rapidly as primary care has evolved and MAs take on new patient care duties. Research that looks at the MA experience and factors that enhance or reduce efficiency among MAs is limited.

Methods: We surveyed all MAs working in 6 clinics run by a large academic family medicine department in Ann Arbor, Michigan. MAs deemed by peers as “most efficient” were selected for follow-up interviews. We evaluated personal strategies for efficiency, barriers to efficient care, impact of physician actions on efficiency, and satisfaction.

Results: A total of 75/86 MAs (87%) responded to at least some survey questions and 61/86 (71%) completed the full survey. We interviewed 18 MAs face to face. Most saw their role as essential to clinic functioning and viewed health care as a personal calling. MAs identified common strategies to improve efficiency and described the MA role to orchestrate the flow of the clinic day. Staff recognized differing priorities of patients, staff, and physicians and articulated frustrations with hierarchy and competing priorities as well as behaviors that impeded clinic efficiency. Respondents emphasized the importance of feeling valued by others on their team.

Conclusions: With the evolving demands made on MAs’ time, it is critical to understand how the most effective staff members manage their role and highlight the strategies they employ to provide efficient clinical care. Understanding factors that increase or decrease MA job satisfaction can help identify high-efficiency practices and promote a clinic culture that values and supports all staff.

As primary care continues to evolve into more team-based practice, the role of the medical assistant (MA) has rapidly transformed.1 Staff may assist with patient management, documentation in the electronic medical record, order entry, pre-visit planning, and fulfillment of quality metrics, particularly in a Primary Care Medical Home (PCMH).2 From 2012 through 2014, MA job postings per graduate increased from 1.3 to 2.3, suggesting twice as many job postings as graduates.3 As the demand for experienced MAs increases, the ability to recruit and retain high-performing staff members will be critical.

MAs are referenced in medical literature as early as the 1800s.4 The American Association of Medical Assistants was founded in 1956, which led to educational standardization and certifications.5 Despite the important role that MAs have long played in the proper functioning of a medical clinic—and the knowledge that team configurations impact a clinic’s efficiency and quality6,7—few investigations have sought out the MA’s perspective.8,9 Given the increasing clinical demands placed on all members of the primary care team (and the burnout that often results), it seems that MA insights into clinic efficiency could be valuable.

Continue to: Methods...

 

 

METHODS

This cross-sectional study was conducted from February to April 2019 at a large academic institution with 6 regional ambulatory care family medicine clinics, each one with 11,000 to 18,000 patient visits annually. Faculty work at all 6 clinics and residents at 2 of them. All MAs are hired, paid, and managed by a central administrative department rather than by the family medicine department. The family medicine clinics are currently PCMH certified, with a mix of fee-for-service and capitated reimbursement.

We developed and piloted a voluntary, anonymous 39-question (29 closed-ended and 10 brief open-ended) online Qualtrics survey, which we distributed via an email link to all the MAs in the department. The survey included clinic site, years as an MA, perceptions of the clinic environment, perception of teamwork at their site, identification of efficient practices, and feedback for physicians to improve efficiency and flow. Most questions were Likert-style with 5 choices ranging from “strongly agree” to “strongly disagree” or short answer. Age and gender were omitted to protect confidentiality, as most MAs in the department are female. Participants could opt to enter in a drawing for three $25 gift cards. The survey was reviewed by the University of Michigan Institutional Review Board and deemed exempt.
 

Seventy-five percent of MAs reported preclinic huddles to plan for patient care were helpful, but only half said huddles took place “always” or “most of the time.”

 


We asked MAs to nominate peers in their clinic who were “especially efficient and do their jobs well—people that others can learn from.” The staff members who were nominated most frequently by their peers were invited to share additional perspectives via a 10- to 30-minute semi-structured interview with the first author. Interviews covered highly efficient practices, barriers and facilitators to efficient care, and physician behaviors that impaired efficiency. We interviewed a minimum of 2 MAs per clinic and increased the number of interviews through snowball sampling, as needed, to reach data saturation (eg, the point at which we were no longer hearing new content). MAs were assured that all comments would be anonymized. There was no monetary incentive for the interviews. The interviewer had previously met only 3 of the 18 MAs interviewed.

 


Analysis. Summary statistics were calculated for quantitative data. To compare subgroups (such as individual clinics), a chi-square test was used. In cases when there were small cell sizes (< 5 subjects), we used the Fisher’s Exact test. Qualitative data was collected with real-time typewritten notes during the interviews to capture ideas and verbatim quotes when possible. We also included open-ended comments shared on the Qualtrics survey. Data were organized by theme using a deductive coding approach. Both authors reviewed and discussed observations, and coding was conducted by the first author. Reporting followed the STROBE Statement checklist for cross-sectional studies.10 Results were shared with MAs, supervisory staff, and physicians, which allowed for feedback and comments and served as “member-checking.” MAs reported that the data reflected their lived experiences.

 

 

Continue to: RESULTS...

 

 

RESULTS

Surveys were distributed to all 86 MAs working in family medicine clinics. A total of 75 (87%) responded to at least some questions (typically just demographics). We used those who completed the full survey (n = 61; 71%) for data analysis. Eighteen MAs participated in face-to-face interviews. Among respondents, 35 (47%) had worked at least 10 years as an MA and 21 (28%) had worked at least a decade in the family medicine department.

Perception of role

All respondents (n = 61; 100%) somewhat or strongly agreed that the MA role was “very important to keep the clinic functioning” and 58 (95%) reported that working in health care was “a calling” for them. Only 7 (11%) agreed that family medicine was an easier environment for MAs compared to a specialty clinic; 30 (49%) disagreed with this. Among respondents, 32 (53%) strongly or somewhat agreed that their work was very stressful and just half (n = 28; 46%) agreed there were adequate MA staff at their clinic.

Efficiency and competing priorities

MAs described important work values that increased their efficiency. These included clinic culture (good communication and strong teamwork), as well as individual strategies such as multitasking, limiting patient conversations, and doing tasks in a consistent way to improve accuracy. (See TABLE 1.) They identified ways physicians bolster or hurt efficiency and ways in which the relationship between the physician and the MA shapes the MA’s perception of their value in clinic.

 

When asked about “pet peeves,” a few MAs advised that physicians should not “talk down” to staff and should try to teach rather than criticize.

Communication was emphasized as critical for efficient care, and MAs encouraged the use of preclinic huddles and communication as priorities. Seventy-five percent of MAs reported preclinic huddles to plan for patient care were helpful, but only half said huddles took place “always” or “most of the time.” Many described reviewing the schedule and completing tasks ahead of patient arrival as critical to efficiency.

 


Participants described the tension between their identified role of orchestrating clinic flow and responding to directives by others that disrupted the flow. Several MAs found it challenging when physicians agreed to see very late patients and felt frustrated when decisions that changed the flow were made by the physician or front desk staff without including the MA. MAs were also able to articulate how they managed competing priorities within the clinic, such as when a patient- or physician-driven need to extend appointments was at odds with maintaining a timely schedule. They were eager to share personal tips for time management and prided themselves on careful and accurate performance and skills they had learned on the job. MAs also described how efficiency could be adversely affected by the behaviors or attitudes of physicians. (See TABLE 2.)

Continue to: Clinic environment...

 

 

Clinic environment

Thirty-six MAs (59%) reported that other MAs on their team were willing to help them out in clinic “a great deal” or “a lot” of the time, by helping to room a patient, acting as a chaperone for an exam, or doing a point-of-care lab. This sense of support varied across clinics (38% to 91% reported good support), suggesting that cultures vary by site. Some MAs expressed frustration at peers they saw as resistant to helping, exemplified by this verbatim quote from an interview:

“Some don’t want to help out. They may sigh. It’s how they react—you just know.” (Clinic #1, MA #2 interview)

Efficient MAs stressed the need for situational awareness to recognize when co-workers need help:

“[Peers often] are not aware that another MA is drowning. There’s 5 people who could have done that, and here I am running around and nobody budged.” (Clinic #5, MA #2 interview)

A minority of staff used the open-ended survey sections to describe clinic hierarchy. When asked about “pet peeves,” a few advised that physicians should not “talk down” to staff and should try to teach rather than criticize. Another asked that physicians not “bark orders” or have “low gratitude” for staff work. MAs found micromanaging stressful—particularly when the physician prompted the MA about patient arrivals:

“[I don’t like] when providers will make a comment about a patient arriving when you already know this information. You then rush to put [the] patient in [a] room, then [the] provider ends up making [the] patient wait an extensive amount of time. I’m perfectly capable of knowing when a patient arrives.” (Clinic #6, survey)
 

MAs did not like physicians “talking bad about us” or blaming the MA if the clinic is running behind.
 

Despite these concerns, most MAs reported feeling appreciated for the job they do. Only 10 (16%) reported that the people they work with rarely say “thank you,” and 2 (3%) stated they were not well supported by the physicians in clinic. Most (n = 38; 62%) strongly agreed or agreed that they felt part of the team and that their opinions matter. In the interviews, many expanded on this idea:

“I really feel like I’m valued, so I want to do everything I can to make [my doctor’s] day go better. If you want a good clinic, the best thing a doc can do is make the MA feel valued.” (Clinic #1, MA #1 interview)

Continue to: DISCUSSION...

 

 

DISCUSSION

Participants described their role much as an orchestra director, with MAs as the key to clinic flow and timeliness.9 Respondents articulated multiple common strategies used to increase their own efficiency and clinic flow; these may be considered best practices and incorporated as part of the basic training. Most MAs reported their day-to-day jobs were stressful and believed this was underrecognized, so efficiency strategies are critical. With staff completing multiple time-sensitive tasks during clinic, consistent co-worker support is crucial and may impact efficiency.8 Proper training of managers to provide that support and ensure equitable workloads may be one strategy to ensure that staff members feel the workplace is fair and collegial.

Several comments reflected the power differential within medical offices. One study reported that MAs and physicians “occupy roles at opposite ends of social and occupational hierarchies.”11 It’s important for physicians to be cognizant of these patterns and clinic culture, as reducing a hierarchy-based environment will be appreciated by MAs.9 Prior research has found that MAs have higher perceptions of their own competence than do the physicians working with them.12 If there is a fundamental lack of trust between the 2 groups, this will undoubtedly hinder team-building. Attention to this issue is key to a more favorable work environment.

Almost all respondents reported health care was a “calling,” which mirrors physician research that suggests seeing work as a “calling” is protective against burnout.13,14 Open-ended comments indicated great pride in contributions, and most staff members felt appreciated by their teams. Many described the working relationships with physicians as critical to their satisfaction at work and indicated that strong partnerships motivated them to do their best to make the physician’s day easier. Staff job satisfaction is linked to improved quality of care, so treating staff well contributes to high-value care for patients.15 We also uncovered some MA “pet peeves” that hinder efficiency and could be shared with physicians to emphasize the importance of patience and civility.

One barrier to expansion of MA roles within PCMH practices is the limited pay and career ladder for MAs who adopt new job responsibilities that require advanced skills or training.1,2 The mean MA salary at our institution ($37,372) is higher than in our state overall ($33,760), which may impact satisfaction.16 In addition, 93% of MAs are women; thus, they may continue to struggle more with lower pay than do workers in male- dominated professions.17,18 Expected job growth from 2018-2028 is predicted at 23%, which may help to boost salaries. 19  Prior studies describe the lack of a job ladder or promotion opportunities as a challenge1,20; this was not formally assessed in our study.


Prior research has found that MAs have higher perceptions of their own competence than do the physicians working with them.


MAs see work in family medicine as much harder than it is in other   specialty clinics. Being trusted with more responsibility, greater autonomy,21-23 and expanded patient care roles can boost MA self-efficacy, which can reduce burnout for both physicians and MAs. 8,24  However, new responsibilities should include appropriate training, support, and compensation, and match staff interests.7

 

 


Study limitations. The study was limited to 6 clinics in 1 department at a large academic medical center. Interviewed participants were selected by convenience and snowball sampling and thus, the results cannot be generalized to the population of MAs as a whole. As the initial interview goal was simply to gather efficiency tips, the project was not designed to be formal qualitative research. However, the discussions built on open-ended comments from the written survey helped contextualize our quantitative findings about efficiency. Notes were documented in real time by a single interviewer with rapid typing skills, which allowed capture of quotes verbatim. Subsequent studies would benefit from more formal qualitative research methods (recording and transcribing interviews, multiple coders to reduce risk of bias, and more complex thematic analysis).

Our research demonstrated how MAs perceive their roles in primary care and the facilitators and barriers to high efficiency in the workplace, which begins to fill an important knowledge gap in primary care. Disseminating practices that staff members themselves have identified as effective, and being attentive to how staff members are treated, may increase individual efficiency while improving staff retention and satisfaction.

CORRESPONDENCE Katherine J. Gold, MD, MSW, MS, Department of Family Medicine and Department of Obstetrics and Gynecology, University of Michigan, 1018 Fuller Street, Ann Arbor, MI 48104-1213; ktgold@umich.edu

 

 

ABSTRACT

Background: Medical assistant (MA) roles have expanded rapidly as primary care has evolved and MAs take on new patient care duties. Research that looks at the MA experience and factors that enhance or reduce efficiency among MAs is limited.

Methods: We surveyed all MAs working in 6 clinics run by a large academic family medicine department in Ann Arbor, Michigan. MAs deemed by peers as “most efficient” were selected for follow-up interviews. We evaluated personal strategies for efficiency, barriers to efficient care, impact of physician actions on efficiency, and satisfaction.

Results: A total of 75/86 MAs (87%) responded to at least some survey questions and 61/86 (71%) completed the full survey. We interviewed 18 MAs face to face. Most saw their role as essential to clinic functioning and viewed health care as a personal calling. MAs identified common strategies to improve efficiency and described the MA role to orchestrate the flow of the clinic day. Staff recognized differing priorities of patients, staff, and physicians and articulated frustrations with hierarchy and competing priorities as well as behaviors that impeded clinic efficiency. Respondents emphasized the importance of feeling valued by others on their team.

Conclusions: With the evolving demands made on MAs’ time, it is critical to understand how the most effective staff members manage their role and highlight the strategies they employ to provide efficient clinical care. Understanding factors that increase or decrease MA job satisfaction can help identify high-efficiency practices and promote a clinic culture that values and supports all staff.

As primary care continues to evolve into more team-based practice, the role of the medical assistant (MA) has rapidly transformed.1 Staff may assist with patient management, documentation in the electronic medical record, order entry, pre-visit planning, and fulfillment of quality metrics, particularly in a Primary Care Medical Home (PCMH).2 From 2012 through 2014, MA job postings per graduate increased from 1.3 to 2.3, suggesting twice as many job postings as graduates.3 As the demand for experienced MAs increases, the ability to recruit and retain high-performing staff members will be critical.

MAs are referenced in medical literature as early as the 1800s.4 The American Association of Medical Assistants was founded in 1956, which led to educational standardization and certifications.5 Despite the important role that MAs have long played in the proper functioning of a medical clinic—and the knowledge that team configurations impact a clinic’s efficiency and quality6,7—few investigations have sought out the MA’s perspective.8,9 Given the increasing clinical demands placed on all members of the primary care team (and the burnout that often results), it seems that MA insights into clinic efficiency could be valuable.

Continue to: Methods...

 

 

METHODS

This cross-sectional study was conducted from February to April 2019 at a large academic institution with 6 regional ambulatory care family medicine clinics, each one with 11,000 to 18,000 patient visits annually. Faculty work at all 6 clinics and residents at 2 of them. All MAs are hired, paid, and managed by a central administrative department rather than by the family medicine department. The family medicine clinics are currently PCMH certified, with a mix of fee-for-service and capitated reimbursement.

We developed and piloted a voluntary, anonymous 39-question (29 closed-ended and 10 brief open-ended) online Qualtrics survey, which we distributed via an email link to all the MAs in the department. The survey included clinic site, years as an MA, perceptions of the clinic environment, perception of teamwork at their site, identification of efficient practices, and feedback for physicians to improve efficiency and flow. Most questions were Likert-style with 5 choices ranging from “strongly agree” to “strongly disagree” or short answer. Age and gender were omitted to protect confidentiality, as most MAs in the department are female. Participants could opt to enter in a drawing for three $25 gift cards. The survey was reviewed by the University of Michigan Institutional Review Board and deemed exempt.
 

Seventy-five percent of MAs reported preclinic huddles to plan for patient care were helpful, but only half said huddles took place “always” or “most of the time.”

 


We asked MAs to nominate peers in their clinic who were “especially efficient and do their jobs well—people that others can learn from.” The staff members who were nominated most frequently by their peers were invited to share additional perspectives via a 10- to 30-minute semi-structured interview with the first author. Interviews covered highly efficient practices, barriers and facilitators to efficient care, and physician behaviors that impaired efficiency. We interviewed a minimum of 2 MAs per clinic and increased the number of interviews through snowball sampling, as needed, to reach data saturation (eg, the point at which we were no longer hearing new content). MAs were assured that all comments would be anonymized. There was no monetary incentive for the interviews. The interviewer had previously met only 3 of the 18 MAs interviewed.

 


Analysis. Summary statistics were calculated for quantitative data. To compare subgroups (such as individual clinics), a chi-square test was used. In cases when there were small cell sizes (< 5 subjects), we used the Fisher’s Exact test. Qualitative data was collected with real-time typewritten notes during the interviews to capture ideas and verbatim quotes when possible. We also included open-ended comments shared on the Qualtrics survey. Data were organized by theme using a deductive coding approach. Both authors reviewed and discussed observations, and coding was conducted by the first author. Reporting followed the STROBE Statement checklist for cross-sectional studies.10 Results were shared with MAs, supervisory staff, and physicians, which allowed for feedback and comments and served as “member-checking.” MAs reported that the data reflected their lived experiences.

 

 

Continue to: RESULTS...

 

 

RESULTS

Surveys were distributed to all 86 MAs working in family medicine clinics. A total of 75 (87%) responded to at least some questions (typically just demographics). We used those who completed the full survey (n = 61; 71%) for data analysis. Eighteen MAs participated in face-to-face interviews. Among respondents, 35 (47%) had worked at least 10 years as an MA and 21 (28%) had worked at least a decade in the family medicine department.

Perception of role

All respondents (n = 61; 100%) somewhat or strongly agreed that the MA role was “very important to keep the clinic functioning” and 58 (95%) reported that working in health care was “a calling” for them. Only 7 (11%) agreed that family medicine was an easier environment for MAs compared to a specialty clinic; 30 (49%) disagreed with this. Among respondents, 32 (53%) strongly or somewhat agreed that their work was very stressful and just half (n = 28; 46%) agreed there were adequate MA staff at their clinic.

Efficiency and competing priorities

MAs described important work values that increased their efficiency. These included clinic culture (good communication and strong teamwork), as well as individual strategies such as multitasking, limiting patient conversations, and doing tasks in a consistent way to improve accuracy. (See TABLE 1.) They identified ways physicians bolster or hurt efficiency and ways in which the relationship between the physician and the MA shapes the MA’s perception of their value in clinic.

 

When asked about “pet peeves,” a few MAs advised that physicians should not “talk down” to staff and should try to teach rather than criticize.

Communication was emphasized as critical for efficient care, and MAs encouraged the use of preclinic huddles and communication as priorities. Seventy-five percent of MAs reported preclinic huddles to plan for patient care were helpful, but only half said huddles took place “always” or “most of the time.” Many described reviewing the schedule and completing tasks ahead of patient arrival as critical to efficiency.

 


Participants described the tension between their identified role of orchestrating clinic flow and responding to directives by others that disrupted the flow. Several MAs found it challenging when physicians agreed to see very late patients and felt frustrated when decisions that changed the flow were made by the physician or front desk staff without including the MA. MAs were also able to articulate how they managed competing priorities within the clinic, such as when a patient- or physician-driven need to extend appointments was at odds with maintaining a timely schedule. They were eager to share personal tips for time management and prided themselves on careful and accurate performance and skills they had learned on the job. MAs also described how efficiency could be adversely affected by the behaviors or attitudes of physicians. (See TABLE 2.)

Continue to: Clinic environment...

 

 

Clinic environment

Thirty-six MAs (59%) reported that other MAs on their team were willing to help them out in clinic “a great deal” or “a lot” of the time, by helping to room a patient, acting as a chaperone for an exam, or doing a point-of-care lab. This sense of support varied across clinics (38% to 91% reported good support), suggesting that cultures vary by site. Some MAs expressed frustration at peers they saw as resistant to helping, exemplified by this verbatim quote from an interview:

“Some don’t want to help out. They may sigh. It’s how they react—you just know.” (Clinic #1, MA #2 interview)

Efficient MAs stressed the need for situational awareness to recognize when co-workers need help:

“[Peers often] are not aware that another MA is drowning. There’s 5 people who could have done that, and here I am running around and nobody budged.” (Clinic #5, MA #2 interview)

A minority of staff used the open-ended survey sections to describe clinic hierarchy. When asked about “pet peeves,” a few advised that physicians should not “talk down” to staff and should try to teach rather than criticize. Another asked that physicians not “bark orders” or have “low gratitude” for staff work. MAs found micromanaging stressful—particularly when the physician prompted the MA about patient arrivals:

“[I don’t like] when providers will make a comment about a patient arriving when you already know this information. You then rush to put [the] patient in [a] room, then [the] provider ends up making [the] patient wait an extensive amount of time. I’m perfectly capable of knowing when a patient arrives.” (Clinic #6, survey)
 

MAs did not like physicians “talking bad about us” or blaming the MA if the clinic is running behind.
 

Despite these concerns, most MAs reported feeling appreciated for the job they do. Only 10 (16%) reported that the people they work with rarely say “thank you,” and 2 (3%) stated they were not well supported by the physicians in clinic. Most (n = 38; 62%) strongly agreed or agreed that they felt part of the team and that their opinions matter. In the interviews, many expanded on this idea:

“I really feel like I’m valued, so I want to do everything I can to make [my doctor’s] day go better. If you want a good clinic, the best thing a doc can do is make the MA feel valued.” (Clinic #1, MA #1 interview)

Continue to: DISCUSSION...

 

 

DISCUSSION

Participants described their role much as an orchestra director, with MAs as the key to clinic flow and timeliness.9 Respondents articulated multiple common strategies used to increase their own efficiency and clinic flow; these may be considered best practices and incorporated as part of the basic training. Most MAs reported their day-to-day jobs were stressful and believed this was underrecognized, so efficiency strategies are critical. With staff completing multiple time-sensitive tasks during clinic, consistent co-worker support is crucial and may impact efficiency.8 Proper training of managers to provide that support and ensure equitable workloads may be one strategy to ensure that staff members feel the workplace is fair and collegial.

Several comments reflected the power differential within medical offices. One study reported that MAs and physicians “occupy roles at opposite ends of social and occupational hierarchies.”11 It’s important for physicians to be cognizant of these patterns and clinic culture, as reducing a hierarchy-based environment will be appreciated by MAs.9 Prior research has found that MAs have higher perceptions of their own competence than do the physicians working with them.12 If there is a fundamental lack of trust between the 2 groups, this will undoubtedly hinder team-building. Attention to this issue is key to a more favorable work environment.

Almost all respondents reported health care was a “calling,” which mirrors physician research that suggests seeing work as a “calling” is protective against burnout.13,14 Open-ended comments indicated great pride in contributions, and most staff members felt appreciated by their teams. Many described the working relationships with physicians as critical to their satisfaction at work and indicated that strong partnerships motivated them to do their best to make the physician’s day easier. Staff job satisfaction is linked to improved quality of care, so treating staff well contributes to high-value care for patients.15 We also uncovered some MA “pet peeves” that hinder efficiency and could be shared with physicians to emphasize the importance of patience and civility.

One barrier to expansion of MA roles within PCMH practices is the limited pay and career ladder for MAs who adopt new job responsibilities that require advanced skills or training.1,2 The mean MA salary at our institution ($37,372) is higher than in our state overall ($33,760), which may impact satisfaction.16 In addition, 93% of MAs are women; thus, they may continue to struggle more with lower pay than do workers in male- dominated professions.17,18 Expected job growth from 2018-2028 is predicted at 23%, which may help to boost salaries. 19  Prior studies describe the lack of a job ladder or promotion opportunities as a challenge1,20; this was not formally assessed in our study.


Prior research has found that MAs have higher perceptions of their own competence than do the physicians working with them.


MAs see work in family medicine as much harder than it is in other   specialty clinics. Being trusted with more responsibility, greater autonomy,21-23 and expanded patient care roles can boost MA self-efficacy, which can reduce burnout for both physicians and MAs. 8,24  However, new responsibilities should include appropriate training, support, and compensation, and match staff interests.7

 

 


Study limitations. The study was limited to 6 clinics in 1 department at a large academic medical center. Interviewed participants were selected by convenience and snowball sampling and thus, the results cannot be generalized to the population of MAs as a whole. As the initial interview goal was simply to gather efficiency tips, the project was not designed to be formal qualitative research. However, the discussions built on open-ended comments from the written survey helped contextualize our quantitative findings about efficiency. Notes were documented in real time by a single interviewer with rapid typing skills, which allowed capture of quotes verbatim. Subsequent studies would benefit from more formal qualitative research methods (recording and transcribing interviews, multiple coders to reduce risk of bias, and more complex thematic analysis).

Our research demonstrated how MAs perceive their roles in primary care and the facilitators and barriers to high efficiency in the workplace, which begins to fill an important knowledge gap in primary care. Disseminating practices that staff members themselves have identified as effective, and being attentive to how staff members are treated, may increase individual efficiency while improving staff retention and satisfaction.

CORRESPONDENCE Katherine J. Gold, MD, MSW, MS, Department of Family Medicine and Department of Obstetrics and Gynecology, University of Michigan, 1018 Fuller Street, Ann Arbor, MI 48104-1213; ktgold@umich.edu

 

References
  1. Chapman SA, Blash LK. New roles for medical assistants in innovative primary care practices. Health Serv Res. 2017;52(suppl 1):383-406.
  2. Ferrante JM, Shaw EK, Bayly JE, et al. Barriers and facilitators to expanding roles of medical assistants in patient-centered medical homes (PCMHs). J Am Board Fam Med. 2018;31:226-235.
  3. Atkins B. The outlook for medical assisting in 2016 and beyond. Accessed January 27, 2022. www.medicalassistantdegrees.net/ articles/medical-assisting-trends/
  4. Unqualified medical “assistants.” Hospital (Lond 1886). 1897;23:163-164.
  5. Ameritech College of Healthcare. The origins of the AAMA. Accessed January 27, 2022. www.ameritech.edu/blog/medicalassisting-history/
  6. Dai M, Willard-Grace R, Knox M, et al. Team configurations, efficiency, and family physician burnout. J Am Board Fam Med. 2020;33:368-377.
  7. Harper PG, Van Riper K, Ramer T, et al. Team-based care: an expanded medical assistant role—enhanced rooming and visit assistance. J Interprof Care. 2018:1-7.
  8. Sheridan B, Chien AT, Peters AS, et al. Team-based primary care: the medical assistant perspective. Health Care Manage Rev. 2018;43:115-125.
  9. Tache S, Hill-Sakurai L. Medical assistants: the invisible “glue” of primary health care practices in the United States? J Health Organ Manag. 2010;24:288-305.
  10. STROBE checklist for cohort, case-control, and cross-sectional studies. Accessed January 27, 2022. www.strobe-statement.org/ fileadmin/Strobe/uploads/checklists/STROBE_checklist_v4_ combined.pdf
  11. Gray CP, Harrison MI, Hung D. Medical assistants as flow managers in primary care: challenges and recommendations. J Healthc Manag. 2016;61:181-191.
  12. Elder NC, Jacobson CJ, Bolon SK, et al. Patterns of relating between physicians and medical assistants in small family medicine offices. Ann Fam Med. 2014;12:150-157.
  13. Jager AJ, Tutty MA, Kao AC. Association between physician burnout and identification with medicine as a calling. Mayo Clinic Proc. 2017;92:415-422.
  14. Yoon JD, Daley BM, Curlin FA. The association between a sense of calling and physician well-being: a national study of primary care physicians and psychiatrists. Acad Psychiatry. 2017;41:167-173.
  15. Mohr DC, Young GJ, Meterko M, et al. Job satisfaction of primary care team members and quality of care. Am J Med Qual. 2011;26:18-25.
  16. US Bureau of Labor Statistics. Occupational employment and wage statistics. Accessed January 27, 2022. https://www.bls.gov/ oes/current/oes319092.htm
  17.  Chapman SA, Marks A, Dower C. Positioning medical assistants for a greater role in the era of health reform. Acad Med. 2015;90:1347-1352.
  18. Mandel H. The role of occupational attributes in gender earnings inequality, 1970-2010. Soc Sci Res. 2016;55:122-138.
  19. US Bureau of Labor Statistics. Occupational outlook handbook: medical assistants. Accessed January 27, 2022. www.bls.gov/ooh/ healthcare/medical-assistants.htm
  20. Skillman SM, Dahal A, Frogner BK, et al. Frontline workers’ career pathways: a detailed look at Washington state’s medical assistant workforce. Med Care Res Rev. 2018:1077558718812950.
  21. Morse G, Salyers MP, Rollins AL, et al. Burnout in mental health services: a review of the problem and its remediation. Adm Policy Ment Health. 2012;39:341-352.
  22. Dubois CA, Bentein K, Ben Mansour JB, et al. Why some employees adopt or resist reorganization of work practices in health care: associations between perceived loss of resources, burnout, and attitudes to change. Int J Environ Res Pub Health. 2014;11: 187-201.
  23. Aronsson G, Theorell T, Grape T, et al. A systematic review including meta-analysis of work environment and burnout symptoms. BMC Public Health. 2017;17:264.
  24. O’Malley AS, Gourevitch R, Draper K, et al. Overcoming challenges to teamwork in patient-centered medical homes: a qualitative study. J Gen Intern Med. 2015;30:183-192.
References
  1. Chapman SA, Blash LK. New roles for medical assistants in innovative primary care practices. Health Serv Res. 2017;52(suppl 1):383-406.
  2. Ferrante JM, Shaw EK, Bayly JE, et al. Barriers and facilitators to expanding roles of medical assistants in patient-centered medical homes (PCMHs). J Am Board Fam Med. 2018;31:226-235.
  3. Atkins B. The outlook for medical assisting in 2016 and beyond. Accessed January 27, 2022. www.medicalassistantdegrees.net/ articles/medical-assisting-trends/
  4. Unqualified medical “assistants.” Hospital (Lond 1886). 1897;23:163-164.
  5. Ameritech College of Healthcare. The origins of the AAMA. Accessed January 27, 2022. www.ameritech.edu/blog/medicalassisting-history/
  6. Dai M, Willard-Grace R, Knox M, et al. Team configurations, efficiency, and family physician burnout. J Am Board Fam Med. 2020;33:368-377.
  7. Harper PG, Van Riper K, Ramer T, et al. Team-based care: an expanded medical assistant role—enhanced rooming and visit assistance. J Interprof Care. 2018:1-7.
  8. Sheridan B, Chien AT, Peters AS, et al. Team-based primary care: the medical assistant perspective. Health Care Manage Rev. 2018;43:115-125.
  9. Tache S, Hill-Sakurai L. Medical assistants: the invisible “glue” of primary health care practices in the United States? J Health Organ Manag. 2010;24:288-305.
  10. STROBE checklist for cohort, case-control, and cross-sectional studies. Accessed January 27, 2022. www.strobe-statement.org/ fileadmin/Strobe/uploads/checklists/STROBE_checklist_v4_ combined.pdf
  11. Gray CP, Harrison MI, Hung D. Medical assistants as flow managers in primary care: challenges and recommendations. J Healthc Manag. 2016;61:181-191.
  12. Elder NC, Jacobson CJ, Bolon SK, et al. Patterns of relating between physicians and medical assistants in small family medicine offices. Ann Fam Med. 2014;12:150-157.
  13. Jager AJ, Tutty MA, Kao AC. Association between physician burnout and identification with medicine as a calling. Mayo Clinic Proc. 2017;92:415-422.
  14. Yoon JD, Daley BM, Curlin FA. The association between a sense of calling and physician well-being: a national study of primary care physicians and psychiatrists. Acad Psychiatry. 2017;41:167-173.
  15. Mohr DC, Young GJ, Meterko M, et al. Job satisfaction of primary care team members and quality of care. Am J Med Qual. 2011;26:18-25.
  16. US Bureau of Labor Statistics. Occupational employment and wage statistics. Accessed January 27, 2022. https://www.bls.gov/ oes/current/oes319092.htm
  17.  Chapman SA, Marks A, Dower C. Positioning medical assistants for a greater role in the era of health reform. Acad Med. 2015;90:1347-1352.
  18. Mandel H. The role of occupational attributes in gender earnings inequality, 1970-2010. Soc Sci Res. 2016;55:122-138.
  19. US Bureau of Labor Statistics. Occupational outlook handbook: medical assistants. Accessed January 27, 2022. www.bls.gov/ooh/ healthcare/medical-assistants.htm
  20. Skillman SM, Dahal A, Frogner BK, et al. Frontline workers’ career pathways: a detailed look at Washington state’s medical assistant workforce. Med Care Res Rev. 2018:1077558718812950.
  21. Morse G, Salyers MP, Rollins AL, et al. Burnout in mental health services: a review of the problem and its remediation. Adm Policy Ment Health. 2012;39:341-352.
  22. Dubois CA, Bentein K, Ben Mansour JB, et al. Why some employees adopt or resist reorganization of work practices in health care: associations between perceived loss of resources, burnout, and attitudes to change. Int J Environ Res Pub Health. 2014;11: 187-201.
  23. Aronsson G, Theorell T, Grape T, et al. A systematic review including meta-analysis of work environment and burnout symptoms. BMC Public Health. 2017;17:264.
  24. O’Malley AS, Gourevitch R, Draper K, et al. Overcoming challenges to teamwork in patient-centered medical homes: a qualitative study. J Gen Intern Med. 2015;30:183-192.
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Resection of five-centimeter cesarean scar ectopic pregnancy and isthmocele repair using vascular clamps

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Dr. Hudgens is Vice Chair of Gynecological Services, Eastern Virginia Medical School.

Dr.  Jones is Resident Physician, Eastern Virginia Medical School.

Dr. Woo is Assistant Professor of Minimally Invasive Gynecologic Surgery, Eastern Virginia Medical School.

Dr. Ito is Assistant Professor of Minimally Invasive Gynecologic Surgery, University of California San Francisco. 

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Dr. Ito is Assistant Professor of Minimally Invasive Gynecologic Surgery, University of California San Francisco. 

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Dr. Woo is Assistant Professor of Minimally Invasive Gynecologic Surgery, Eastern Virginia Medical School.

Dr. Ito is Assistant Professor of Minimally Invasive Gynecologic Surgery, University of California San Francisco. 

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2022 Update on menopause

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This year’s Menopause Update focuses on 2 menopause-related issues relevant to ObGyns and our menopausal patients:

  • choosing the safest regimens, particularly with respect to risk of breast cancer, when prescribing hormone therapy (HT) to menopausal women
  • reviewing the risks and benefits of premenopausal bilateral salpingo-oophorectomy and the pros and cons of replacement HT in surgically menopausal patients.

We hope that you find this updated information useful as you care for menopausal women.

Revisiting menopausal HT  and the risk of breast cancer:  What we know now

Abenhaim HA, Suissa S,  Azoulay L, et al. Menopausal hormone therapy formulation and breast cancer risk. Obstet Gynecol. 2022;139:1103-1110. doi: 10.1097/AOG.0000000000004723.

Reevaluation of the Women’s Health Initiative randomized controlled trials (WHI RCTs), long-term (median follow-up more than 20 years) cumulative  follow-up data, and results from additional studies have suggested that estrogen therapy (ET) alone in menopausal women with prior hysterectomy does not increase the risk of breast cancer. By contrast, estrogen with progestin (synthetic progestogens that include medroxyprogesterone acetate [MPA] and norethindrone acetate) slightly increases the risk of breast cancer. In the past 10 years, several publications have shed light on whether the type of progestogen affects the risk of breast cancer and can help provide evidence-based information to guide clinicians.

 

Breast cancer risk with combined HT and synthetic progestin

In the first part of the WHI RCT, women were randomly assigned to receive either conjugated equine estrogen (CEE) plus synthetic progestin (MPA) or a placebo. Combined estrogen-progestin therapy (EPT) was associated with a modestly elevated risk of breast cancer.1 In the second part of the WHI trial, CEE only (estrogen alone, ET) was compared with placebo among women with prior  hysterectomy, with no effect found on breast cancer incidence.2

Most older observational studies published in 2003 to 2005 found that neither CEE nor estradiol appeared to increase the risk of breast cancer when used alone.3-5 However, estrogen use in combination with synthetic progestins (MPA, norethindrone, levonorgestrel, and norgestrel) has been associated with an increased risk of breast cancer,4,6 while the elevated risk of breast cancer with micronized progesterone has been less substantial.7,8

Continue to: Newer data suggest the type of progestogen used affects risk...

 

 

Newer data suggest the type of progestogen used affects risk

In a report published in the June 2022 issue of Obstetrics and Gynecology, Abenhaim and colleagues used a nested population-based case-control study of administrative data available in the UK Clinical Practice Research Datalink and provider prescriptions to evaluate the additive effect on the risk of breast cancer of the type of progestogen (micronized progesterone or synthetic progestins) when combined with estradiol for the treatment of menopausal symptoms.9 A cohort of 561,379 women was included in the case-control study (10:1 ratio), 43,183 in the case group (patients diagnosed with invasive breast cancer), and 431,830 in the matched control group.

Overall, in the stratified analysis, a small but significant increase in the risk of breast cancer was found in ever users of menopausal HT (odds ratio [OR], 1.12; 95% confidence interval [CI], 1.09–1.15). Neither estradiol (OR, 1.04; 95% CI, 1.00–1.09) nor CEE (OR, 1.01; 95% CI, 0.96–1.06) was associated with an elevated risk of being diagnosed with invasive breast cancer. Of note, no elevated risk of breast cancer was associated with combination estrogen-progesterone therapy. However, the risk of breast cancer for women who had used synthetic progestins, mostly MPA, was significantly elevated (OR, 1.28; 95% CI, 1.22-1.35). Notably, this modestly elevated odds ratio with the use of estrogen-progestin HT is almost identical to that observed with CEE/ MPA in the WHI.1 Similar findings were found in women aged 50 to 60 years.

The adjusted analyses from the large WHI RCTs provide additional support: the synthetic progestin MPA combined with CEE showed a higher risk of breast cancer than CEE alone in women with prior hysterectomy.10

In the long-term follow-up of the WHI RCTs, after a median of 20.3 years postrandomization, prior randomization to CEE alone for postmenopausal women with prior hysterectomy was associated with a significantly lowered risk of breast cancer incidence and mortality.11 By contrast, prior randomization to CEE plus MPA (EPT) for women with an intact uterus was associated with a small but significantly increased incidence of breast cancer but no significant difference in breast cancer mortality.

In the French E3N EPIC population-based prospective cohort study, Fournier and colleagues4,5 found that women who received estrogen combined with synthetic progestins (mostly MPA) had a higher risk of breast cancer, with an age-adjusted relative risk of 1.4 (95% CI, 1.2–1.7), a finding not seen in women who received estrogen combined with micronized progesterone, similar to findings by Cordina-Duverger and colleagues and Simin and colleagues.12,13 In the E3N study, only 948 women were identified with breast cancer; 268 of these had used synthetic progestins.4,5

Both the Abenhaim cohort9 and the longterm outcomes of WHI RCT trial data11 found a significant contributing effect of MPA (synthetic progestin) in the risk of breast cancer. Progestogens are not thought to exert a class effect. Although it is clear that progestogens (progesterone or progestins) prevent estrogeninduced endometrial neoplasia when dosed adequately, different types of progestogens have a differential risk of breast epithelium proliferation and carcinogenic potential.14 A systematic review by Stute and colleagues found that micronized progesterone did not appear to alter mammographic breast density assessments or breast biopsy results.15

Prescribing progesterone as part of combination menopausal hormone therapy: Practical considerations

Progesterone capsules, available in generic form in 100-mg and 200-mg doses, are formulated with peanut oil, and they should be taken at bedtime as progesterone can induce drowsiness.

When combined with standard-dose estrogen, including oral estradiol 1.0 mg, transdermal estradiol 0.05 mg, or oral conjugated equine estrogen 0.625 mg, the appropriate dose of progesterone is 100 mg if used continuously or 200 mg if used as cyclic therapy. With higher doses of estrogen, progesterone 200 mg should be taken continuously.

An oral formulation that combines estradiol 1 mg and progesterone 100 mg does not contain peanut oil and, accordingly, can be used safely by those with peanut allergies. This combination product is marketed under the name Bijuva (TherapeuticsMD, Boca Raton, Florida).1

Reference

1. Lobo RA, Archer DF, Kagan R, et al. A 17β-estradiol-progesterone oral capsule for vasomotor symptoms in postmenopausal women: a randomized controlled trial. Obstet Gynecol. 2018;132:161-170. doi: 10.1097/AOG.0000000000002645. Erratum in: Obstet Gynecol. 2018;132:786.

Race considerations

The study by Abenhaim and colleagues was unable to address the issues of race or ethnicity.9 However, in the racially diverse WHI trial of women with prior hysterectomy, estrogen-alone use significantly reduced breast cancer incidence in all participants.10,16 Post hoc analysis of the 1,616 Black women with prior hysterectomy in the WHI RCT showed a significantly decreased breast cancer incidence with use of estrogen alone (hazard ratio [HR], 0.47; 95% CI, 0.26–0.82).1 When race was evaluated in the long-term cumulative follow-up of the WHI trial, estrogen-alone use significantly reduced breast cancer incidence in Black women, with no adverse effect on coronary heart disease, global index, or all-cause mortality, and with fewer cases of venous thromboembolism.17 The global index findings were favorable for Black women in their 50s and those with vasomotor symptoms.

Continue to: Impact of HT in women with an elevated risk of breast cancer...

 

 

Impact of HT in women with an elevated risk of breast cancer

Abenhaim and colleagues could not evaluate the effect of HT in women with a baseline elevated risk of breast cancer.9 For these women, HT may be recommended after premature surgical menopause due to increased risks for coronary heart disease, osteoporosis, genitourinary syndrome of menopause, and cognitive changes when estrogen is not taken postsurgery through to at least the average age of menopause, considered age 51.18,19

Marchetti and colleagues reviewed 3 clinical trials that assessed breast cancer events in 1,100 BRCA gene mutation carriers with intact breasts who underwent risk-reducing salpingo-oophorectomy (RRSO) who used or did not use HT.20 For BRCA1 and BRCA2 mutation carriers who received HT after RRSO, no elevated risk of breast cancer risk was seen (HR, 0.98; 95% CI, 0.63–1.52). There was a nonsignificant reduction in breast cancer risk for the estrogen-alone users compared with EPT HT (OR, 0.53; 95% CI, 0.25–1.15). Thus, short-term use of HT, estrogen alone or EPT, does not appear to elevate the risk of breast cancer after RRSO in these high-risk women.

 

Individualizing HT  for menopausal symptoms

The data presented provide reassuring evidence that longer-term use of ET does not appear to increase breast cancer risk, regardless of the type of estrogen (CEE or estradiol).4,5,9,11 For women with a uterus, micronized progesterone has less (if any) effect on breast cancer risk. By contrast, the use of synthetic progestins (such as MPA), when combined with estrogen, has been associated with a small but real increased breast cancer risk.

The most evident benefit of HT is in treating vasomotor symptoms and preventing bone loss for those at elevated risk in healthy women without contraindications who initiate systemic HT when younger than age 60 or within 10 years of menopause onset. Benefit and risk ratio depends on age and time from menopause onset when HT is initiated. Hormone therapy safety varies depending on type, dose, duration, route of administration, timing of initiation, and whether, and type, of progestogen is used. Transdermal estradiol, particularly when dosed at 0.05 mg or less, has been shown to have less thrombotic and stroke risk than oral estrogen.21

Individualizing treatment includes using the best available evidence to maximize benefits and minimize risks, with periodic reevaluation of benefits and risks of continuing or discontinuing HT or changing to lower doses. ObGyns who follow best practices in prescribing systemic HT can now help menopausal patients with bothersome symptoms take advantage of systemic HT’s benefits while providing reassurance regarding menopausal HT’s safety.18 Transdermal therapy is a safer option for women at elevated baseline risk of venous thrombosis (for example, obese women) and older patients. Likewise, given its safety with respect to risk of breast cancer, the use of micronized progesterone over synthetic progestins should be considered when prescribing EPT to women with an intact uterus.

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE

We can replace fear of HT with evidence-based discussions.22 For women with prior hysterectomy who have menopausal symptoms that impact their quality of life, ET at menopause does not appear to increase the risk of breast cancer. For women with an intact uterus who are considering use of estrogen and progestogen, extended-duration use of combination HT with synthetic progestins slightly elevates the risk of breast cancer, while the use of micronized progesterone does not appear to elevate breast cancer risk. Likewise, transdermal estrogen does not appear to elevate thrombosis risk.

 

 

Continue to: Benefits of avoiding BSO in women at average risk of ovarian cancer...

 

 

 

Benefits of avoiding BSO in women at average risk of ovarian cancer

Erickson Z, Rocca WA, Smith CY, et al. Time trends in unilateral and bilateral oophorectomy in a geographically defined American population. Obstet Gynecol. 2022;139:724-734. doi: 10.1097/ AOG.0000000000004728.

In 2005, gynecologist William Parker, MD, and colleagues used modeling methodology to assess the long-term risks and benefits of performing bilateral salpingo-oophorectomy (BSO) at the time of hysterectomy for benign disease in women at average risk for ovarian cancer.23 They concluded that practicing ovarian conservation until age 65 increased women’s long-term survival. Among their findings were that women with BSO before age 55 had an 8.6% excess overall mortality by age 80, while those with oophorectomy before age 59 had 3.9% excess mortality. They noted a sustained, but decreasing, mortality benefit until the age of 75 and stated that at no age did their model suggest higher mortality in women who chose ovarian conservation. Parker and colleagues concluded that ovarian conservation until at least age 65 benefited long-term survival for women at average risk for ovarian cancer when undergoing hysterectomy for benign disease.23

Certain risks decreased, others increased

A second report in 2009 by Parker and colleagues from the large prospective Nurses’ Health Study found that, while BSO at the time of hysterectomy for benign disease was associated with a decreased risk of breast and ovarian cancer, BSO was associated with an increased risk of all-cause mortality, fatal and nonfatal coronary heart disease, and lung cancer.24 Similar to the findings of the 2005 report, the authors noted that in no analysis or age group was BSO associated with increased survival. They also noted that compared with those who underwent BSO before age 50 and used ET, women with no history of ET use had an approximately 2-fold elevated risk of new onset coronary heart disease (HR, 1.98; 95% CI, 1.18–3.32).24

In 2007, Walter Rocca, MD, a Mayo Clinic neurologist with a particular interest in the epidemiology of dementia, and colleagues at the Mayo Clinic published results of a study that assessed a cohort of women who had undergone unilateral oophorectomy or BSO prior to the onset of menopause.25 The risk of cognitive impairment or dementia was higher in these women compared with women who had intact ovaries (HR, 1.46; 95% CI, 1.13-1.90). Of note, this elevated risk was confined to those who underwent oophorectomy before 49 years of age and were not prescribed estrogen until age 50 or older.25

In a subsequent publication, Rocca and colleagues pointed out that BSO prior to menopause not only is associated with higher rates of all-cause mortality and cognitive impairment but also with coronary heart disease, parkinsonism, osteoporosis, and other chronic conditions associated with aging, including metabolic, mental health, and arthritic disorders.26

Oophorectomy trends tracked

Given these and other reports27 that highlighted the health risks of premenopausal BSO in women at average risk for ovarian cancer, Rocca and colleagues recently assessed trends in the occurrence of unilateral oophorectomy or BSO versus ovarian conservation among all women residing in the Minnesota county (Olmsted) in which Mayo Clinic is located, and who underwent gynecologic surgery between 1950 and 2018.28

The investigators limited their analysis to women who had undergone unilateral oophorectomy or BSO between ages 18 and 49 years (these women are assumed to have been premenopausal). The authors considered as indications for oophorectomy primary or metastatic ovarian cancer, risk-reducing BSO for women at elevated risk for ovarian cancer (for example, strong family history or known BRCA gene mutation), adnexal mass, endometriosis, torsion, and other benign gynecologic conditions that included pelvic pain, abscess, oophoritis, or ectopic pregnancy. When more than 1 indication for ovarian surgery was present, the authors used the most clinically important indication. Unilateral oophorectomy or BSO was considered not indicated if the surgery was performed during another primary procedure (usually hysterectomy) without indication, or if the surgeon referred to the ovarian surgery as elective.

Results. Among 5,154 women who had oophorectomies between 1950 and 2018, the proportion of these women who underwent unilateral oophorectomy and BSO was 40.6% and 59.4%, respectively.

For most years between 1950 and 1979, the incidence of unilateral oophorectomy was higher than BSO. However, from 1980 to 2004, the incidence of BSO increased more than 2-fold while the incidence of unilateral surgery declined. After 2005, however, both types of ovarian surgery declined. During the years 2005–2018, a marked decline in BSO occurred, with the reduced incidence in premenopausal BSO most notable among women undergoing hysterectomy or those without an indication for oophorectomy.

Historically, ObGyns were taught that the benefits of removing normal ovaries (to prevent ovarian cancer) in average-risk women at the time of hysterectomy outweighed the risks. We agree with the authors’ speculation that beginning with Parker’s 2005 publication,23 ObGyns have become more conservative in performing unindicated BSO in women at average risk for ovarian cancer, now recognizing that the harms of this procedure often outweigh any benefits.28

Women with BRCA1 and BRCA2 gene mutations are at elevated risk for ovarian, tubal, and breast malignancies. In this population, risk-reducing BSO dramatically lowers future risk of ovarian and tubal cancer.

Data addressing the effect of RRSO in BRCA1 and BRCA2 gene mutation carriers continue to be evaluated, with differences between the 2 mutations, but they suggest that the surgery reduces not only ovarian cancer and tubal cancer but also possibly breast cancer.29

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE
Many of our patients are fearful regarding the possibility that they could be diagnosed with breast or ovarian cancer, and in their minds, fears regarding these 2 potentially deadly diseases outweigh concerns about more common causes of death in women, including cardiovascular disease. Accordingly, counseling women at average risk for ovarian cancer who are planning hysterectomy for benign indications can be challenging. In recent years, ObGyns have increasingly been performing opportunistic bilateral salpingectomy (OS) in women at average risk of ovarian cancer at the time of hysterectomy for benign disease. It is important to note that the studies we refer to in this Update addressed BSO, not OS. We hope that the findings we have reviewed here assist clinicians in helping women to understand the risks and benefits associated with premenopausal BSO and the need to discuss the pros and cons of HT for these women before surgery.

 

Continue to: Trends show decline in ET use in surgically menopausal women... 

 

 

 

Trends show decline in ET use in surgically menopausal women 

Suzuki Y, Huang Y, Melamed A, et al. Use of estrogen therapy after surgical menopause in women who are premenopausal. Obstet Gynecol. 2022;139:756-763. doi: 10.1097/AOG.0000000000004762.

In addition to highlighting the risks associated with premenopausal BSO in women at average risk for ovarian cancer, the reports referred to above also underscore that the use of replacement menopausal HT in premenopausal women who undergo BSO prevents morbidity and mortality that otherwise accompanies surgical menopause. In addition, the North American Menopause Society (NAMS) recommends replacement menopausal HT in the setting of induced early menopause when no contraindications are present.18

To assess the prevalence of HT use in surgically menopausal women, investigators at Columbia University College of Physicians and Surgeons used a national database that captures health insurance claims for some 280 million US patients, focusing on women aged 18 to 50 years who underwent BSO from 2008 to 2019.30 The great majority of women in this database have private insurance. Although the authors used the term estrogen therapy in their article, this term refers to systemic estrogen alone or with progestogen, as well as vaginal ET (personal communication with Jason Wright, MD, a coauthor of the study, May 19, 2022). In this Update section, we use the term HT to include use of any systemic HT or vaginal estrogen.

 

Prevalence of HT use changed over time period and patient age range

Among almost 61,980 evaluable women who had undergone BSO (median age, 45 years; 75.1% with concomitant hysterectomy; median follow-up time, 27 months), with no history of gynecologic or breast cancer, HT was used within 3 years of BSO by 64.5%. The highest percentage of women in this cohort who used HT peaked in 2008 (69.5%), declining to 58.2% by 2016. The median duration of HT use was 5.3 months. The prevalence of HT use 3 years after BSO declined with age, from 79.1% in women aged 18–29 to 60.0% in women aged 45–50.30

This report, published in the June 2022 issue of Obstetrics and Gynecology, makes several sobering observations: Many surgically menopausal women aged 50 years and younger are not prescribed HT, the proportion of such women receiving a prescription for HT is declining over time, and the duration of HT use following BSO is short. ●

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE
As ObGyn physicians, we can play an important role by educating healthy women with induced menopause who are younger than the average age of spontaneous menopause, and who have no contraindications, that the benefits of HT far outweigh risks. Many of these women will benefit from longer-term HT, using doses substantially higher than are used in women who undergo spontaneous menopause.31,32 After reaching the age of menopause, healthy women without contraindications may continue to benefit from HT into their 50s or beyond if they have vasomotor symptoms, bone loss, or other indications for treatment.18,19

 

References
  1. Chlebowski RT, Hendrix SL, Langer RD, et al; WHI Investigators. Influence of estrogen plus progestin on breast cancer and mammography in healthy postmenopausal women: the Women’s Health Initiative randomized trial. JAMA. 2003;289:3243-3253. doi: 10.1001/jama.289.24.3243.
  2. Anderson GL, Limacher M, Assaf AR, et al; Women’s Health Initiative Steering Committee. Effects of conjugated equine estrogen in postmenopausal women with hysterectomy: the Women’s Health Initiative randomized controlled trial. JAMA. 2004;291:1701-1712. doi: 10.1001/jama.291.14.1701.
  3. Opatrny L, Dell’Aniello S, Assouline S, et al. Hormone replacement therapy use and variations in the risk of breast cancer. BJOG. 2008;115:169-175. doi: 10.1111/j.14710528.2007.01520.x.
  4. Fournier A, Berrino F, Riboli E, et al. Breast cancer risk in relation to different types of hormone replacement therapy in the E3N-EPIC cohort. Int J Cancer. 2005;114:448-454. doi: 10.1002/ijc.20710.
  5. Fournier A, Berrino F, Clavel-Chapelon F. Unequal risks for breast cancer associated with different hormone replacement therapies: results from the E3N cohort study. Breast Cancer Res Treat. 2008;107:103-111. doi: 10.1007/s10549-007-9523-x.
  6. Beral V; Million Women Study Collaborators. Breast cancer and hormone-replacement therapy in the million women study. Lancet. 2003;362:419–27. doi: 10.1016/s01406736(03)14065-2.
  7. Yang Z, Hu Y, Zhang J, et al. Estradiol therapy and breast cancer risk in perimenopausal and postmenopausal women: a systematic review and meta-analysis. Gynecol Endocrinol. 2017;33:87-92. doi: 10.1080/09513590.2016.1248932.
  8. Asi N, Mohammed K, Haydour Q, et al. Progesterone vs synthetic progestins and the risk of breast cancer: a systematic review and meta-analysis. Syst Rev. 2016;5:121. doi: 10.1186/ s13643-016-0294-5.
  9. Abenhaim HA, Suissa S, Azoulay L, et al. Menopausal hormone therapy formulation and breast cancer risk. Obstet Gynecol. 2022;139:1103-1110. doi: 10.1097/AOG.0000000000004723.
  10. Chlebowski RT, Rohan TE, Manson JE, et al. Breast cancer after use of estrogen plus progestin and estrogen alone: analyses of data from 2 Women’s Health Initiative randomized clinical trials. JAMA Oncol. 2015;1:296-305. doi: 10.1001/ jamaoncol.2015.0494.
  11. Chlebowski RT, Anderson GL, Aragaki A, et al. Association of menopausal hormone therapy with breast cancer incidence and mortality during long-term follow-up of the Women’s Health Initiative randomized clinical trials. JAMA. 2020;324:369-380. doi: 10.1001/jama.2020.9482.
  12. Cordina-Duverger E, Truong T, Anger A, et al. Risk of breast cancer by type of menopausal hormone therapy: a case-control study among postmenopausal women in France. PLoS One. 2013;8:e78016. doi: 10.1371/journal.pone.0078016.
  13. Simin J, Tamimi R, Lagergren J, et al. Menopausal hormone therapy and cancer risk: an overestimated risk? Eur J Cancer. 2017;84:60–8. doi: 10.1016/j.ejca. 2017.07.012.
  14. Stanczyk FZ, Hapgood JP, Winer S, et al. Progestogens used in postmenopausal hormone therapy: differences in their pharmacological properties, intracellular actions, and clinical effects. Endocr Rev. 2013;34:171-208. doi: 10.1210/er.20121008.
  15. Stute P, Wildt L, Neulen J. The impact of micronized progesterone on breast cancer risk: a systematic review. Climacteric. 2018;21:111-122. doi: 10.1080/13697137.2017.1421925.
  16. Anderson GL, Chlebowski RT, Aragaki A, et al. Conjugated equine oestrogen and breast cancer incidence and mortality in postmenopausal women with hysterectomy: extended follow-up of the Women’s Health Initiative randomised placebo-controlled trial. Lancet Oncol. 2012;13:476-486. doi: 10.1016/S1470-2045(12)70075-X.
  17. Chlebowski RT, Barrington W, Aragaki AK, et al. Estrogen alone and health outcomes in black women by African ancestry: a secondary analyses of a randomized controlled trial. Menopause. 2017;24:133-141. doi: 10.1097/ GME.0000000000000733.
  18. The NAMS 2017 Hormone Therapy Position Statement Advisory Panel. The 2017 hormone therapy position statement of The North American Menopause Society. Menopause. 2017;24:728-753. doi: 10.1097/GME.0000000000000921.
  19. Pinkerton JV. Hormone therapy for postmenopausal women. N Engl J Med. 2020;382(5):446-455. doi: 10.1056/ NEJMcp1714787.
  20. Marchetti C, De Felice F, Boccia S, et al. Hormone replacement therapy after prophylactic risk-reducing salpingooophorectomy and breast cancer risk in BRCA1 and BRCA2 mutation carriers: a meta-analysis. Crit Rev Oncol Hematol. 2018;132:111-115. doi: 10.1016/j.critrevonc.2018.09.018.
  21.  Vinogradova Y, Coupland C, Hippisley-Cox J. Use of hormone replacement therapy and risk of venous thromboembolism: nested case-control studies using the QResearch and CPRD databases. BMJ. 2019;364:k4810. doi: 10.1136/bmj.k4810.
  22. Pinkerton JV. Hormone therapy: key points from NAMS 2017 Position Statement. Clin Obstet Gynecol. 2018;61:447453. doi: 10.1097/GRF.0000000000000383.
  23. Parker WH, Broder MS, Liu Z, et al. Ovarian conservation at the time of hysterectomy for benign disease. Obstet Gynecol. 2005;106:219-226. doi: 10.1097/01. AOG.0000167394.38215.56.
  24. Parker WH, Broder MS, Chang E, et al. Ovarian conservation at the time of hysterectomy and long-term health outcomes in the Nurses’ Health Study. Obstet Gynecol. 2009;113:10271037. doi: 10.1097/AOG.0b013e3181a11c64.
  25. Rocca WA, Bower JH, Maraganore DM, et al. Increased risk of cognitive impairment or dementia in women who underwent oophorectomy before menopause. Neurology. 2007;69:10741083. doi: 10.1212/01.wnl.0000276984.19542.e6.
  26. Rocca WA, Gazzuola Rocca L, Smith CY, et al Loss of ovarian hormones and accelerated somatic and mental aging. Physiology (Bethesda). 2018;33:374-383. doi: 10.1152/ physiol.00024.2018.
  27. Mytton J, Evison F, Chilton PJ, et al. Removal of all ovarian tissue versus conserving ovarian tissue at time of hysterectomy in premenopausal patients with benign disease: study using routine data and data linkage. BMJ. 2017;356:j372. doi: 10.1136/bmj.j372.
  28. Erickson Z, Rocca WA, Smith CY, et al. Time trends in unilateral and bilateral oophorectomy in a geographically defined American population. Obstet Gynecol. 2022;139:724-734. doi: 10.1097/AOG.0000000000004728.
  29. Choi YH, Terry MB, Daly MB, et al. Association of risk-reducing salpingo-oophorectomy with breast cancer risk in women with BRCA1 and BRCA2 pathogenic variants. JAMA Oncol. 2021;7:585-592. doi: 10.1001/jamaoncol.2020 .7995.
  30. Suzuki Y, Huang Y, Melamed A, et al. Use of estrogen therapy after surgical menopause in women who are premenopausal. Obstet Gynecol. 2022;139:756-763. doi: 10.1097/ AOG.0000000000004762.
  31. Faubion S, Kaunitz AM, Kapoor E. HT for women who have had BSO before the age of natural menopause: discerning the nuances. OBG Manag. 2022;34(2):20-27, 45. doi: 10.12788/ obgm.0174.
  32. Kaunitz AM, Kapoor E, Faubion S. Treatment of women after bilateral salpingo-oophorectomy performed prior to natural menopause. JAMA. 2021;326:1429-1430. doi: 10.1001/ jama.2021.3305.
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Andrew M. Kaunitz, MD, NCMP

Dr. Kaunitz is Tenured Professor and Associate Chair, Department of Obstetrics and Gynecology, University of Florida College of Medicine–Jacksonville; and Medical Director and Director of Menopause and Gynecologic Ultrasound Services, University of Florida Health Women’s Specialist Services–Emerson, Jacksonville. He serves on the  OBG Management Board of Editors.

JoAnn Pinkerton, MD, NCMP

Dr. Pinkerton is Division Director, Midlife Health Center, and Professor, Department of Obstetrics and Gynecology, University of Virginia Health, Charlottesville, Virginia. She serves on the OBG Management Board of Editors.

Dr. Kaunitz reports that his institution receives financial support from Bayer for ongoing clinical trials. Dr. Pinkerton reports participating in a multicenter clinical trial on nonhormone therapy for hot flashes, for which the University of Virginia received financial support from Bayer.

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Andrew M. Kaunitz, MD, NCMP

Dr. Kaunitz is Tenured Professor and Associate Chair, Department of Obstetrics and Gynecology, University of Florida College of Medicine–Jacksonville; and Medical Director and Director of Menopause and Gynecologic Ultrasound Services, University of Florida Health Women’s Specialist Services–Emerson, Jacksonville. He serves on the  OBG Management Board of Editors.

JoAnn Pinkerton, MD, NCMP

Dr. Pinkerton is Division Director, Midlife Health Center, and Professor, Department of Obstetrics and Gynecology, University of Virginia Health, Charlottesville, Virginia. She serves on the OBG Management Board of Editors.

Dr. Kaunitz reports that his institution receives financial support from Bayer for ongoing clinical trials. Dr. Pinkerton reports participating in a multicenter clinical trial on nonhormone therapy for hot flashes, for which the University of Virginia received financial support from Bayer.

Author and Disclosure Information

Andrew M. Kaunitz, MD, NCMP

Dr. Kaunitz is Tenured Professor and Associate Chair, Department of Obstetrics and Gynecology, University of Florida College of Medicine–Jacksonville; and Medical Director and Director of Menopause and Gynecologic Ultrasound Services, University of Florida Health Women’s Specialist Services–Emerson, Jacksonville. He serves on the  OBG Management Board of Editors.

JoAnn Pinkerton, MD, NCMP

Dr. Pinkerton is Division Director, Midlife Health Center, and Professor, Department of Obstetrics and Gynecology, University of Virginia Health, Charlottesville, Virginia. She serves on the OBG Management Board of Editors.

Dr. Kaunitz reports that his institution receives financial support from Bayer for ongoing clinical trials. Dr. Pinkerton reports participating in a multicenter clinical trial on nonhormone therapy for hot flashes, for which the University of Virginia received financial support from Bayer.

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This year’s Menopause Update focuses on 2 menopause-related issues relevant to ObGyns and our menopausal patients:

  • choosing the safest regimens, particularly with respect to risk of breast cancer, when prescribing hormone therapy (HT) to menopausal women
  • reviewing the risks and benefits of premenopausal bilateral salpingo-oophorectomy and the pros and cons of replacement HT in surgically menopausal patients.

We hope that you find this updated information useful as you care for menopausal women.

Revisiting menopausal HT  and the risk of breast cancer:  What we know now

Abenhaim HA, Suissa S,  Azoulay L, et al. Menopausal hormone therapy formulation and breast cancer risk. Obstet Gynecol. 2022;139:1103-1110. doi: 10.1097/AOG.0000000000004723.

Reevaluation of the Women’s Health Initiative randomized controlled trials (WHI RCTs), long-term (median follow-up more than 20 years) cumulative  follow-up data, and results from additional studies have suggested that estrogen therapy (ET) alone in menopausal women with prior hysterectomy does not increase the risk of breast cancer. By contrast, estrogen with progestin (synthetic progestogens that include medroxyprogesterone acetate [MPA] and norethindrone acetate) slightly increases the risk of breast cancer. In the past 10 years, several publications have shed light on whether the type of progestogen affects the risk of breast cancer and can help provide evidence-based information to guide clinicians.

 

Breast cancer risk with combined HT and synthetic progestin

In the first part of the WHI RCT, women were randomly assigned to receive either conjugated equine estrogen (CEE) plus synthetic progestin (MPA) or a placebo. Combined estrogen-progestin therapy (EPT) was associated with a modestly elevated risk of breast cancer.1 In the second part of the WHI trial, CEE only (estrogen alone, ET) was compared with placebo among women with prior  hysterectomy, with no effect found on breast cancer incidence.2

Most older observational studies published in 2003 to 2005 found that neither CEE nor estradiol appeared to increase the risk of breast cancer when used alone.3-5 However, estrogen use in combination with synthetic progestins (MPA, norethindrone, levonorgestrel, and norgestrel) has been associated with an increased risk of breast cancer,4,6 while the elevated risk of breast cancer with micronized progesterone has been less substantial.7,8

Continue to: Newer data suggest the type of progestogen used affects risk...

 

 

Newer data suggest the type of progestogen used affects risk

In a report published in the June 2022 issue of Obstetrics and Gynecology, Abenhaim and colleagues used a nested population-based case-control study of administrative data available in the UK Clinical Practice Research Datalink and provider prescriptions to evaluate the additive effect on the risk of breast cancer of the type of progestogen (micronized progesterone or synthetic progestins) when combined with estradiol for the treatment of menopausal symptoms.9 A cohort of 561,379 women was included in the case-control study (10:1 ratio), 43,183 in the case group (patients diagnosed with invasive breast cancer), and 431,830 in the matched control group.

Overall, in the stratified analysis, a small but significant increase in the risk of breast cancer was found in ever users of menopausal HT (odds ratio [OR], 1.12; 95% confidence interval [CI], 1.09–1.15). Neither estradiol (OR, 1.04; 95% CI, 1.00–1.09) nor CEE (OR, 1.01; 95% CI, 0.96–1.06) was associated with an elevated risk of being diagnosed with invasive breast cancer. Of note, no elevated risk of breast cancer was associated with combination estrogen-progesterone therapy. However, the risk of breast cancer for women who had used synthetic progestins, mostly MPA, was significantly elevated (OR, 1.28; 95% CI, 1.22-1.35). Notably, this modestly elevated odds ratio with the use of estrogen-progestin HT is almost identical to that observed with CEE/ MPA in the WHI.1 Similar findings were found in women aged 50 to 60 years.

The adjusted analyses from the large WHI RCTs provide additional support: the synthetic progestin MPA combined with CEE showed a higher risk of breast cancer than CEE alone in women with prior hysterectomy.10

In the long-term follow-up of the WHI RCTs, after a median of 20.3 years postrandomization, prior randomization to CEE alone for postmenopausal women with prior hysterectomy was associated with a significantly lowered risk of breast cancer incidence and mortality.11 By contrast, prior randomization to CEE plus MPA (EPT) for women with an intact uterus was associated with a small but significantly increased incidence of breast cancer but no significant difference in breast cancer mortality.

In the French E3N EPIC population-based prospective cohort study, Fournier and colleagues4,5 found that women who received estrogen combined with synthetic progestins (mostly MPA) had a higher risk of breast cancer, with an age-adjusted relative risk of 1.4 (95% CI, 1.2–1.7), a finding not seen in women who received estrogen combined with micronized progesterone, similar to findings by Cordina-Duverger and colleagues and Simin and colleagues.12,13 In the E3N study, only 948 women were identified with breast cancer; 268 of these had used synthetic progestins.4,5

Both the Abenhaim cohort9 and the longterm outcomes of WHI RCT trial data11 found a significant contributing effect of MPA (synthetic progestin) in the risk of breast cancer. Progestogens are not thought to exert a class effect. Although it is clear that progestogens (progesterone or progestins) prevent estrogeninduced endometrial neoplasia when dosed adequately, different types of progestogens have a differential risk of breast epithelium proliferation and carcinogenic potential.14 A systematic review by Stute and colleagues found that micronized progesterone did not appear to alter mammographic breast density assessments or breast biopsy results.15

Prescribing progesterone as part of combination menopausal hormone therapy: Practical considerations

Progesterone capsules, available in generic form in 100-mg and 200-mg doses, are formulated with peanut oil, and they should be taken at bedtime as progesterone can induce drowsiness.

When combined with standard-dose estrogen, including oral estradiol 1.0 mg, transdermal estradiol 0.05 mg, or oral conjugated equine estrogen 0.625 mg, the appropriate dose of progesterone is 100 mg if used continuously or 200 mg if used as cyclic therapy. With higher doses of estrogen, progesterone 200 mg should be taken continuously.

An oral formulation that combines estradiol 1 mg and progesterone 100 mg does not contain peanut oil and, accordingly, can be used safely by those with peanut allergies. This combination product is marketed under the name Bijuva (TherapeuticsMD, Boca Raton, Florida).1

Reference

1. Lobo RA, Archer DF, Kagan R, et al. A 17β-estradiol-progesterone oral capsule for vasomotor symptoms in postmenopausal women: a randomized controlled trial. Obstet Gynecol. 2018;132:161-170. doi: 10.1097/AOG.0000000000002645. Erratum in: Obstet Gynecol. 2018;132:786.

Race considerations

The study by Abenhaim and colleagues was unable to address the issues of race or ethnicity.9 However, in the racially diverse WHI trial of women with prior hysterectomy, estrogen-alone use significantly reduced breast cancer incidence in all participants.10,16 Post hoc analysis of the 1,616 Black women with prior hysterectomy in the WHI RCT showed a significantly decreased breast cancer incidence with use of estrogen alone (hazard ratio [HR], 0.47; 95% CI, 0.26–0.82).1 When race was evaluated in the long-term cumulative follow-up of the WHI trial, estrogen-alone use significantly reduced breast cancer incidence in Black women, with no adverse effect on coronary heart disease, global index, or all-cause mortality, and with fewer cases of venous thromboembolism.17 The global index findings were favorable for Black women in their 50s and those with vasomotor symptoms.

Continue to: Impact of HT in women with an elevated risk of breast cancer...

 

 

Impact of HT in women with an elevated risk of breast cancer

Abenhaim and colleagues could not evaluate the effect of HT in women with a baseline elevated risk of breast cancer.9 For these women, HT may be recommended after premature surgical menopause due to increased risks for coronary heart disease, osteoporosis, genitourinary syndrome of menopause, and cognitive changes when estrogen is not taken postsurgery through to at least the average age of menopause, considered age 51.18,19

Marchetti and colleagues reviewed 3 clinical trials that assessed breast cancer events in 1,100 BRCA gene mutation carriers with intact breasts who underwent risk-reducing salpingo-oophorectomy (RRSO) who used or did not use HT.20 For BRCA1 and BRCA2 mutation carriers who received HT after RRSO, no elevated risk of breast cancer risk was seen (HR, 0.98; 95% CI, 0.63–1.52). There was a nonsignificant reduction in breast cancer risk for the estrogen-alone users compared with EPT HT (OR, 0.53; 95% CI, 0.25–1.15). Thus, short-term use of HT, estrogen alone or EPT, does not appear to elevate the risk of breast cancer after RRSO in these high-risk women.

 

Individualizing HT  for menopausal symptoms

The data presented provide reassuring evidence that longer-term use of ET does not appear to increase breast cancer risk, regardless of the type of estrogen (CEE or estradiol).4,5,9,11 For women with a uterus, micronized progesterone has less (if any) effect on breast cancer risk. By contrast, the use of synthetic progestins (such as MPA), when combined with estrogen, has been associated with a small but real increased breast cancer risk.

The most evident benefit of HT is in treating vasomotor symptoms and preventing bone loss for those at elevated risk in healthy women without contraindications who initiate systemic HT when younger than age 60 or within 10 years of menopause onset. Benefit and risk ratio depends on age and time from menopause onset when HT is initiated. Hormone therapy safety varies depending on type, dose, duration, route of administration, timing of initiation, and whether, and type, of progestogen is used. Transdermal estradiol, particularly when dosed at 0.05 mg or less, has been shown to have less thrombotic and stroke risk than oral estrogen.21

Individualizing treatment includes using the best available evidence to maximize benefits and minimize risks, with periodic reevaluation of benefits and risks of continuing or discontinuing HT or changing to lower doses. ObGyns who follow best practices in prescribing systemic HT can now help menopausal patients with bothersome symptoms take advantage of systemic HT’s benefits while providing reassurance regarding menopausal HT’s safety.18 Transdermal therapy is a safer option for women at elevated baseline risk of venous thrombosis (for example, obese women) and older patients. Likewise, given its safety with respect to risk of breast cancer, the use of micronized progesterone over synthetic progestins should be considered when prescribing EPT to women with an intact uterus.

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE

We can replace fear of HT with evidence-based discussions.22 For women with prior hysterectomy who have menopausal symptoms that impact their quality of life, ET at menopause does not appear to increase the risk of breast cancer. For women with an intact uterus who are considering use of estrogen and progestogen, extended-duration use of combination HT with synthetic progestins slightly elevates the risk of breast cancer, while the use of micronized progesterone does not appear to elevate breast cancer risk. Likewise, transdermal estrogen does not appear to elevate thrombosis risk.

 

 

Continue to: Benefits of avoiding BSO in women at average risk of ovarian cancer...

 

 

 

Benefits of avoiding BSO in women at average risk of ovarian cancer

Erickson Z, Rocca WA, Smith CY, et al. Time trends in unilateral and bilateral oophorectomy in a geographically defined American population. Obstet Gynecol. 2022;139:724-734. doi: 10.1097/ AOG.0000000000004728.

In 2005, gynecologist William Parker, MD, and colleagues used modeling methodology to assess the long-term risks and benefits of performing bilateral salpingo-oophorectomy (BSO) at the time of hysterectomy for benign disease in women at average risk for ovarian cancer.23 They concluded that practicing ovarian conservation until age 65 increased women’s long-term survival. Among their findings were that women with BSO before age 55 had an 8.6% excess overall mortality by age 80, while those with oophorectomy before age 59 had 3.9% excess mortality. They noted a sustained, but decreasing, mortality benefit until the age of 75 and stated that at no age did their model suggest higher mortality in women who chose ovarian conservation. Parker and colleagues concluded that ovarian conservation until at least age 65 benefited long-term survival for women at average risk for ovarian cancer when undergoing hysterectomy for benign disease.23

Certain risks decreased, others increased

A second report in 2009 by Parker and colleagues from the large prospective Nurses’ Health Study found that, while BSO at the time of hysterectomy for benign disease was associated with a decreased risk of breast and ovarian cancer, BSO was associated with an increased risk of all-cause mortality, fatal and nonfatal coronary heart disease, and lung cancer.24 Similar to the findings of the 2005 report, the authors noted that in no analysis or age group was BSO associated with increased survival. They also noted that compared with those who underwent BSO before age 50 and used ET, women with no history of ET use had an approximately 2-fold elevated risk of new onset coronary heart disease (HR, 1.98; 95% CI, 1.18–3.32).24

In 2007, Walter Rocca, MD, a Mayo Clinic neurologist with a particular interest in the epidemiology of dementia, and colleagues at the Mayo Clinic published results of a study that assessed a cohort of women who had undergone unilateral oophorectomy or BSO prior to the onset of menopause.25 The risk of cognitive impairment or dementia was higher in these women compared with women who had intact ovaries (HR, 1.46; 95% CI, 1.13-1.90). Of note, this elevated risk was confined to those who underwent oophorectomy before 49 years of age and were not prescribed estrogen until age 50 or older.25

In a subsequent publication, Rocca and colleagues pointed out that BSO prior to menopause not only is associated with higher rates of all-cause mortality and cognitive impairment but also with coronary heart disease, parkinsonism, osteoporosis, and other chronic conditions associated with aging, including metabolic, mental health, and arthritic disorders.26

Oophorectomy trends tracked

Given these and other reports27 that highlighted the health risks of premenopausal BSO in women at average risk for ovarian cancer, Rocca and colleagues recently assessed trends in the occurrence of unilateral oophorectomy or BSO versus ovarian conservation among all women residing in the Minnesota county (Olmsted) in which Mayo Clinic is located, and who underwent gynecologic surgery between 1950 and 2018.28

The investigators limited their analysis to women who had undergone unilateral oophorectomy or BSO between ages 18 and 49 years (these women are assumed to have been premenopausal). The authors considered as indications for oophorectomy primary or metastatic ovarian cancer, risk-reducing BSO for women at elevated risk for ovarian cancer (for example, strong family history or known BRCA gene mutation), adnexal mass, endometriosis, torsion, and other benign gynecologic conditions that included pelvic pain, abscess, oophoritis, or ectopic pregnancy. When more than 1 indication for ovarian surgery was present, the authors used the most clinically important indication. Unilateral oophorectomy or BSO was considered not indicated if the surgery was performed during another primary procedure (usually hysterectomy) without indication, or if the surgeon referred to the ovarian surgery as elective.

Results. Among 5,154 women who had oophorectomies between 1950 and 2018, the proportion of these women who underwent unilateral oophorectomy and BSO was 40.6% and 59.4%, respectively.

For most years between 1950 and 1979, the incidence of unilateral oophorectomy was higher than BSO. However, from 1980 to 2004, the incidence of BSO increased more than 2-fold while the incidence of unilateral surgery declined. After 2005, however, both types of ovarian surgery declined. During the years 2005–2018, a marked decline in BSO occurred, with the reduced incidence in premenopausal BSO most notable among women undergoing hysterectomy or those without an indication for oophorectomy.

Historically, ObGyns were taught that the benefits of removing normal ovaries (to prevent ovarian cancer) in average-risk women at the time of hysterectomy outweighed the risks. We agree with the authors’ speculation that beginning with Parker’s 2005 publication,23 ObGyns have become more conservative in performing unindicated BSO in women at average risk for ovarian cancer, now recognizing that the harms of this procedure often outweigh any benefits.28

Women with BRCA1 and BRCA2 gene mutations are at elevated risk for ovarian, tubal, and breast malignancies. In this population, risk-reducing BSO dramatically lowers future risk of ovarian and tubal cancer.

Data addressing the effect of RRSO in BRCA1 and BRCA2 gene mutation carriers continue to be evaluated, with differences between the 2 mutations, but they suggest that the surgery reduces not only ovarian cancer and tubal cancer but also possibly breast cancer.29

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE
Many of our patients are fearful regarding the possibility that they could be diagnosed with breast or ovarian cancer, and in their minds, fears regarding these 2 potentially deadly diseases outweigh concerns about more common causes of death in women, including cardiovascular disease. Accordingly, counseling women at average risk for ovarian cancer who are planning hysterectomy for benign indications can be challenging. In recent years, ObGyns have increasingly been performing opportunistic bilateral salpingectomy (OS) in women at average risk of ovarian cancer at the time of hysterectomy for benign disease. It is important to note that the studies we refer to in this Update addressed BSO, not OS. We hope that the findings we have reviewed here assist clinicians in helping women to understand the risks and benefits associated with premenopausal BSO and the need to discuss the pros and cons of HT for these women before surgery.

 

Continue to: Trends show decline in ET use in surgically menopausal women... 

 

 

 

Trends show decline in ET use in surgically menopausal women 

Suzuki Y, Huang Y, Melamed A, et al. Use of estrogen therapy after surgical menopause in women who are premenopausal. Obstet Gynecol. 2022;139:756-763. doi: 10.1097/AOG.0000000000004762.

In addition to highlighting the risks associated with premenopausal BSO in women at average risk for ovarian cancer, the reports referred to above also underscore that the use of replacement menopausal HT in premenopausal women who undergo BSO prevents morbidity and mortality that otherwise accompanies surgical menopause. In addition, the North American Menopause Society (NAMS) recommends replacement menopausal HT in the setting of induced early menopause when no contraindications are present.18

To assess the prevalence of HT use in surgically menopausal women, investigators at Columbia University College of Physicians and Surgeons used a national database that captures health insurance claims for some 280 million US patients, focusing on women aged 18 to 50 years who underwent BSO from 2008 to 2019.30 The great majority of women in this database have private insurance. Although the authors used the term estrogen therapy in their article, this term refers to systemic estrogen alone or with progestogen, as well as vaginal ET (personal communication with Jason Wright, MD, a coauthor of the study, May 19, 2022). In this Update section, we use the term HT to include use of any systemic HT or vaginal estrogen.

 

Prevalence of HT use changed over time period and patient age range

Among almost 61,980 evaluable women who had undergone BSO (median age, 45 years; 75.1% with concomitant hysterectomy; median follow-up time, 27 months), with no history of gynecologic or breast cancer, HT was used within 3 years of BSO by 64.5%. The highest percentage of women in this cohort who used HT peaked in 2008 (69.5%), declining to 58.2% by 2016. The median duration of HT use was 5.3 months. The prevalence of HT use 3 years after BSO declined with age, from 79.1% in women aged 18–29 to 60.0% in women aged 45–50.30

This report, published in the June 2022 issue of Obstetrics and Gynecology, makes several sobering observations: Many surgically menopausal women aged 50 years and younger are not prescribed HT, the proportion of such women receiving a prescription for HT is declining over time, and the duration of HT use following BSO is short. ●

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE
As ObGyn physicians, we can play an important role by educating healthy women with induced menopause who are younger than the average age of spontaneous menopause, and who have no contraindications, that the benefits of HT far outweigh risks. Many of these women will benefit from longer-term HT, using doses substantially higher than are used in women who undergo spontaneous menopause.31,32 After reaching the age of menopause, healthy women without contraindications may continue to benefit from HT into their 50s or beyond if they have vasomotor symptoms, bone loss, or other indications for treatment.18,19

 

This year’s Menopause Update focuses on 2 menopause-related issues relevant to ObGyns and our menopausal patients:

  • choosing the safest regimens, particularly with respect to risk of breast cancer, when prescribing hormone therapy (HT) to menopausal women
  • reviewing the risks and benefits of premenopausal bilateral salpingo-oophorectomy and the pros and cons of replacement HT in surgically menopausal patients.

We hope that you find this updated information useful as you care for menopausal women.

Revisiting menopausal HT  and the risk of breast cancer:  What we know now

Abenhaim HA, Suissa S,  Azoulay L, et al. Menopausal hormone therapy formulation and breast cancer risk. Obstet Gynecol. 2022;139:1103-1110. doi: 10.1097/AOG.0000000000004723.

Reevaluation of the Women’s Health Initiative randomized controlled trials (WHI RCTs), long-term (median follow-up more than 20 years) cumulative  follow-up data, and results from additional studies have suggested that estrogen therapy (ET) alone in menopausal women with prior hysterectomy does not increase the risk of breast cancer. By contrast, estrogen with progestin (synthetic progestogens that include medroxyprogesterone acetate [MPA] and norethindrone acetate) slightly increases the risk of breast cancer. In the past 10 years, several publications have shed light on whether the type of progestogen affects the risk of breast cancer and can help provide evidence-based information to guide clinicians.

 

Breast cancer risk with combined HT and synthetic progestin

In the first part of the WHI RCT, women were randomly assigned to receive either conjugated equine estrogen (CEE) plus synthetic progestin (MPA) or a placebo. Combined estrogen-progestin therapy (EPT) was associated with a modestly elevated risk of breast cancer.1 In the second part of the WHI trial, CEE only (estrogen alone, ET) was compared with placebo among women with prior  hysterectomy, with no effect found on breast cancer incidence.2

Most older observational studies published in 2003 to 2005 found that neither CEE nor estradiol appeared to increase the risk of breast cancer when used alone.3-5 However, estrogen use in combination with synthetic progestins (MPA, norethindrone, levonorgestrel, and norgestrel) has been associated with an increased risk of breast cancer,4,6 while the elevated risk of breast cancer with micronized progesterone has been less substantial.7,8

Continue to: Newer data suggest the type of progestogen used affects risk...

 

 

Newer data suggest the type of progestogen used affects risk

In a report published in the June 2022 issue of Obstetrics and Gynecology, Abenhaim and colleagues used a nested population-based case-control study of administrative data available in the UK Clinical Practice Research Datalink and provider prescriptions to evaluate the additive effect on the risk of breast cancer of the type of progestogen (micronized progesterone or synthetic progestins) when combined with estradiol for the treatment of menopausal symptoms.9 A cohort of 561,379 women was included in the case-control study (10:1 ratio), 43,183 in the case group (patients diagnosed with invasive breast cancer), and 431,830 in the matched control group.

Overall, in the stratified analysis, a small but significant increase in the risk of breast cancer was found in ever users of menopausal HT (odds ratio [OR], 1.12; 95% confidence interval [CI], 1.09–1.15). Neither estradiol (OR, 1.04; 95% CI, 1.00–1.09) nor CEE (OR, 1.01; 95% CI, 0.96–1.06) was associated with an elevated risk of being diagnosed with invasive breast cancer. Of note, no elevated risk of breast cancer was associated with combination estrogen-progesterone therapy. However, the risk of breast cancer for women who had used synthetic progestins, mostly MPA, was significantly elevated (OR, 1.28; 95% CI, 1.22-1.35). Notably, this modestly elevated odds ratio with the use of estrogen-progestin HT is almost identical to that observed with CEE/ MPA in the WHI.1 Similar findings were found in women aged 50 to 60 years.

The adjusted analyses from the large WHI RCTs provide additional support: the synthetic progestin MPA combined with CEE showed a higher risk of breast cancer than CEE alone in women with prior hysterectomy.10

In the long-term follow-up of the WHI RCTs, after a median of 20.3 years postrandomization, prior randomization to CEE alone for postmenopausal women with prior hysterectomy was associated with a significantly lowered risk of breast cancer incidence and mortality.11 By contrast, prior randomization to CEE plus MPA (EPT) for women with an intact uterus was associated with a small but significantly increased incidence of breast cancer but no significant difference in breast cancer mortality.

In the French E3N EPIC population-based prospective cohort study, Fournier and colleagues4,5 found that women who received estrogen combined with synthetic progestins (mostly MPA) had a higher risk of breast cancer, with an age-adjusted relative risk of 1.4 (95% CI, 1.2–1.7), a finding not seen in women who received estrogen combined with micronized progesterone, similar to findings by Cordina-Duverger and colleagues and Simin and colleagues.12,13 In the E3N study, only 948 women were identified with breast cancer; 268 of these had used synthetic progestins.4,5

Both the Abenhaim cohort9 and the longterm outcomes of WHI RCT trial data11 found a significant contributing effect of MPA (synthetic progestin) in the risk of breast cancer. Progestogens are not thought to exert a class effect. Although it is clear that progestogens (progesterone or progestins) prevent estrogeninduced endometrial neoplasia when dosed adequately, different types of progestogens have a differential risk of breast epithelium proliferation and carcinogenic potential.14 A systematic review by Stute and colleagues found that micronized progesterone did not appear to alter mammographic breast density assessments or breast biopsy results.15

Prescribing progesterone as part of combination menopausal hormone therapy: Practical considerations

Progesterone capsules, available in generic form in 100-mg and 200-mg doses, are formulated with peanut oil, and they should be taken at bedtime as progesterone can induce drowsiness.

When combined with standard-dose estrogen, including oral estradiol 1.0 mg, transdermal estradiol 0.05 mg, or oral conjugated equine estrogen 0.625 mg, the appropriate dose of progesterone is 100 mg if used continuously or 200 mg if used as cyclic therapy. With higher doses of estrogen, progesterone 200 mg should be taken continuously.

An oral formulation that combines estradiol 1 mg and progesterone 100 mg does not contain peanut oil and, accordingly, can be used safely by those with peanut allergies. This combination product is marketed under the name Bijuva (TherapeuticsMD, Boca Raton, Florida).1

Reference

1. Lobo RA, Archer DF, Kagan R, et al. A 17β-estradiol-progesterone oral capsule for vasomotor symptoms in postmenopausal women: a randomized controlled trial. Obstet Gynecol. 2018;132:161-170. doi: 10.1097/AOG.0000000000002645. Erratum in: Obstet Gynecol. 2018;132:786.

Race considerations

The study by Abenhaim and colleagues was unable to address the issues of race or ethnicity.9 However, in the racially diverse WHI trial of women with prior hysterectomy, estrogen-alone use significantly reduced breast cancer incidence in all participants.10,16 Post hoc analysis of the 1,616 Black women with prior hysterectomy in the WHI RCT showed a significantly decreased breast cancer incidence with use of estrogen alone (hazard ratio [HR], 0.47; 95% CI, 0.26–0.82).1 When race was evaluated in the long-term cumulative follow-up of the WHI trial, estrogen-alone use significantly reduced breast cancer incidence in Black women, with no adverse effect on coronary heart disease, global index, or all-cause mortality, and with fewer cases of venous thromboembolism.17 The global index findings were favorable for Black women in their 50s and those with vasomotor symptoms.

Continue to: Impact of HT in women with an elevated risk of breast cancer...

 

 

Impact of HT in women with an elevated risk of breast cancer

Abenhaim and colleagues could not evaluate the effect of HT in women with a baseline elevated risk of breast cancer.9 For these women, HT may be recommended after premature surgical menopause due to increased risks for coronary heart disease, osteoporosis, genitourinary syndrome of menopause, and cognitive changes when estrogen is not taken postsurgery through to at least the average age of menopause, considered age 51.18,19

Marchetti and colleagues reviewed 3 clinical trials that assessed breast cancer events in 1,100 BRCA gene mutation carriers with intact breasts who underwent risk-reducing salpingo-oophorectomy (RRSO) who used or did not use HT.20 For BRCA1 and BRCA2 mutation carriers who received HT after RRSO, no elevated risk of breast cancer risk was seen (HR, 0.98; 95% CI, 0.63–1.52). There was a nonsignificant reduction in breast cancer risk for the estrogen-alone users compared with EPT HT (OR, 0.53; 95% CI, 0.25–1.15). Thus, short-term use of HT, estrogen alone or EPT, does not appear to elevate the risk of breast cancer after RRSO in these high-risk women.

 

Individualizing HT  for menopausal symptoms

The data presented provide reassuring evidence that longer-term use of ET does not appear to increase breast cancer risk, regardless of the type of estrogen (CEE or estradiol).4,5,9,11 For women with a uterus, micronized progesterone has less (if any) effect on breast cancer risk. By contrast, the use of synthetic progestins (such as MPA), when combined with estrogen, has been associated with a small but real increased breast cancer risk.

The most evident benefit of HT is in treating vasomotor symptoms and preventing bone loss for those at elevated risk in healthy women without contraindications who initiate systemic HT when younger than age 60 or within 10 years of menopause onset. Benefit and risk ratio depends on age and time from menopause onset when HT is initiated. Hormone therapy safety varies depending on type, dose, duration, route of administration, timing of initiation, and whether, and type, of progestogen is used. Transdermal estradiol, particularly when dosed at 0.05 mg or less, has been shown to have less thrombotic and stroke risk than oral estrogen.21

Individualizing treatment includes using the best available evidence to maximize benefits and minimize risks, with periodic reevaluation of benefits and risks of continuing or discontinuing HT or changing to lower doses. ObGyns who follow best practices in prescribing systemic HT can now help menopausal patients with bothersome symptoms take advantage of systemic HT’s benefits while providing reassurance regarding menopausal HT’s safety.18 Transdermal therapy is a safer option for women at elevated baseline risk of venous thrombosis (for example, obese women) and older patients. Likewise, given its safety with respect to risk of breast cancer, the use of micronized progesterone over synthetic progestins should be considered when prescribing EPT to women with an intact uterus.

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE

We can replace fear of HT with evidence-based discussions.22 For women with prior hysterectomy who have menopausal symptoms that impact their quality of life, ET at menopause does not appear to increase the risk of breast cancer. For women with an intact uterus who are considering use of estrogen and progestogen, extended-duration use of combination HT with synthetic progestins slightly elevates the risk of breast cancer, while the use of micronized progesterone does not appear to elevate breast cancer risk. Likewise, transdermal estrogen does not appear to elevate thrombosis risk.

 

 

Continue to: Benefits of avoiding BSO in women at average risk of ovarian cancer...

 

 

 

Benefits of avoiding BSO in women at average risk of ovarian cancer

Erickson Z, Rocca WA, Smith CY, et al. Time trends in unilateral and bilateral oophorectomy in a geographically defined American population. Obstet Gynecol. 2022;139:724-734. doi: 10.1097/ AOG.0000000000004728.

In 2005, gynecologist William Parker, MD, and colleagues used modeling methodology to assess the long-term risks and benefits of performing bilateral salpingo-oophorectomy (BSO) at the time of hysterectomy for benign disease in women at average risk for ovarian cancer.23 They concluded that practicing ovarian conservation until age 65 increased women’s long-term survival. Among their findings were that women with BSO before age 55 had an 8.6% excess overall mortality by age 80, while those with oophorectomy before age 59 had 3.9% excess mortality. They noted a sustained, but decreasing, mortality benefit until the age of 75 and stated that at no age did their model suggest higher mortality in women who chose ovarian conservation. Parker and colleagues concluded that ovarian conservation until at least age 65 benefited long-term survival for women at average risk for ovarian cancer when undergoing hysterectomy for benign disease.23

Certain risks decreased, others increased

A second report in 2009 by Parker and colleagues from the large prospective Nurses’ Health Study found that, while BSO at the time of hysterectomy for benign disease was associated with a decreased risk of breast and ovarian cancer, BSO was associated with an increased risk of all-cause mortality, fatal and nonfatal coronary heart disease, and lung cancer.24 Similar to the findings of the 2005 report, the authors noted that in no analysis or age group was BSO associated with increased survival. They also noted that compared with those who underwent BSO before age 50 and used ET, women with no history of ET use had an approximately 2-fold elevated risk of new onset coronary heart disease (HR, 1.98; 95% CI, 1.18–3.32).24

In 2007, Walter Rocca, MD, a Mayo Clinic neurologist with a particular interest in the epidemiology of dementia, and colleagues at the Mayo Clinic published results of a study that assessed a cohort of women who had undergone unilateral oophorectomy or BSO prior to the onset of menopause.25 The risk of cognitive impairment or dementia was higher in these women compared with women who had intact ovaries (HR, 1.46; 95% CI, 1.13-1.90). Of note, this elevated risk was confined to those who underwent oophorectomy before 49 years of age and were not prescribed estrogen until age 50 or older.25

In a subsequent publication, Rocca and colleagues pointed out that BSO prior to menopause not only is associated with higher rates of all-cause mortality and cognitive impairment but also with coronary heart disease, parkinsonism, osteoporosis, and other chronic conditions associated with aging, including metabolic, mental health, and arthritic disorders.26

Oophorectomy trends tracked

Given these and other reports27 that highlighted the health risks of premenopausal BSO in women at average risk for ovarian cancer, Rocca and colleagues recently assessed trends in the occurrence of unilateral oophorectomy or BSO versus ovarian conservation among all women residing in the Minnesota county (Olmsted) in which Mayo Clinic is located, and who underwent gynecologic surgery between 1950 and 2018.28

The investigators limited their analysis to women who had undergone unilateral oophorectomy or BSO between ages 18 and 49 years (these women are assumed to have been premenopausal). The authors considered as indications for oophorectomy primary or metastatic ovarian cancer, risk-reducing BSO for women at elevated risk for ovarian cancer (for example, strong family history or known BRCA gene mutation), adnexal mass, endometriosis, torsion, and other benign gynecologic conditions that included pelvic pain, abscess, oophoritis, or ectopic pregnancy. When more than 1 indication for ovarian surgery was present, the authors used the most clinically important indication. Unilateral oophorectomy or BSO was considered not indicated if the surgery was performed during another primary procedure (usually hysterectomy) without indication, or if the surgeon referred to the ovarian surgery as elective.

Results. Among 5,154 women who had oophorectomies between 1950 and 2018, the proportion of these women who underwent unilateral oophorectomy and BSO was 40.6% and 59.4%, respectively.

For most years between 1950 and 1979, the incidence of unilateral oophorectomy was higher than BSO. However, from 1980 to 2004, the incidence of BSO increased more than 2-fold while the incidence of unilateral surgery declined. After 2005, however, both types of ovarian surgery declined. During the years 2005–2018, a marked decline in BSO occurred, with the reduced incidence in premenopausal BSO most notable among women undergoing hysterectomy or those without an indication for oophorectomy.

Historically, ObGyns were taught that the benefits of removing normal ovaries (to prevent ovarian cancer) in average-risk women at the time of hysterectomy outweighed the risks. We agree with the authors’ speculation that beginning with Parker’s 2005 publication,23 ObGyns have become more conservative in performing unindicated BSO in women at average risk for ovarian cancer, now recognizing that the harms of this procedure often outweigh any benefits.28

Women with BRCA1 and BRCA2 gene mutations are at elevated risk for ovarian, tubal, and breast malignancies. In this population, risk-reducing BSO dramatically lowers future risk of ovarian and tubal cancer.

Data addressing the effect of RRSO in BRCA1 and BRCA2 gene mutation carriers continue to be evaluated, with differences between the 2 mutations, but they suggest that the surgery reduces not only ovarian cancer and tubal cancer but also possibly breast cancer.29

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE
Many of our patients are fearful regarding the possibility that they could be diagnosed with breast or ovarian cancer, and in their minds, fears regarding these 2 potentially deadly diseases outweigh concerns about more common causes of death in women, including cardiovascular disease. Accordingly, counseling women at average risk for ovarian cancer who are planning hysterectomy for benign indications can be challenging. In recent years, ObGyns have increasingly been performing opportunistic bilateral salpingectomy (OS) in women at average risk of ovarian cancer at the time of hysterectomy for benign disease. It is important to note that the studies we refer to in this Update addressed BSO, not OS. We hope that the findings we have reviewed here assist clinicians in helping women to understand the risks and benefits associated with premenopausal BSO and the need to discuss the pros and cons of HT for these women before surgery.

 

Continue to: Trends show decline in ET use in surgically menopausal women... 

 

 

 

Trends show decline in ET use in surgically menopausal women 

Suzuki Y, Huang Y, Melamed A, et al. Use of estrogen therapy after surgical menopause in women who are premenopausal. Obstet Gynecol. 2022;139:756-763. doi: 10.1097/AOG.0000000000004762.

In addition to highlighting the risks associated with premenopausal BSO in women at average risk for ovarian cancer, the reports referred to above also underscore that the use of replacement menopausal HT in premenopausal women who undergo BSO prevents morbidity and mortality that otherwise accompanies surgical menopause. In addition, the North American Menopause Society (NAMS) recommends replacement menopausal HT in the setting of induced early menopause when no contraindications are present.18

To assess the prevalence of HT use in surgically menopausal women, investigators at Columbia University College of Physicians and Surgeons used a national database that captures health insurance claims for some 280 million US patients, focusing on women aged 18 to 50 years who underwent BSO from 2008 to 2019.30 The great majority of women in this database have private insurance. Although the authors used the term estrogen therapy in their article, this term refers to systemic estrogen alone or with progestogen, as well as vaginal ET (personal communication with Jason Wright, MD, a coauthor of the study, May 19, 2022). In this Update section, we use the term HT to include use of any systemic HT or vaginal estrogen.

 

Prevalence of HT use changed over time period and patient age range

Among almost 61,980 evaluable women who had undergone BSO (median age, 45 years; 75.1% with concomitant hysterectomy; median follow-up time, 27 months), with no history of gynecologic or breast cancer, HT was used within 3 years of BSO by 64.5%. The highest percentage of women in this cohort who used HT peaked in 2008 (69.5%), declining to 58.2% by 2016. The median duration of HT use was 5.3 months. The prevalence of HT use 3 years after BSO declined with age, from 79.1% in women aged 18–29 to 60.0% in women aged 45–50.30

This report, published in the June 2022 issue of Obstetrics and Gynecology, makes several sobering observations: Many surgically menopausal women aged 50 years and younger are not prescribed HT, the proportion of such women receiving a prescription for HT is declining over time, and the duration of HT use following BSO is short. ●

 

WHAT THIS EVIDENCE MEANS FOR PRACTICE
As ObGyn physicians, we can play an important role by educating healthy women with induced menopause who are younger than the average age of spontaneous menopause, and who have no contraindications, that the benefits of HT far outweigh risks. Many of these women will benefit from longer-term HT, using doses substantially higher than are used in women who undergo spontaneous menopause.31,32 After reaching the age of menopause, healthy women without contraindications may continue to benefit from HT into their 50s or beyond if they have vasomotor symptoms, bone loss, or other indications for treatment.18,19

 

References
  1. Chlebowski RT, Hendrix SL, Langer RD, et al; WHI Investigators. Influence of estrogen plus progestin on breast cancer and mammography in healthy postmenopausal women: the Women’s Health Initiative randomized trial. JAMA. 2003;289:3243-3253. doi: 10.1001/jama.289.24.3243.
  2. Anderson GL, Limacher M, Assaf AR, et al; Women’s Health Initiative Steering Committee. Effects of conjugated equine estrogen in postmenopausal women with hysterectomy: the Women’s Health Initiative randomized controlled trial. JAMA. 2004;291:1701-1712. doi: 10.1001/jama.291.14.1701.
  3. Opatrny L, Dell’Aniello S, Assouline S, et al. Hormone replacement therapy use and variations in the risk of breast cancer. BJOG. 2008;115:169-175. doi: 10.1111/j.14710528.2007.01520.x.
  4. Fournier A, Berrino F, Riboli E, et al. Breast cancer risk in relation to different types of hormone replacement therapy in the E3N-EPIC cohort. Int J Cancer. 2005;114:448-454. doi: 10.1002/ijc.20710.
  5. Fournier A, Berrino F, Clavel-Chapelon F. Unequal risks for breast cancer associated with different hormone replacement therapies: results from the E3N cohort study. Breast Cancer Res Treat. 2008;107:103-111. doi: 10.1007/s10549-007-9523-x.
  6. Beral V; Million Women Study Collaborators. Breast cancer and hormone-replacement therapy in the million women study. Lancet. 2003;362:419–27. doi: 10.1016/s01406736(03)14065-2.
  7. Yang Z, Hu Y, Zhang J, et al. Estradiol therapy and breast cancer risk in perimenopausal and postmenopausal women: a systematic review and meta-analysis. Gynecol Endocrinol. 2017;33:87-92. doi: 10.1080/09513590.2016.1248932.
  8. Asi N, Mohammed K, Haydour Q, et al. Progesterone vs synthetic progestins and the risk of breast cancer: a systematic review and meta-analysis. Syst Rev. 2016;5:121. doi: 10.1186/ s13643-016-0294-5.
  9. Abenhaim HA, Suissa S, Azoulay L, et al. Menopausal hormone therapy formulation and breast cancer risk. Obstet Gynecol. 2022;139:1103-1110. doi: 10.1097/AOG.0000000000004723.
  10. Chlebowski RT, Rohan TE, Manson JE, et al. Breast cancer after use of estrogen plus progestin and estrogen alone: analyses of data from 2 Women’s Health Initiative randomized clinical trials. JAMA Oncol. 2015;1:296-305. doi: 10.1001/ jamaoncol.2015.0494.
  11. Chlebowski RT, Anderson GL, Aragaki A, et al. Association of menopausal hormone therapy with breast cancer incidence and mortality during long-term follow-up of the Women’s Health Initiative randomized clinical trials. JAMA. 2020;324:369-380. doi: 10.1001/jama.2020.9482.
  12. Cordina-Duverger E, Truong T, Anger A, et al. Risk of breast cancer by type of menopausal hormone therapy: a case-control study among postmenopausal women in France. PLoS One. 2013;8:e78016. doi: 10.1371/journal.pone.0078016.
  13. Simin J, Tamimi R, Lagergren J, et al. Menopausal hormone therapy and cancer risk: an overestimated risk? Eur J Cancer. 2017;84:60–8. doi: 10.1016/j.ejca. 2017.07.012.
  14. Stanczyk FZ, Hapgood JP, Winer S, et al. Progestogens used in postmenopausal hormone therapy: differences in their pharmacological properties, intracellular actions, and clinical effects. Endocr Rev. 2013;34:171-208. doi: 10.1210/er.20121008.
  15. Stute P, Wildt L, Neulen J. The impact of micronized progesterone on breast cancer risk: a systematic review. Climacteric. 2018;21:111-122. doi: 10.1080/13697137.2017.1421925.
  16. Anderson GL, Chlebowski RT, Aragaki A, et al. Conjugated equine oestrogen and breast cancer incidence and mortality in postmenopausal women with hysterectomy: extended follow-up of the Women’s Health Initiative randomised placebo-controlled trial. Lancet Oncol. 2012;13:476-486. doi: 10.1016/S1470-2045(12)70075-X.
  17. Chlebowski RT, Barrington W, Aragaki AK, et al. Estrogen alone and health outcomes in black women by African ancestry: a secondary analyses of a randomized controlled trial. Menopause. 2017;24:133-141. doi: 10.1097/ GME.0000000000000733.
  18. The NAMS 2017 Hormone Therapy Position Statement Advisory Panel. The 2017 hormone therapy position statement of The North American Menopause Society. Menopause. 2017;24:728-753. doi: 10.1097/GME.0000000000000921.
  19. Pinkerton JV. Hormone therapy for postmenopausal women. N Engl J Med. 2020;382(5):446-455. doi: 10.1056/ NEJMcp1714787.
  20. Marchetti C, De Felice F, Boccia S, et al. Hormone replacement therapy after prophylactic risk-reducing salpingooophorectomy and breast cancer risk in BRCA1 and BRCA2 mutation carriers: a meta-analysis. Crit Rev Oncol Hematol. 2018;132:111-115. doi: 10.1016/j.critrevonc.2018.09.018.
  21.  Vinogradova Y, Coupland C, Hippisley-Cox J. Use of hormone replacement therapy and risk of venous thromboembolism: nested case-control studies using the QResearch and CPRD databases. BMJ. 2019;364:k4810. doi: 10.1136/bmj.k4810.
  22. Pinkerton JV. Hormone therapy: key points from NAMS 2017 Position Statement. Clin Obstet Gynecol. 2018;61:447453. doi: 10.1097/GRF.0000000000000383.
  23. Parker WH, Broder MS, Liu Z, et al. Ovarian conservation at the time of hysterectomy for benign disease. Obstet Gynecol. 2005;106:219-226. doi: 10.1097/01. AOG.0000167394.38215.56.
  24. Parker WH, Broder MS, Chang E, et al. Ovarian conservation at the time of hysterectomy and long-term health outcomes in the Nurses’ Health Study. Obstet Gynecol. 2009;113:10271037. doi: 10.1097/AOG.0b013e3181a11c64.
  25. Rocca WA, Bower JH, Maraganore DM, et al. Increased risk of cognitive impairment or dementia in women who underwent oophorectomy before menopause. Neurology. 2007;69:10741083. doi: 10.1212/01.wnl.0000276984.19542.e6.
  26. Rocca WA, Gazzuola Rocca L, Smith CY, et al Loss of ovarian hormones and accelerated somatic and mental aging. Physiology (Bethesda). 2018;33:374-383. doi: 10.1152/ physiol.00024.2018.
  27. Mytton J, Evison F, Chilton PJ, et al. Removal of all ovarian tissue versus conserving ovarian tissue at time of hysterectomy in premenopausal patients with benign disease: study using routine data and data linkage. BMJ. 2017;356:j372. doi: 10.1136/bmj.j372.
  28. Erickson Z, Rocca WA, Smith CY, et al. Time trends in unilateral and bilateral oophorectomy in a geographically defined American population. Obstet Gynecol. 2022;139:724-734. doi: 10.1097/AOG.0000000000004728.
  29. Choi YH, Terry MB, Daly MB, et al. Association of risk-reducing salpingo-oophorectomy with breast cancer risk in women with BRCA1 and BRCA2 pathogenic variants. JAMA Oncol. 2021;7:585-592. doi: 10.1001/jamaoncol.2020 .7995.
  30. Suzuki Y, Huang Y, Melamed A, et al. Use of estrogen therapy after surgical menopause in women who are premenopausal. Obstet Gynecol. 2022;139:756-763. doi: 10.1097/ AOG.0000000000004762.
  31. Faubion S, Kaunitz AM, Kapoor E. HT for women who have had BSO before the age of natural menopause: discerning the nuances. OBG Manag. 2022;34(2):20-27, 45. doi: 10.12788/ obgm.0174.
  32. Kaunitz AM, Kapoor E, Faubion S. Treatment of women after bilateral salpingo-oophorectomy performed prior to natural menopause. JAMA. 2021;326:1429-1430. doi: 10.1001/ jama.2021.3305.
References
  1. Chlebowski RT, Hendrix SL, Langer RD, et al; WHI Investigators. Influence of estrogen plus progestin on breast cancer and mammography in healthy postmenopausal women: the Women’s Health Initiative randomized trial. JAMA. 2003;289:3243-3253. doi: 10.1001/jama.289.24.3243.
  2. Anderson GL, Limacher M, Assaf AR, et al; Women’s Health Initiative Steering Committee. Effects of conjugated equine estrogen in postmenopausal women with hysterectomy: the Women’s Health Initiative randomized controlled trial. JAMA. 2004;291:1701-1712. doi: 10.1001/jama.291.14.1701.
  3. Opatrny L, Dell’Aniello S, Assouline S, et al. Hormone replacement therapy use and variations in the risk of breast cancer. BJOG. 2008;115:169-175. doi: 10.1111/j.14710528.2007.01520.x.
  4. Fournier A, Berrino F, Riboli E, et al. Breast cancer risk in relation to different types of hormone replacement therapy in the E3N-EPIC cohort. Int J Cancer. 2005;114:448-454. doi: 10.1002/ijc.20710.
  5. Fournier A, Berrino F, Clavel-Chapelon F. Unequal risks for breast cancer associated with different hormone replacement therapies: results from the E3N cohort study. Breast Cancer Res Treat. 2008;107:103-111. doi: 10.1007/s10549-007-9523-x.
  6. Beral V; Million Women Study Collaborators. Breast cancer and hormone-replacement therapy in the million women study. Lancet. 2003;362:419–27. doi: 10.1016/s01406736(03)14065-2.
  7. Yang Z, Hu Y, Zhang J, et al. Estradiol therapy and breast cancer risk in perimenopausal and postmenopausal women: a systematic review and meta-analysis. Gynecol Endocrinol. 2017;33:87-92. doi: 10.1080/09513590.2016.1248932.
  8. Asi N, Mohammed K, Haydour Q, et al. Progesterone vs synthetic progestins and the risk of breast cancer: a systematic review and meta-analysis. Syst Rev. 2016;5:121. doi: 10.1186/ s13643-016-0294-5.
  9. Abenhaim HA, Suissa S, Azoulay L, et al. Menopausal hormone therapy formulation and breast cancer risk. Obstet Gynecol. 2022;139:1103-1110. doi: 10.1097/AOG.0000000000004723.
  10. Chlebowski RT, Rohan TE, Manson JE, et al. Breast cancer after use of estrogen plus progestin and estrogen alone: analyses of data from 2 Women’s Health Initiative randomized clinical trials. JAMA Oncol. 2015;1:296-305. doi: 10.1001/ jamaoncol.2015.0494.
  11. Chlebowski RT, Anderson GL, Aragaki A, et al. Association of menopausal hormone therapy with breast cancer incidence and mortality during long-term follow-up of the Women’s Health Initiative randomized clinical trials. JAMA. 2020;324:369-380. doi: 10.1001/jama.2020.9482.
  12. Cordina-Duverger E, Truong T, Anger A, et al. Risk of breast cancer by type of menopausal hormone therapy: a case-control study among postmenopausal women in France. PLoS One. 2013;8:e78016. doi: 10.1371/journal.pone.0078016.
  13. Simin J, Tamimi R, Lagergren J, et al. Menopausal hormone therapy and cancer risk: an overestimated risk? Eur J Cancer. 2017;84:60–8. doi: 10.1016/j.ejca. 2017.07.012.
  14. Stanczyk FZ, Hapgood JP, Winer S, et al. Progestogens used in postmenopausal hormone therapy: differences in their pharmacological properties, intracellular actions, and clinical effects. Endocr Rev. 2013;34:171-208. doi: 10.1210/er.20121008.
  15. Stute P, Wildt L, Neulen J. The impact of micronized progesterone on breast cancer risk: a systematic review. Climacteric. 2018;21:111-122. doi: 10.1080/13697137.2017.1421925.
  16. Anderson GL, Chlebowski RT, Aragaki A, et al. Conjugated equine oestrogen and breast cancer incidence and mortality in postmenopausal women with hysterectomy: extended follow-up of the Women’s Health Initiative randomised placebo-controlled trial. Lancet Oncol. 2012;13:476-486. doi: 10.1016/S1470-2045(12)70075-X.
  17. Chlebowski RT, Barrington W, Aragaki AK, et al. Estrogen alone and health outcomes in black women by African ancestry: a secondary analyses of a randomized controlled trial. Menopause. 2017;24:133-141. doi: 10.1097/ GME.0000000000000733.
  18. The NAMS 2017 Hormone Therapy Position Statement Advisory Panel. The 2017 hormone therapy position statement of The North American Menopause Society. Menopause. 2017;24:728-753. doi: 10.1097/GME.0000000000000921.
  19. Pinkerton JV. Hormone therapy for postmenopausal women. N Engl J Med. 2020;382(5):446-455. doi: 10.1056/ NEJMcp1714787.
  20. Marchetti C, De Felice F, Boccia S, et al. Hormone replacement therapy after prophylactic risk-reducing salpingooophorectomy and breast cancer risk in BRCA1 and BRCA2 mutation carriers: a meta-analysis. Crit Rev Oncol Hematol. 2018;132:111-115. doi: 10.1016/j.critrevonc.2018.09.018.
  21.  Vinogradova Y, Coupland C, Hippisley-Cox J. Use of hormone replacement therapy and risk of venous thromboembolism: nested case-control studies using the QResearch and CPRD databases. BMJ. 2019;364:k4810. doi: 10.1136/bmj.k4810.
  22. Pinkerton JV. Hormone therapy: key points from NAMS 2017 Position Statement. Clin Obstet Gynecol. 2018;61:447453. doi: 10.1097/GRF.0000000000000383.
  23. Parker WH, Broder MS, Liu Z, et al. Ovarian conservation at the time of hysterectomy for benign disease. Obstet Gynecol. 2005;106:219-226. doi: 10.1097/01. AOG.0000167394.38215.56.
  24. Parker WH, Broder MS, Chang E, et al. Ovarian conservation at the time of hysterectomy and long-term health outcomes in the Nurses’ Health Study. Obstet Gynecol. 2009;113:10271037. doi: 10.1097/AOG.0b013e3181a11c64.
  25. Rocca WA, Bower JH, Maraganore DM, et al. Increased risk of cognitive impairment or dementia in women who underwent oophorectomy before menopause. Neurology. 2007;69:10741083. doi: 10.1212/01.wnl.0000276984.19542.e6.
  26. Rocca WA, Gazzuola Rocca L, Smith CY, et al Loss of ovarian hormones and accelerated somatic and mental aging. Physiology (Bethesda). 2018;33:374-383. doi: 10.1152/ physiol.00024.2018.
  27. Mytton J, Evison F, Chilton PJ, et al. Removal of all ovarian tissue versus conserving ovarian tissue at time of hysterectomy in premenopausal patients with benign disease: study using routine data and data linkage. BMJ. 2017;356:j372. doi: 10.1136/bmj.j372.
  28. Erickson Z, Rocca WA, Smith CY, et al. Time trends in unilateral and bilateral oophorectomy in a geographically defined American population. Obstet Gynecol. 2022;139:724-734. doi: 10.1097/AOG.0000000000004728.
  29. Choi YH, Terry MB, Daly MB, et al. Association of risk-reducing salpingo-oophorectomy with breast cancer risk in women with BRCA1 and BRCA2 pathogenic variants. JAMA Oncol. 2021;7:585-592. doi: 10.1001/jamaoncol.2020 .7995.
  30. Suzuki Y, Huang Y, Melamed A, et al. Use of estrogen therapy after surgical menopause in women who are premenopausal. Obstet Gynecol. 2022;139:756-763. doi: 10.1097/ AOG.0000000000004762.
  31. Faubion S, Kaunitz AM, Kapoor E. HT for women who have had BSO before the age of natural menopause: discerning the nuances. OBG Manag. 2022;34(2):20-27, 45. doi: 10.12788/ obgm.0174.
  32. Kaunitz AM, Kapoor E, Faubion S. Treatment of women after bilateral salpingo-oophorectomy performed prior to natural menopause. JAMA. 2021;326:1429-1430. doi: 10.1001/ jama.2021.3305.
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Should treatment be initiated for mild chronic hypertension in pregnancy to improve outcomes?

Article Type
Changed
Tue, 09/06/2022 - 12:51

 

 

Tita AT, Szychowski JM, Boggess K, et al. Treatment for mild chronic hypertension during pregnancy. N Engl J Med. 2022;386:1781-1792. doi: 10.1056/NEJMoa2201295.

Expert Commentary

In the nonpregnant population, medical management of hypertension >140/90 mm Hg is standard practice. By contrast, much higher blood pressures (BPs; up to 160/110 mm Hg) traditionally have been tolerated in pregnant patients with chronic hypertension without initiating treatment, and existing medications are often discontinued during pregnancy. Concern for impaired fetal growth as well as lack of data on improved outcomes have led to different recommendations for the management of mild chronic hypertension in pregnancy. However, chronic hypertension affects a substantial number of pregnant patients and is known to be a risk factor for severe short-term pregnancy and long-term health complications. With preliminary data suggesting that BPs >140/90 mm Hg prior to 20 weeks’ gestation are associated with an increase in adverse outcomes, Tita and colleagues sought to determine the effects of decreasing BP in pregnant patients with mild chronic hypertension.

Details about the study

This is an investigator-initiated, multicenter, pragmatic, open-label, randomized control trial of 2,408 patients with mild chronic hypertension. The active treatment group was treated with antihypertensive medication (including titration of existing medication), targeting a BP of <140/90 mm Hg. The control group only received medication for severe hypertension (≥160 mm Hg systolic or ≥105 mm Hg diastolic). The primary outcome of the study was a composite of preeclampsia with severe features, medically indicated preterm delivery prior to 35 weeks’ gestation (not spontaneous labor or rupture of membranes), placental abruption, and fetal or neonatal death. Birthweight that was less than the 10th percentile was used as a safety outcome. The hypothesis was that treatment would decrease the rate of adverse pregnancy and fetal/neonatal outcomes.

 

The patient population of singleton pregnancies at a gestational age of less than 23 weeks included 56% with known chronic hypertension on medications, 22% with known chronic hypertension without medications, and 22% with newly diagnosed (during pregnancy) chronic hypertension. The treatment group primarily received labetalol (61.7%) or nifedipine (35.6%); the maximum dose of a single agent was used as tolerated prior to adding a second agent. The control group only received an antihypertensive medication for severe hypertension.

Treatment of chronic hypertension demonstrated a decreased risk of the composite adverse outcome with an adjusted risk ratio of 0.82 (95% confidence interval [CI], 0.74 to 0.92; P<.001) and a number needed to treat (NNT) of 14.7. When analyzed separately, a similar risk reduction was noted for both preeclampsia with severe features and medically indicated preterm birth <35 weeks’ gestation. There was no statistical difference between the groups for birth weight <10th percentile and <5th percentile (adjusted risk ratio, 1.04 [0.82–1.31] vs 0.89 [0.62–1.26], respectively).

Planned subgroup analysis by type of chronic hypertension, race/ethnic group, diabetes status, gestational age at baseline, and body mass index (BMI) demonstrated a similar treatment effect to the overall composite primary outcome, with the exception of patients with newly diagnosed chronic hypertension or BMI ≥40 kg/m2. Overall maternal and neonatal composite outcomes of severe complications did not differ between treatment and control groups; however, rates of severe preeclampsia, any preeclampsia, preterm birth rate, and birthweight <2,500 g were all lower in the treatment group.

Study strengths and weaknesses

The study strengths cited are a large sample size, multiple study sites, an independent data and safety monitoring board with close oversight, and centralized blinded confirmation of outcomes. Another strength is that the patient population of the study was similar to the overall population of pregnant patients in the United States with chronic hypertension in terms of age, race, and ethnicity.

The weaknesses of the study include the open-label design and the high ratio of screened to enrolled patients. Both of these issues appear related to the study design (ethics and logistics of a blinded treatment and gestational age cutoff) and the physiology of pregnancy (expected decrease in BP in the second trimester rendering patients ineligible due to lower BP). The study was also not powered to assess treatment effect in all of the subgroups, and further evaluation of patients with newly diagnosed chronic hypertension and BMI ≥ 40 kg/m2 is needed. ●

WHAT THIS EVIDENCE MEANS FOR PRACTICE
Pregnant patients with chronic hypertension should continue or initiate antihypertensive medication to target a BP goal of <140/90 mm Hg. This substantial practice change is supported by the significant decrease demonstrated in this study in adverse outcomes such as preeclampsia with severe features and medically indicated preterm birth <35 weeks’ gestation without an increase in small-for-gestational-age newborns.

 

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Jaimey M. Pauli, MD, Professor, Department of Obstetrics and Gynecology; Chief, Division of Maternal-Fetal Medicine, Pennsylvania State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania.

 

The author reports no financial relationships relevant to this article. 

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The author reports no financial relationships relevant to this article. 

Author and Disclosure Information

Jaimey M. Pauli, MD, Professor, Department of Obstetrics and Gynecology; Chief, Division of Maternal-Fetal Medicine, Pennsylvania State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania.

 

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Tita AT, Szychowski JM, Boggess K, et al. Treatment for mild chronic hypertension during pregnancy. N Engl J Med. 2022;386:1781-1792. doi: 10.1056/NEJMoa2201295.

Expert Commentary

In the nonpregnant population, medical management of hypertension >140/90 mm Hg is standard practice. By contrast, much higher blood pressures (BPs; up to 160/110 mm Hg) traditionally have been tolerated in pregnant patients with chronic hypertension without initiating treatment, and existing medications are often discontinued during pregnancy. Concern for impaired fetal growth as well as lack of data on improved outcomes have led to different recommendations for the management of mild chronic hypertension in pregnancy. However, chronic hypertension affects a substantial number of pregnant patients and is known to be a risk factor for severe short-term pregnancy and long-term health complications. With preliminary data suggesting that BPs >140/90 mm Hg prior to 20 weeks’ gestation are associated with an increase in adverse outcomes, Tita and colleagues sought to determine the effects of decreasing BP in pregnant patients with mild chronic hypertension.

Details about the study

This is an investigator-initiated, multicenter, pragmatic, open-label, randomized control trial of 2,408 patients with mild chronic hypertension. The active treatment group was treated with antihypertensive medication (including titration of existing medication), targeting a BP of <140/90 mm Hg. The control group only received medication for severe hypertension (≥160 mm Hg systolic or ≥105 mm Hg diastolic). The primary outcome of the study was a composite of preeclampsia with severe features, medically indicated preterm delivery prior to 35 weeks’ gestation (not spontaneous labor or rupture of membranes), placental abruption, and fetal or neonatal death. Birthweight that was less than the 10th percentile was used as a safety outcome. The hypothesis was that treatment would decrease the rate of adverse pregnancy and fetal/neonatal outcomes.

 

The patient population of singleton pregnancies at a gestational age of less than 23 weeks included 56% with known chronic hypertension on medications, 22% with known chronic hypertension without medications, and 22% with newly diagnosed (during pregnancy) chronic hypertension. The treatment group primarily received labetalol (61.7%) or nifedipine (35.6%); the maximum dose of a single agent was used as tolerated prior to adding a second agent. The control group only received an antihypertensive medication for severe hypertension.

Treatment of chronic hypertension demonstrated a decreased risk of the composite adverse outcome with an adjusted risk ratio of 0.82 (95% confidence interval [CI], 0.74 to 0.92; P<.001) and a number needed to treat (NNT) of 14.7. When analyzed separately, a similar risk reduction was noted for both preeclampsia with severe features and medically indicated preterm birth <35 weeks’ gestation. There was no statistical difference between the groups for birth weight <10th percentile and <5th percentile (adjusted risk ratio, 1.04 [0.82–1.31] vs 0.89 [0.62–1.26], respectively).

Planned subgroup analysis by type of chronic hypertension, race/ethnic group, diabetes status, gestational age at baseline, and body mass index (BMI) demonstrated a similar treatment effect to the overall composite primary outcome, with the exception of patients with newly diagnosed chronic hypertension or BMI ≥40 kg/m2. Overall maternal and neonatal composite outcomes of severe complications did not differ between treatment and control groups; however, rates of severe preeclampsia, any preeclampsia, preterm birth rate, and birthweight <2,500 g were all lower in the treatment group.

Study strengths and weaknesses

The study strengths cited are a large sample size, multiple study sites, an independent data and safety monitoring board with close oversight, and centralized blinded confirmation of outcomes. Another strength is that the patient population of the study was similar to the overall population of pregnant patients in the United States with chronic hypertension in terms of age, race, and ethnicity.

The weaknesses of the study include the open-label design and the high ratio of screened to enrolled patients. Both of these issues appear related to the study design (ethics and logistics of a blinded treatment and gestational age cutoff) and the physiology of pregnancy (expected decrease in BP in the second trimester rendering patients ineligible due to lower BP). The study was also not powered to assess treatment effect in all of the subgroups, and further evaluation of patients with newly diagnosed chronic hypertension and BMI ≥ 40 kg/m2 is needed. ●

WHAT THIS EVIDENCE MEANS FOR PRACTICE
Pregnant patients with chronic hypertension should continue or initiate antihypertensive medication to target a BP goal of <140/90 mm Hg. This substantial practice change is supported by the significant decrease demonstrated in this study in adverse outcomes such as preeclampsia with severe features and medically indicated preterm birth <35 weeks’ gestation without an increase in small-for-gestational-age newborns.

 

 

 

Tita AT, Szychowski JM, Boggess K, et al. Treatment for mild chronic hypertension during pregnancy. N Engl J Med. 2022;386:1781-1792. doi: 10.1056/NEJMoa2201295.

Expert Commentary

In the nonpregnant population, medical management of hypertension >140/90 mm Hg is standard practice. By contrast, much higher blood pressures (BPs; up to 160/110 mm Hg) traditionally have been tolerated in pregnant patients with chronic hypertension without initiating treatment, and existing medications are often discontinued during pregnancy. Concern for impaired fetal growth as well as lack of data on improved outcomes have led to different recommendations for the management of mild chronic hypertension in pregnancy. However, chronic hypertension affects a substantial number of pregnant patients and is known to be a risk factor for severe short-term pregnancy and long-term health complications. With preliminary data suggesting that BPs >140/90 mm Hg prior to 20 weeks’ gestation are associated with an increase in adverse outcomes, Tita and colleagues sought to determine the effects of decreasing BP in pregnant patients with mild chronic hypertension.

Details about the study

This is an investigator-initiated, multicenter, pragmatic, open-label, randomized control trial of 2,408 patients with mild chronic hypertension. The active treatment group was treated with antihypertensive medication (including titration of existing medication), targeting a BP of <140/90 mm Hg. The control group only received medication for severe hypertension (≥160 mm Hg systolic or ≥105 mm Hg diastolic). The primary outcome of the study was a composite of preeclampsia with severe features, medically indicated preterm delivery prior to 35 weeks’ gestation (not spontaneous labor or rupture of membranes), placental abruption, and fetal or neonatal death. Birthweight that was less than the 10th percentile was used as a safety outcome. The hypothesis was that treatment would decrease the rate of adverse pregnancy and fetal/neonatal outcomes.

 

The patient population of singleton pregnancies at a gestational age of less than 23 weeks included 56% with known chronic hypertension on medications, 22% with known chronic hypertension without medications, and 22% with newly diagnosed (during pregnancy) chronic hypertension. The treatment group primarily received labetalol (61.7%) or nifedipine (35.6%); the maximum dose of a single agent was used as tolerated prior to adding a second agent. The control group only received an antihypertensive medication for severe hypertension.

Treatment of chronic hypertension demonstrated a decreased risk of the composite adverse outcome with an adjusted risk ratio of 0.82 (95% confidence interval [CI], 0.74 to 0.92; P<.001) and a number needed to treat (NNT) of 14.7. When analyzed separately, a similar risk reduction was noted for both preeclampsia with severe features and medically indicated preterm birth <35 weeks’ gestation. There was no statistical difference between the groups for birth weight <10th percentile and <5th percentile (adjusted risk ratio, 1.04 [0.82–1.31] vs 0.89 [0.62–1.26], respectively).

Planned subgroup analysis by type of chronic hypertension, race/ethnic group, diabetes status, gestational age at baseline, and body mass index (BMI) demonstrated a similar treatment effect to the overall composite primary outcome, with the exception of patients with newly diagnosed chronic hypertension or BMI ≥40 kg/m2. Overall maternal and neonatal composite outcomes of severe complications did not differ between treatment and control groups; however, rates of severe preeclampsia, any preeclampsia, preterm birth rate, and birthweight <2,500 g were all lower in the treatment group.

Study strengths and weaknesses

The study strengths cited are a large sample size, multiple study sites, an independent data and safety monitoring board with close oversight, and centralized blinded confirmation of outcomes. Another strength is that the patient population of the study was similar to the overall population of pregnant patients in the United States with chronic hypertension in terms of age, race, and ethnicity.

The weaknesses of the study include the open-label design and the high ratio of screened to enrolled patients. Both of these issues appear related to the study design (ethics and logistics of a blinded treatment and gestational age cutoff) and the physiology of pregnancy (expected decrease in BP in the second trimester rendering patients ineligible due to lower BP). The study was also not powered to assess treatment effect in all of the subgroups, and further evaluation of patients with newly diagnosed chronic hypertension and BMI ≥ 40 kg/m2 is needed. ●

WHAT THIS EVIDENCE MEANS FOR PRACTICE
Pregnant patients with chronic hypertension should continue or initiate antihypertensive medication to target a BP goal of <140/90 mm Hg. This substantial practice change is supported by the significant decrease demonstrated in this study in adverse outcomes such as preeclampsia with severe features and medically indicated preterm birth <35 weeks’ gestation without an increase in small-for-gestational-age newborns.

 

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Best practices for evaluating pelvic pain in patients with Essure tubal occlusion devices

Article Type
Changed
Tue, 09/06/2022 - 12:49

 

 

The evaluation and management of chronic pelvic pain in patients with a history of Essure device (Bayer HealthCare Pharmaceuticals Inc, Whippany, New Jersey) insertion have posed many challenges for both clinicians and patients. The availability of high-quality, evidence-based clinical guidance has been limited. We have reviewed the currently available published data, and here provide an overview of takeaways, as well as share our perspective and approach on evaluating and managing chronic pelvic pain in this unique patient population.

The device

The Essure microinsert is a hysteroscopically placed device that facilitates permanent sterilization by occluding the bilateral proximal fallopian tubes. The microinsert has an inner and outer nitinol coil that attaches the device to the proximal fallopian tube to ensure retention. The inner coil releases polyethylene terephthalate fibers that cause tubal fiber proliferation to occlude the lumen of the fallopian tube and achieve sterilization.

The device was first approved by the US Food and Drug Administration (FDA) in 2002. In subsequent years, the device was well received and widely used, with approximately 750,000 women worldwide undergoing Essure placement.1,2 Shortly after approval, many adverse events (AEs), including pelvic pain and abnormal uterine bleeding, were reported, resulting in a public meeting of the FDA Obstetrics and Gynecology Devices Panel in September 2015. A postmarket surveillance study on the device ensued to assess complication rates including unplanned pregnancy, pelvic pain, and surgery for removal. In February 2016, the FDA issued a black box warning and a patient decision checklist.3,4 In December 2018, Bayer stopped selling and distributing Essure in the United States.5 A 4-year follow-up surveillance study on Essure was submitted to the FDA in March 2020.

Adverse outcomes

Common AEs related to the Essure device include heavy uterine bleeding, pelvic pain, and other quality-of-life symptoms such as fatigue and weight gain.6-8 The main safety endpoints for the mandated FDA postmarket 522 surveillance studies were chronic lower abdominal and pelvic pain; abnormal uterine bleeding; hypersensitivity; allergic reaction, as well as autoimmune disorders incorporating inflammatory markers and human leukocyte antigen; and gynecologic surgery for device removal.9 Postmarket surveillence has shown that most AEs are related to placement complications or pelvic pain after Essure insertion. However, there have been several reports of autoimmune diseases categorized as serious AEs, such as new-onset systemic lupus erythematosus, rheumatoid arthritis, and worsening ulcerative colitis, after Essure insertion.5

 

Evaluation of symptoms

Prevalence of pelvic pain following device placement

We conducted a PubMed and MEDLINE search from January 2000 to May 2020, which identified 43 studies citing AEs related to device placement, including pelvic or abdominal pain, abnormal uterine bleeding, hypersensitivity, and autoimmune disorders. A particularly debilitating and frequently cited AE was new-onset pelvic pain or worsening of preexisting pelvic pain. Perforation of the uterus or fallopian tube, resulting in displacement of the device into the peritoneal cavity, or fragmentation of the microinsert was reported as a serious AE that occurred after device placement. However, due to the complexity of chronic pelvic pain pathogenesis, the effect of the insert on patients with existing chronic pelvic pain remains unknown.

Authors of a large retrospective study found that approximately 2.7% of 1,430 patients developed new-onset or worsening pelvic pain after device placement. New-onset pelvic pain in 1% of patients was thought to be secondary to device placement, without a coexisting pathology or diagnosis.10

In a retrospective study by Clark and colleagues, 22 of 50 women (44%) with pelvic pain after microinsert placement were found to have at least one other cause of pelvic pain. The most common alternative diagnoses were endometriosis, adenomyosis, salpingitis, and adhesive disease. Nine of the 50 patients (18%) were found to have endometriosis upon surgical removal of the microinsert.7

Another case series examined outcomes in 29 patients undergoing laparoscopic device removal due to new-onset pelvic pain. Intraoperative findings included endometriosis in 5 patients (17.2%) and pelvic adhesions in 3 (10.3%).2 Chronic pelvic pain secondary to endometriosis may be exacerbated with Essure insertion due to discontinuation of hormonal birth control after device placement,7 and this diagnosis along with adenomyosis should be strongly considered in patients whose pelvic pain began when hormonal contraception was discontinued after placement of the device.

Continue to: Risk factors...

 

 

Risk factors

Authors of a retrospective cohort study found that patients with prior diagnosis of a chronic pain syndrome, low back pain, headaches, or fibromyalgia were 5 to 6 times more likely to report acute and chronic pain after hysteroscopic sterilization with Essure.11 Since chronic pain is often thought to be driven by a hyperalgesic state of the central nervous system, as previously shown in patients with conditions such as vulvodynia, interstitial cystitis, and fibromyalgia,12 a hyperalgesic state can potentially explain why some patients are more susceptible to developing worsening pain.

Van Limburg and colleagues conducted a retrospective cohort study with prospective follow-up on 284 women who underwent Essure sterilization. Among these patients, 48% reported negative AEs; risk factors included young age at placement, increasing gravidity, and no prior abdominal surgery.13

Onset of pain

The timing and onset of pelvic pain vary widely, suggesting there is no particular time frame for this AE after device placement.2,6,14-18 A case series by Arjona and colleagues analyzed the incidence of chronic pelvic pain in 4,274 patients after Essure sterilization. Seven patients (0.16%) reported chronic pelvic pain that necessitated device removal. In 6 of the women, the pelvic pain began within 1 week of device placement. In 3 of the 6 cases, the surgeon reported the removal procedures as “difficult.” In all 6 cases, the level of pelvic pain increased with time and was not alleviated with standard analgesic medications.6

In another case series of 26 patients, the authors evaluated patients undergoing laparoscopic removal of Essure secondary to pelvic pain and reported that the time range for symptom presentation was immediate to 85 months. Thirteen of 26 patients (50%) reported pain onset within less than 1 month of device placement, 5 of 26 patients (19.2%) reported pain between 1 and 12 months after device placement, and 8 of 26 patients (30.8%) reported pain onset more than 12 months after microinsert placement.2 In this study, 17.2% of operative reports indicated difficulty with device placement. It is unclear whether difficulty with placement was associated with development of subsequent abdominal or pelvic pain; however, the relevance of initial insertion difficulty diminished with longer follow-up.

Workup and evaluation

We found 5 studies that provided some framework for evaluating a patient with new-onset or worsening pelvic pain after microinsert placement. Overall, correct placement and functionality of the device should be confirmed by either hysterosalpingogram (HSG) or transvaginal ultrasonography (TVUS). The gold standard to determine tubal occlusion is the HSG. However, TVUS may be a dependable alternative, and either test can accurately demonstrate Essure location.19 Patients often prefer TVUS over HSG due to the low cost, minimal discomfort, and short examination time.1 TVUS is a noninvasive and reasonable test to start the initial assessment. The Essure devices are highly echogenic on pelvic ultrasound and easily identifiable by the proximity of the device to the uterotubal junction and its relationship with the surrounding soft tissue. If the device perforates the peritoneal cavity, then the echogenic bowel can impede adequate visualization of the Essure microinsert. If the Essure insert is not visualized on TVUS, an HSG will not only confirm placement but also test insert functionality. After confirming correct placement of the device, the provider can proceed with standard workup for chronic pelvic pain.

If one or more of the devices are malpositioned, the devices are generally presumed to be the etiology of the new pain. Multiple case reports demonstrate pain due to Essure misconfiguration or perforation with subsequent resolution of symptoms after device removal.18,20,21 A case study by Alcantara and colleagues described a patient with chronic pelvic pain and an Essure coil that was curved in an elliptical shape, not adhering to the anatomic course of the fallopian tube. The patient reported pain resolution after laparoscopic removal of the device.20 Another case report by Mahmoud et al described a subserosal malpositioned device that caused acute pelvic pain 4 months after sterilization. The patient reported resolution of pain after the microinsert was removed via laparoscopy.21 These reports highlight the importance of considering malpositioned devices as the etiology of new pelvic pain after Essure placement.

Continue to: Device removal and patient outcomes...

 

 

Device removal and patient outcomes

Removal

Several studies that we evaluated included a discussion on the methods for Essure removal. which are divided into 2 general categories: hysteroscopy and laparoscopy.

Hysteroscopic removal is generally used when the device was placed less than 12 weeks prior to removal.7,19 After 12 weeks, removal is more difficult due to fibrosis within the fallopian tubes. A risk with hysteroscopic removal is failure to remove all fibers, which allows inflammation and fibrosis to continue.7 This risk is mitigated via laparoscopic hysterectomy or mini-cornuectomy with bilateral salpingectomy, where the devices can be removed en bloc and without excessive traction.

Laparoscopic Essure removal procedures described in the literature include salpingostomy and traction on the device, salpingectomy, and salpingectomy with mini-cornuectomy. The incision and traction method is typically performed via a 2- to 3-cm incision on the antimesial edge of the fallopian tube along with a circumferential incision to surround the interstitial tubal area. The implant is carefully extracted from the fallopian tube and cornua, and a salpingectomy is then performed.22 The implant is removed prior to the salpingectomy to ensure that the Essure device is removed in its entirety prior to performing a salpingectomy.

A prospective observational study evaluated laparoscopic removal of Essure devices in 80 women with or without cornual excision. Results suggest that the incision and traction method poses more technical difficulties than the cornuectomy approach.23 Surgeons reported significant difficulty controlling the tensile pressure with traction, whereas use of the cornuectomy approach eliminated this risk and decreased the risk of fragmentation and incomplete removal.23,24

Charavil and colleagues demonstrated in a prospective observational study that a vaginal hysterectomy with bilateral salpingectomy is a feasible approach to Essure removal. Twenty-six vaginal hysterectomies with bilateral salpingectomy and Essure removal were performed without conversion to laparoscopy or laparotomy. The surgeons performed an en bloc removal of each hemiuterus along with the ipsilateral tube, which ensured complete removal of the Essure device. Each case was confirmed with an x-ray of the surgical specimen.25

If device fragmentation occurs, there are different methods recommended for locating fragments. A case report of bilateral uterine perforation after uncomplicated Essure placement used a preoperative computed tomography (CT) scan to locate the Essure fragments, but no intraoperative imaging was performed to confirm complete fragment removal.26 The patient continued reporting chronic pelvic pain and ultimately underwent exploratory laparotomy with intraoperative fluoroscopy. Using fluoroscopy, investigators identified omental fragments that were missed on preoperative CT imaging. Fluoroscopy is not commonly used intraoperatively, but it may have added benefit for localizing retained fragments.

A retrospective cohort study reviewed the use of intraoperative x-ray of the removed specimen to confirm complete Essure removal.27 If an x-ray of the removed specimen showed incomplete removal, an intraoperative pelvic x-ray was performed to locate missing fragments. X-ray of the removed devices confirmed complete removal in 63 of 72 patients (87.5%). Six of 9 women with an unsatisfactory specimen x-ray had no residual fragments identified during pelvic x-ray, and the device removal was deemed adequate. The remaining 3 women had radiologic evidence of incomplete device removal and required additional dissection for complete removal. Overall, use of x-ray or fluoroscopy is a relatively safe and accessible way to ensure complete removal of the Essure device and is worth consideration, especially when retained device fragments are suspected.

Symptom resolution

We reviewed 5 studies that examined pain outcomes after removal of the Essure devices. Casey et al found that 23 of 26 patients (88.5%) reported significant pain relief at the postoperative visit, while 3 of 26 (11.5%) reported persistent pelvic pain.2 Two of 3 case series examined other outcomes in addition to postoperative pelvic pain, including sexual function and activities of daily living.7,14 In the first case series by Brito and colleagues, 8 of 11 patients (72.7%) reported an improvement in pelvic pain, ability to perform daily activities, sexual life, and overall quality of life after Essure removal. For the remaining 3 patients with persistent pelvic pain after surgical removal of the device, 2 patients reported worsening pain symptoms and dyspareunia.14 In this study, 5 of 11 patients reported a history of chronic pelvic pain at baseline. In a retrospective case series by Clark et al, 28 of 32 women (87.5%) reported some improvement in all domains, with 24 of 32 patients (75%) reporting almost total or complete improvement in quality of life, sexual life, pelvic pain, and scores related to activities of daily living. Pain and quality-of-life scores were similar for women who underwent uterine-preserving surgery and for those who underwent hysterectomy. Ten of 32 women (31.3%) reported persistent or worsening symptoms after the Essure removal surgery. In these patients, the authors recommended consideration of other autoimmune and hypersensitivity etiologies.7

In a retrospective cohort study by Kamencic et al from 2002 to 2013 of 1,430 patients who underwent Essure placement with postplacement imaging, 62 patients (4.3%) required a second surgery after Essure placement due to pelvic pain.10 This study also found that 4 of 62 patients (0.3%) had no other obvious cause for the pelvic pain. All 4 of these women had complete resolution of their pain with removal of the Essure microinsert device. A prospective observational study by Chene et al examined health-related quality-of-life outcomes in 80 women who underwent laparoscopic Essure removal for pelvic pain. This survey study demonstrated significant improvement in the quality of life in both psychological and physical aspects, and these results were maintained at 3- and 6-month follow-up examinations.23

Summary

Although Essure products were withdrawn from the market in the United States in 2018, many patients still experience significant AEs associated with the device. The goal of the perspectives and data presented here is to assist clinicians in addressing and managing the pain experienced by patients after device insertion. ●

 

​​​​​​​

References

 

  1. Connor VF. Essure: a review six years later. J Minim Invasive Gynecol. 2009;16:282-290. doi:10.1016/j.jmig.2009.02.009.
  2. Casey J, Aguirre F, Yunker A. Outcomes of laparoscopic removal of the Essure sterilization device for pelvic pain: a case series. Contraception. 2016;94:190-192. doi:10.1016/j.contraception.2016.03.017.
  3. Jackson I. Essure device removed entirely from market, with 99% of unused birth control implants retrieved: FDA. AboutLawsuits.com. January 13, 2020. https://www.aboutlawsuits.com/Essure-removal-update-166509. Accessed June 7, 2022.
  4. US Food and Drug Administration. Labeling for permanent hysteroscopically-placed tubal implants intended for sterilization. October 31, 2016. https://www.fda.gov/media/96315/download. Accessed June 7, 2022.
  5. US Food and Drug Administration. FDA activities related to Essure. March 14, 2022. https://www.fda.gov/medical-devices/essure-permanent-birth-control/fda-activities-related-essure. Accessed June 8, 2022.
  6. Arjona Berral JE, Rodríguez Jiménez B, Velasco Sánchez E, et al. Essure and chronic pelvic pain: a population-based cohort. J Obstet Gynaecol. 2014;34:712-713. doi:10.3109/01443615.2014.92075.
  7. Clark NV, Rademaker D, Mushinski AA, et al. Essure removal for the treatment of device-attributed symptoms: an expanded case series and follow-up survey. J Minim Invasive Gynecol. 2017;24:971-976. doi:10.1016/j.jmig.2017.05.015.
  8. Sills ES, Rickers NS, Li X. Surgical management after hysteroscopic sterilization: minimally invasive approach incorporating intraoperative fluoroscopy for symptomatic patients with >2 Essure devices. Surg Technol Int. 2018;32:156-161.
  9. Administration USF and D. 522 Postmarket Surveillance Studies. Center for Devices and Radiological Health; 2020.
  10. Kamencic H, Thiel L, Karreman E, et al. Does Essure cause significant de novo pain? A retrospective review of indications for second surgeries after Essure placement. J Minim Invasive Gynecol. 2016;23:1158-1162. doi:10.1016/j.jmig.2016.08.823.
  11. Yunker AC, Ritch JM, Robinson EF, et al. Incidence and risk factors for chronic pelvic pain after hysteroscopic sterilization. J Minim Invasive Gynecol. 2015;22:390-994. doi:10.1016/j.jmig.2014.06.007.
  12. Phillips K, Clauw DJ. Central pain mechanisms in chronic pain states--maybe it is all in their head. Best Pract Res Clin Rheumatol. 2011;25:141-154. doi:10.1016/j.berh.2011.02.005.
  13. van Limburg Stirum EVJ, Clark NV, Lindsey A, et al. Factors associated with negative patient experiences with Essure sterilization. JSLS. 2020;24(1):e2019.00065. doi:10.4293/JSLS.2019.00065.
  14. Brito LG, Cohen SL, Goggins ER, et al. Essure surgical removal and subsequent symptom resolution: case series and follow-up survey. J Minim Invasive Gynecol. 2015;22:910-913. doi:10.1016/j.jmig.2015.03.018.
  15. Maassen LW, van Gastel DM, Haveman I, et al. Removal of Essure sterilization devices: a retrospective cohort study in the Netherlands. J Minim Invasive Gynecol. 2019;26:1056-1062. doi:10.1016/j.jmig.2018.10.009.
  16. Sills ES, Palermo GD. Surgical excision of Essure devices with ESHRE class IIb uterine malformation: sequential hysteroscopic-laparoscopic approach to the septate uterus. Facts Views Vis Obgyn. 2016;8:49-52.
  17. Ricci G, Restaino S, Di Lorenzo G, et al. Risk of Essure microinsert abdominal migration: case report and review of literature. Ther Clin Risk Manag. 2014;10:963-968. doi:10.2147/TCRM.S65634.
  18. Borley J, Shabajee N, Tan TL. A kink is not always a perforation: assessing Essure hysteroscopic sterilization placement. Fertil Steril. 2011;95:2429.e15-7. doi:10.1016/j.fertnstert.2011.02.006.
  19. Djeffal H, Blouet M, Pizzoferato AC, et al. Imaging findings in Essure-related complications: a pictorial review.7Br J Radiol. 2018;91(1090):20170686. doi:10.1259/bjr.20170686.
  20. Lora Alcantara I, Rezai S, Kirby C, et al. Essure surgical removal and subsequent resolution of chronic pelvic pain: a case report and review of the literature. Case Rep Obstet Gynecol. 2016;2016:6961202. doi:10.1155/2016/6961202.
  21. Mahmoud MS, Fridman D, Merhi ZO. Subserosal misplacement of Essure device manifested by late-onset acute pelvic pain. Fertil Steril. 2009;92:2038.e1-3. doi:10.1016/j.fertnstert.2009.07.1677.
  22. Tissot M, Petry S, Lecointre L, et al. Two surgical techniques for Essure device ablation: the hysteroscopic way and the laparoscopic way by salpingectomy with tubal interstitial resection. J Minim Invasive Gynecol. 2019;26(4):603. doi:10.1016/j.jmig.2018.07.017.
  23. Chene G, Cerruto E, Moret S, et al. Quality of life after laparoscopic removal of Essure sterilization devices. Eur J Obstet Gynecol Reprod Biol X. 2019;3:100054. doi:10.1016/j.eurox.2019.100054.
  24. Thiel L, Rattray D, Thiel J. Laparoscopic cornuectomy as a technique for removal of Essure microinserts. J Minim Invasive Gynecol. 2017;24(1):10. doi:10.1016/j.jmig.2016.07.004.
  25. Charavil A, Agostini A, Rambeaud C, et al. Vaginal hysterectomy with salpingectomy for Essure insert removal. J Minim Invasive Gynecol. 2019;2:695-701. doi:10.1016/j.jmig.2018.07.019.
  26. Howard DL, Christenson PJ, Strickland JL. Use of intraoperative fluoroscopy during laparotomy to identify fragments of retained Essure microinserts: case report. J Minim Invasive Gynecol. 2012;19:667-670. doi:10.1016/j.jmig.2012.04.007.
  27. Miquel L, Crochet P, Francini S, et al. Laparoscopic Essure device removal by en bloc salpingectomy-cornuectomy with intraoperative x-ray checking: a retrospective cohort study. J Minim Invasive Gynecol. 2020;27:697-703. doi:10.1016/j. jmig.2019.06.006. 
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Dr. Shammas is Chief Resident, Department of Obstetrics and Gynecology, Adventist Health White Memorial Medical Center, Los Angeles, California.

Dr. Qu is a fellow in mininally invasive gynecology, Department of Obstetrics and Gynecology, Virginia Mason Franciscan Health, Seattle, Washington.

Dr. Woodburn is Assistant Professor, Female Pelvic Medicine and Reconstructive Surgery, Department of Urology/Female Pelvic Health, Wake Forrest Baptist Medical Center, Winston-Salem, North Carolina.

Dr. Brunn is mininally invasive gynecologic surgeon, Department of Obstetrics and Gynecology, Virgina Hospital Center, Arlington.

Dr. Morozov is Director, AAGL Fellowship in Minimally Invasive Gynecologic Surgery (MIGS), National Center for Advanced Pelvic Surgery, MedStar Washington Hospital Center, and Associate Professor, Department of Obstetrics and Gynecology, Georgetown University School of Medicine, Washington DC.

Dr. Robinson is Director, MIGS and Associate Program Director, AAGL MIGS Fellowship, National Center for Advanced Pelvic Surgery, MedStar Washington Hospital Center.

Dr. Iglesia is Director, Section of Female Pelvic Medicine and Reconstructive Surgery, Medstar Washington Hospital Center, and Professor, Departments of Obstetrics and Gynecology and Urology, Georgetown University School of Medicine.

Dr. Hazen is Assistant Professor and Director of Research and Education, AAGL MIGS Fellowship, Department of Obstetrics and Gynecology, MedStar Georgetown University Hospital, Washington DC.

Dr. Morozov reports receiving royalties from Olympus America, being a paid consultant for Medtronic, being a speaker for Abbvie and Lumenis, having a patent pending at the University of Maryland and Olympus America, and having stock in Titan Medical and Ascensus Surgical. Dr. Iglesia reports being the chairperson of the US Food and Drug Administration ObGyn device review panel for the Essure device review in 2015. The remaining authors report no financial relationships relevant to this article.

 

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Dr. Shammas is Chief Resident, Department of Obstetrics and Gynecology, Adventist Health White Memorial Medical Center, Los Angeles, California.

Dr. Qu is a fellow in mininally invasive gynecology, Department of Obstetrics and Gynecology, Virginia Mason Franciscan Health, Seattle, Washington.

Dr. Woodburn is Assistant Professor, Female Pelvic Medicine and Reconstructive Surgery, Department of Urology/Female Pelvic Health, Wake Forrest Baptist Medical Center, Winston-Salem, North Carolina.

Dr. Brunn is mininally invasive gynecologic surgeon, Department of Obstetrics and Gynecology, Virgina Hospital Center, Arlington.

Dr. Morozov is Director, AAGL Fellowship in Minimally Invasive Gynecologic Surgery (MIGS), National Center for Advanced Pelvic Surgery, MedStar Washington Hospital Center, and Associate Professor, Department of Obstetrics and Gynecology, Georgetown University School of Medicine, Washington DC.

Dr. Robinson is Director, MIGS and Associate Program Director, AAGL MIGS Fellowship, National Center for Advanced Pelvic Surgery, MedStar Washington Hospital Center.

Dr. Iglesia is Director, Section of Female Pelvic Medicine and Reconstructive Surgery, Medstar Washington Hospital Center, and Professor, Departments of Obstetrics and Gynecology and Urology, Georgetown University School of Medicine.

Dr. Hazen is Assistant Professor and Director of Research and Education, AAGL MIGS Fellowship, Department of Obstetrics and Gynecology, MedStar Georgetown University Hospital, Washington DC.

Dr. Morozov reports receiving royalties from Olympus America, being a paid consultant for Medtronic, being a speaker for Abbvie and Lumenis, having a patent pending at the University of Maryland and Olympus America, and having stock in Titan Medical and Ascensus Surgical. Dr. Iglesia reports being the chairperson of the US Food and Drug Administration ObGyn device review panel for the Essure device review in 2015. The remaining authors report no financial relationships relevant to this article.

 

Author and Disclosure Information

 

Dr. Shammas is Chief Resident, Department of Obstetrics and Gynecology, Adventist Health White Memorial Medical Center, Los Angeles, California.

Dr. Qu is a fellow in mininally invasive gynecology, Department of Obstetrics and Gynecology, Virginia Mason Franciscan Health, Seattle, Washington.

Dr. Woodburn is Assistant Professor, Female Pelvic Medicine and Reconstructive Surgery, Department of Urology/Female Pelvic Health, Wake Forrest Baptist Medical Center, Winston-Salem, North Carolina.

Dr. Brunn is mininally invasive gynecologic surgeon, Department of Obstetrics and Gynecology, Virgina Hospital Center, Arlington.

Dr. Morozov is Director, AAGL Fellowship in Minimally Invasive Gynecologic Surgery (MIGS), National Center for Advanced Pelvic Surgery, MedStar Washington Hospital Center, and Associate Professor, Department of Obstetrics and Gynecology, Georgetown University School of Medicine, Washington DC.

Dr. Robinson is Director, MIGS and Associate Program Director, AAGL MIGS Fellowship, National Center for Advanced Pelvic Surgery, MedStar Washington Hospital Center.

Dr. Iglesia is Director, Section of Female Pelvic Medicine and Reconstructive Surgery, Medstar Washington Hospital Center, and Professor, Departments of Obstetrics and Gynecology and Urology, Georgetown University School of Medicine.

Dr. Hazen is Assistant Professor and Director of Research and Education, AAGL MIGS Fellowship, Department of Obstetrics and Gynecology, MedStar Georgetown University Hospital, Washington DC.

Dr. Morozov reports receiving royalties from Olympus America, being a paid consultant for Medtronic, being a speaker for Abbvie and Lumenis, having a patent pending at the University of Maryland and Olympus America, and having stock in Titan Medical and Ascensus Surgical. Dr. Iglesia reports being the chairperson of the US Food and Drug Administration ObGyn device review panel for the Essure device review in 2015. The remaining authors report no financial relationships relevant to this article.

 

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The evaluation and management of chronic pelvic pain in patients with a history of Essure device (Bayer HealthCare Pharmaceuticals Inc, Whippany, New Jersey) insertion have posed many challenges for both clinicians and patients. The availability of high-quality, evidence-based clinical guidance has been limited. We have reviewed the currently available published data, and here provide an overview of takeaways, as well as share our perspective and approach on evaluating and managing chronic pelvic pain in this unique patient population.

The device

The Essure microinsert is a hysteroscopically placed device that facilitates permanent sterilization by occluding the bilateral proximal fallopian tubes. The microinsert has an inner and outer nitinol coil that attaches the device to the proximal fallopian tube to ensure retention. The inner coil releases polyethylene terephthalate fibers that cause tubal fiber proliferation to occlude the lumen of the fallopian tube and achieve sterilization.

The device was first approved by the US Food and Drug Administration (FDA) in 2002. In subsequent years, the device was well received and widely used, with approximately 750,000 women worldwide undergoing Essure placement.1,2 Shortly after approval, many adverse events (AEs), including pelvic pain and abnormal uterine bleeding, were reported, resulting in a public meeting of the FDA Obstetrics and Gynecology Devices Panel in September 2015. A postmarket surveillance study on the device ensued to assess complication rates including unplanned pregnancy, pelvic pain, and surgery for removal. In February 2016, the FDA issued a black box warning and a patient decision checklist.3,4 In December 2018, Bayer stopped selling and distributing Essure in the United States.5 A 4-year follow-up surveillance study on Essure was submitted to the FDA in March 2020.

Adverse outcomes

Common AEs related to the Essure device include heavy uterine bleeding, pelvic pain, and other quality-of-life symptoms such as fatigue and weight gain.6-8 The main safety endpoints for the mandated FDA postmarket 522 surveillance studies were chronic lower abdominal and pelvic pain; abnormal uterine bleeding; hypersensitivity; allergic reaction, as well as autoimmune disorders incorporating inflammatory markers and human leukocyte antigen; and gynecologic surgery for device removal.9 Postmarket surveillence has shown that most AEs are related to placement complications or pelvic pain after Essure insertion. However, there have been several reports of autoimmune diseases categorized as serious AEs, such as new-onset systemic lupus erythematosus, rheumatoid arthritis, and worsening ulcerative colitis, after Essure insertion.5

 

Evaluation of symptoms

Prevalence of pelvic pain following device placement

We conducted a PubMed and MEDLINE search from January 2000 to May 2020, which identified 43 studies citing AEs related to device placement, including pelvic or abdominal pain, abnormal uterine bleeding, hypersensitivity, and autoimmune disorders. A particularly debilitating and frequently cited AE was new-onset pelvic pain or worsening of preexisting pelvic pain. Perforation of the uterus or fallopian tube, resulting in displacement of the device into the peritoneal cavity, or fragmentation of the microinsert was reported as a serious AE that occurred after device placement. However, due to the complexity of chronic pelvic pain pathogenesis, the effect of the insert on patients with existing chronic pelvic pain remains unknown.

Authors of a large retrospective study found that approximately 2.7% of 1,430 patients developed new-onset or worsening pelvic pain after device placement. New-onset pelvic pain in 1% of patients was thought to be secondary to device placement, without a coexisting pathology or diagnosis.10

In a retrospective study by Clark and colleagues, 22 of 50 women (44%) with pelvic pain after microinsert placement were found to have at least one other cause of pelvic pain. The most common alternative diagnoses were endometriosis, adenomyosis, salpingitis, and adhesive disease. Nine of the 50 patients (18%) were found to have endometriosis upon surgical removal of the microinsert.7

Another case series examined outcomes in 29 patients undergoing laparoscopic device removal due to new-onset pelvic pain. Intraoperative findings included endometriosis in 5 patients (17.2%) and pelvic adhesions in 3 (10.3%).2 Chronic pelvic pain secondary to endometriosis may be exacerbated with Essure insertion due to discontinuation of hormonal birth control after device placement,7 and this diagnosis along with adenomyosis should be strongly considered in patients whose pelvic pain began when hormonal contraception was discontinued after placement of the device.

Continue to: Risk factors...

 

 

Risk factors

Authors of a retrospective cohort study found that patients with prior diagnosis of a chronic pain syndrome, low back pain, headaches, or fibromyalgia were 5 to 6 times more likely to report acute and chronic pain after hysteroscopic sterilization with Essure.11 Since chronic pain is often thought to be driven by a hyperalgesic state of the central nervous system, as previously shown in patients with conditions such as vulvodynia, interstitial cystitis, and fibromyalgia,12 a hyperalgesic state can potentially explain why some patients are more susceptible to developing worsening pain.

Van Limburg and colleagues conducted a retrospective cohort study with prospective follow-up on 284 women who underwent Essure sterilization. Among these patients, 48% reported negative AEs; risk factors included young age at placement, increasing gravidity, and no prior abdominal surgery.13

Onset of pain

The timing and onset of pelvic pain vary widely, suggesting there is no particular time frame for this AE after device placement.2,6,14-18 A case series by Arjona and colleagues analyzed the incidence of chronic pelvic pain in 4,274 patients after Essure sterilization. Seven patients (0.16%) reported chronic pelvic pain that necessitated device removal. In 6 of the women, the pelvic pain began within 1 week of device placement. In 3 of the 6 cases, the surgeon reported the removal procedures as “difficult.” In all 6 cases, the level of pelvic pain increased with time and was not alleviated with standard analgesic medications.6

In another case series of 26 patients, the authors evaluated patients undergoing laparoscopic removal of Essure secondary to pelvic pain and reported that the time range for symptom presentation was immediate to 85 months. Thirteen of 26 patients (50%) reported pain onset within less than 1 month of device placement, 5 of 26 patients (19.2%) reported pain between 1 and 12 months after device placement, and 8 of 26 patients (30.8%) reported pain onset more than 12 months after microinsert placement.2 In this study, 17.2% of operative reports indicated difficulty with device placement. It is unclear whether difficulty with placement was associated with development of subsequent abdominal or pelvic pain; however, the relevance of initial insertion difficulty diminished with longer follow-up.

Workup and evaluation

We found 5 studies that provided some framework for evaluating a patient with new-onset or worsening pelvic pain after microinsert placement. Overall, correct placement and functionality of the device should be confirmed by either hysterosalpingogram (HSG) or transvaginal ultrasonography (TVUS). The gold standard to determine tubal occlusion is the HSG. However, TVUS may be a dependable alternative, and either test can accurately demonstrate Essure location.19 Patients often prefer TVUS over HSG due to the low cost, minimal discomfort, and short examination time.1 TVUS is a noninvasive and reasonable test to start the initial assessment. The Essure devices are highly echogenic on pelvic ultrasound and easily identifiable by the proximity of the device to the uterotubal junction and its relationship with the surrounding soft tissue. If the device perforates the peritoneal cavity, then the echogenic bowel can impede adequate visualization of the Essure microinsert. If the Essure insert is not visualized on TVUS, an HSG will not only confirm placement but also test insert functionality. After confirming correct placement of the device, the provider can proceed with standard workup for chronic pelvic pain.

If one or more of the devices are malpositioned, the devices are generally presumed to be the etiology of the new pain. Multiple case reports demonstrate pain due to Essure misconfiguration or perforation with subsequent resolution of symptoms after device removal.18,20,21 A case study by Alcantara and colleagues described a patient with chronic pelvic pain and an Essure coil that was curved in an elliptical shape, not adhering to the anatomic course of the fallopian tube. The patient reported pain resolution after laparoscopic removal of the device.20 Another case report by Mahmoud et al described a subserosal malpositioned device that caused acute pelvic pain 4 months after sterilization. The patient reported resolution of pain after the microinsert was removed via laparoscopy.21 These reports highlight the importance of considering malpositioned devices as the etiology of new pelvic pain after Essure placement.

Continue to: Device removal and patient outcomes...

 

 

Device removal and patient outcomes

Removal

Several studies that we evaluated included a discussion on the methods for Essure removal. which are divided into 2 general categories: hysteroscopy and laparoscopy.

Hysteroscopic removal is generally used when the device was placed less than 12 weeks prior to removal.7,19 After 12 weeks, removal is more difficult due to fibrosis within the fallopian tubes. A risk with hysteroscopic removal is failure to remove all fibers, which allows inflammation and fibrosis to continue.7 This risk is mitigated via laparoscopic hysterectomy or mini-cornuectomy with bilateral salpingectomy, where the devices can be removed en bloc and without excessive traction.

Laparoscopic Essure removal procedures described in the literature include salpingostomy and traction on the device, salpingectomy, and salpingectomy with mini-cornuectomy. The incision and traction method is typically performed via a 2- to 3-cm incision on the antimesial edge of the fallopian tube along with a circumferential incision to surround the interstitial tubal area. The implant is carefully extracted from the fallopian tube and cornua, and a salpingectomy is then performed.22 The implant is removed prior to the salpingectomy to ensure that the Essure device is removed in its entirety prior to performing a salpingectomy.

A prospective observational study evaluated laparoscopic removal of Essure devices in 80 women with or without cornual excision. Results suggest that the incision and traction method poses more technical difficulties than the cornuectomy approach.23 Surgeons reported significant difficulty controlling the tensile pressure with traction, whereas use of the cornuectomy approach eliminated this risk and decreased the risk of fragmentation and incomplete removal.23,24

Charavil and colleagues demonstrated in a prospective observational study that a vaginal hysterectomy with bilateral salpingectomy is a feasible approach to Essure removal. Twenty-six vaginal hysterectomies with bilateral salpingectomy and Essure removal were performed without conversion to laparoscopy or laparotomy. The surgeons performed an en bloc removal of each hemiuterus along with the ipsilateral tube, which ensured complete removal of the Essure device. Each case was confirmed with an x-ray of the surgical specimen.25

If device fragmentation occurs, there are different methods recommended for locating fragments. A case report of bilateral uterine perforation after uncomplicated Essure placement used a preoperative computed tomography (CT) scan to locate the Essure fragments, but no intraoperative imaging was performed to confirm complete fragment removal.26 The patient continued reporting chronic pelvic pain and ultimately underwent exploratory laparotomy with intraoperative fluoroscopy. Using fluoroscopy, investigators identified omental fragments that were missed on preoperative CT imaging. Fluoroscopy is not commonly used intraoperatively, but it may have added benefit for localizing retained fragments.

A retrospective cohort study reviewed the use of intraoperative x-ray of the removed specimen to confirm complete Essure removal.27 If an x-ray of the removed specimen showed incomplete removal, an intraoperative pelvic x-ray was performed to locate missing fragments. X-ray of the removed devices confirmed complete removal in 63 of 72 patients (87.5%). Six of 9 women with an unsatisfactory specimen x-ray had no residual fragments identified during pelvic x-ray, and the device removal was deemed adequate. The remaining 3 women had radiologic evidence of incomplete device removal and required additional dissection for complete removal. Overall, use of x-ray or fluoroscopy is a relatively safe and accessible way to ensure complete removal of the Essure device and is worth consideration, especially when retained device fragments are suspected.

Symptom resolution

We reviewed 5 studies that examined pain outcomes after removal of the Essure devices. Casey et al found that 23 of 26 patients (88.5%) reported significant pain relief at the postoperative visit, while 3 of 26 (11.5%) reported persistent pelvic pain.2 Two of 3 case series examined other outcomes in addition to postoperative pelvic pain, including sexual function and activities of daily living.7,14 In the first case series by Brito and colleagues, 8 of 11 patients (72.7%) reported an improvement in pelvic pain, ability to perform daily activities, sexual life, and overall quality of life after Essure removal. For the remaining 3 patients with persistent pelvic pain after surgical removal of the device, 2 patients reported worsening pain symptoms and dyspareunia.14 In this study, 5 of 11 patients reported a history of chronic pelvic pain at baseline. In a retrospective case series by Clark et al, 28 of 32 women (87.5%) reported some improvement in all domains, with 24 of 32 patients (75%) reporting almost total or complete improvement in quality of life, sexual life, pelvic pain, and scores related to activities of daily living. Pain and quality-of-life scores were similar for women who underwent uterine-preserving surgery and for those who underwent hysterectomy. Ten of 32 women (31.3%) reported persistent or worsening symptoms after the Essure removal surgery. In these patients, the authors recommended consideration of other autoimmune and hypersensitivity etiologies.7

In a retrospective cohort study by Kamencic et al from 2002 to 2013 of 1,430 patients who underwent Essure placement with postplacement imaging, 62 patients (4.3%) required a second surgery after Essure placement due to pelvic pain.10 This study also found that 4 of 62 patients (0.3%) had no other obvious cause for the pelvic pain. All 4 of these women had complete resolution of their pain with removal of the Essure microinsert device. A prospective observational study by Chene et al examined health-related quality-of-life outcomes in 80 women who underwent laparoscopic Essure removal for pelvic pain. This survey study demonstrated significant improvement in the quality of life in both psychological and physical aspects, and these results were maintained at 3- and 6-month follow-up examinations.23

Summary

Although Essure products were withdrawn from the market in the United States in 2018, many patients still experience significant AEs associated with the device. The goal of the perspectives and data presented here is to assist clinicians in addressing and managing the pain experienced by patients after device insertion. ●

 

​​​​​​​

 

 

The evaluation and management of chronic pelvic pain in patients with a history of Essure device (Bayer HealthCare Pharmaceuticals Inc, Whippany, New Jersey) insertion have posed many challenges for both clinicians and patients. The availability of high-quality, evidence-based clinical guidance has been limited. We have reviewed the currently available published data, and here provide an overview of takeaways, as well as share our perspective and approach on evaluating and managing chronic pelvic pain in this unique patient population.

The device

The Essure microinsert is a hysteroscopically placed device that facilitates permanent sterilization by occluding the bilateral proximal fallopian tubes. The microinsert has an inner and outer nitinol coil that attaches the device to the proximal fallopian tube to ensure retention. The inner coil releases polyethylene terephthalate fibers that cause tubal fiber proliferation to occlude the lumen of the fallopian tube and achieve sterilization.

The device was first approved by the US Food and Drug Administration (FDA) in 2002. In subsequent years, the device was well received and widely used, with approximately 750,000 women worldwide undergoing Essure placement.1,2 Shortly after approval, many adverse events (AEs), including pelvic pain and abnormal uterine bleeding, were reported, resulting in a public meeting of the FDA Obstetrics and Gynecology Devices Panel in September 2015. A postmarket surveillance study on the device ensued to assess complication rates including unplanned pregnancy, pelvic pain, and surgery for removal. In February 2016, the FDA issued a black box warning and a patient decision checklist.3,4 In December 2018, Bayer stopped selling and distributing Essure in the United States.5 A 4-year follow-up surveillance study on Essure was submitted to the FDA in March 2020.

Adverse outcomes

Common AEs related to the Essure device include heavy uterine bleeding, pelvic pain, and other quality-of-life symptoms such as fatigue and weight gain.6-8 The main safety endpoints for the mandated FDA postmarket 522 surveillance studies were chronic lower abdominal and pelvic pain; abnormal uterine bleeding; hypersensitivity; allergic reaction, as well as autoimmune disorders incorporating inflammatory markers and human leukocyte antigen; and gynecologic surgery for device removal.9 Postmarket surveillence has shown that most AEs are related to placement complications or pelvic pain after Essure insertion. However, there have been several reports of autoimmune diseases categorized as serious AEs, such as new-onset systemic lupus erythematosus, rheumatoid arthritis, and worsening ulcerative colitis, after Essure insertion.5

 

Evaluation of symptoms

Prevalence of pelvic pain following device placement

We conducted a PubMed and MEDLINE search from January 2000 to May 2020, which identified 43 studies citing AEs related to device placement, including pelvic or abdominal pain, abnormal uterine bleeding, hypersensitivity, and autoimmune disorders. A particularly debilitating and frequently cited AE was new-onset pelvic pain or worsening of preexisting pelvic pain. Perforation of the uterus or fallopian tube, resulting in displacement of the device into the peritoneal cavity, or fragmentation of the microinsert was reported as a serious AE that occurred after device placement. However, due to the complexity of chronic pelvic pain pathogenesis, the effect of the insert on patients with existing chronic pelvic pain remains unknown.

Authors of a large retrospective study found that approximately 2.7% of 1,430 patients developed new-onset or worsening pelvic pain after device placement. New-onset pelvic pain in 1% of patients was thought to be secondary to device placement, without a coexisting pathology or diagnosis.10

In a retrospective study by Clark and colleagues, 22 of 50 women (44%) with pelvic pain after microinsert placement were found to have at least one other cause of pelvic pain. The most common alternative diagnoses were endometriosis, adenomyosis, salpingitis, and adhesive disease. Nine of the 50 patients (18%) were found to have endometriosis upon surgical removal of the microinsert.7

Another case series examined outcomes in 29 patients undergoing laparoscopic device removal due to new-onset pelvic pain. Intraoperative findings included endometriosis in 5 patients (17.2%) and pelvic adhesions in 3 (10.3%).2 Chronic pelvic pain secondary to endometriosis may be exacerbated with Essure insertion due to discontinuation of hormonal birth control after device placement,7 and this diagnosis along with adenomyosis should be strongly considered in patients whose pelvic pain began when hormonal contraception was discontinued after placement of the device.

Continue to: Risk factors...

 

 

Risk factors

Authors of a retrospective cohort study found that patients with prior diagnosis of a chronic pain syndrome, low back pain, headaches, or fibromyalgia were 5 to 6 times more likely to report acute and chronic pain after hysteroscopic sterilization with Essure.11 Since chronic pain is often thought to be driven by a hyperalgesic state of the central nervous system, as previously shown in patients with conditions such as vulvodynia, interstitial cystitis, and fibromyalgia,12 a hyperalgesic state can potentially explain why some patients are more susceptible to developing worsening pain.

Van Limburg and colleagues conducted a retrospective cohort study with prospective follow-up on 284 women who underwent Essure sterilization. Among these patients, 48% reported negative AEs; risk factors included young age at placement, increasing gravidity, and no prior abdominal surgery.13

Onset of pain

The timing and onset of pelvic pain vary widely, suggesting there is no particular time frame for this AE after device placement.2,6,14-18 A case series by Arjona and colleagues analyzed the incidence of chronic pelvic pain in 4,274 patients after Essure sterilization. Seven patients (0.16%) reported chronic pelvic pain that necessitated device removal. In 6 of the women, the pelvic pain began within 1 week of device placement. In 3 of the 6 cases, the surgeon reported the removal procedures as “difficult.” In all 6 cases, the level of pelvic pain increased with time and was not alleviated with standard analgesic medications.6

In another case series of 26 patients, the authors evaluated patients undergoing laparoscopic removal of Essure secondary to pelvic pain and reported that the time range for symptom presentation was immediate to 85 months. Thirteen of 26 patients (50%) reported pain onset within less than 1 month of device placement, 5 of 26 patients (19.2%) reported pain between 1 and 12 months after device placement, and 8 of 26 patients (30.8%) reported pain onset more than 12 months after microinsert placement.2 In this study, 17.2% of operative reports indicated difficulty with device placement. It is unclear whether difficulty with placement was associated with development of subsequent abdominal or pelvic pain; however, the relevance of initial insertion difficulty diminished with longer follow-up.

Workup and evaluation

We found 5 studies that provided some framework for evaluating a patient with new-onset or worsening pelvic pain after microinsert placement. Overall, correct placement and functionality of the device should be confirmed by either hysterosalpingogram (HSG) or transvaginal ultrasonography (TVUS). The gold standard to determine tubal occlusion is the HSG. However, TVUS may be a dependable alternative, and either test can accurately demonstrate Essure location.19 Patients often prefer TVUS over HSG due to the low cost, minimal discomfort, and short examination time.1 TVUS is a noninvasive and reasonable test to start the initial assessment. The Essure devices are highly echogenic on pelvic ultrasound and easily identifiable by the proximity of the device to the uterotubal junction and its relationship with the surrounding soft tissue. If the device perforates the peritoneal cavity, then the echogenic bowel can impede adequate visualization of the Essure microinsert. If the Essure insert is not visualized on TVUS, an HSG will not only confirm placement but also test insert functionality. After confirming correct placement of the device, the provider can proceed with standard workup for chronic pelvic pain.

If one or more of the devices are malpositioned, the devices are generally presumed to be the etiology of the new pain. Multiple case reports demonstrate pain due to Essure misconfiguration or perforation with subsequent resolution of symptoms after device removal.18,20,21 A case study by Alcantara and colleagues described a patient with chronic pelvic pain and an Essure coil that was curved in an elliptical shape, not adhering to the anatomic course of the fallopian tube. The patient reported pain resolution after laparoscopic removal of the device.20 Another case report by Mahmoud et al described a subserosal malpositioned device that caused acute pelvic pain 4 months after sterilization. The patient reported resolution of pain after the microinsert was removed via laparoscopy.21 These reports highlight the importance of considering malpositioned devices as the etiology of new pelvic pain after Essure placement.

Continue to: Device removal and patient outcomes...

 

 

Device removal and patient outcomes

Removal

Several studies that we evaluated included a discussion on the methods for Essure removal. which are divided into 2 general categories: hysteroscopy and laparoscopy.

Hysteroscopic removal is generally used when the device was placed less than 12 weeks prior to removal.7,19 After 12 weeks, removal is more difficult due to fibrosis within the fallopian tubes. A risk with hysteroscopic removal is failure to remove all fibers, which allows inflammation and fibrosis to continue.7 This risk is mitigated via laparoscopic hysterectomy or mini-cornuectomy with bilateral salpingectomy, where the devices can be removed en bloc and without excessive traction.

Laparoscopic Essure removal procedures described in the literature include salpingostomy and traction on the device, salpingectomy, and salpingectomy with mini-cornuectomy. The incision and traction method is typically performed via a 2- to 3-cm incision on the antimesial edge of the fallopian tube along with a circumferential incision to surround the interstitial tubal area. The implant is carefully extracted from the fallopian tube and cornua, and a salpingectomy is then performed.22 The implant is removed prior to the salpingectomy to ensure that the Essure device is removed in its entirety prior to performing a salpingectomy.

A prospective observational study evaluated laparoscopic removal of Essure devices in 80 women with or without cornual excision. Results suggest that the incision and traction method poses more technical difficulties than the cornuectomy approach.23 Surgeons reported significant difficulty controlling the tensile pressure with traction, whereas use of the cornuectomy approach eliminated this risk and decreased the risk of fragmentation and incomplete removal.23,24

Charavil and colleagues demonstrated in a prospective observational study that a vaginal hysterectomy with bilateral salpingectomy is a feasible approach to Essure removal. Twenty-six vaginal hysterectomies with bilateral salpingectomy and Essure removal were performed without conversion to laparoscopy or laparotomy. The surgeons performed an en bloc removal of each hemiuterus along with the ipsilateral tube, which ensured complete removal of the Essure device. Each case was confirmed with an x-ray of the surgical specimen.25

If device fragmentation occurs, there are different methods recommended for locating fragments. A case report of bilateral uterine perforation after uncomplicated Essure placement used a preoperative computed tomography (CT) scan to locate the Essure fragments, but no intraoperative imaging was performed to confirm complete fragment removal.26 The patient continued reporting chronic pelvic pain and ultimately underwent exploratory laparotomy with intraoperative fluoroscopy. Using fluoroscopy, investigators identified omental fragments that were missed on preoperative CT imaging. Fluoroscopy is not commonly used intraoperatively, but it may have added benefit for localizing retained fragments.

A retrospective cohort study reviewed the use of intraoperative x-ray of the removed specimen to confirm complete Essure removal.27 If an x-ray of the removed specimen showed incomplete removal, an intraoperative pelvic x-ray was performed to locate missing fragments. X-ray of the removed devices confirmed complete removal in 63 of 72 patients (87.5%). Six of 9 women with an unsatisfactory specimen x-ray had no residual fragments identified during pelvic x-ray, and the device removal was deemed adequate. The remaining 3 women had radiologic evidence of incomplete device removal and required additional dissection for complete removal. Overall, use of x-ray or fluoroscopy is a relatively safe and accessible way to ensure complete removal of the Essure device and is worth consideration, especially when retained device fragments are suspected.

Symptom resolution

We reviewed 5 studies that examined pain outcomes after removal of the Essure devices. Casey et al found that 23 of 26 patients (88.5%) reported significant pain relief at the postoperative visit, while 3 of 26 (11.5%) reported persistent pelvic pain.2 Two of 3 case series examined other outcomes in addition to postoperative pelvic pain, including sexual function and activities of daily living.7,14 In the first case series by Brito and colleagues, 8 of 11 patients (72.7%) reported an improvement in pelvic pain, ability to perform daily activities, sexual life, and overall quality of life after Essure removal. For the remaining 3 patients with persistent pelvic pain after surgical removal of the device, 2 patients reported worsening pain symptoms and dyspareunia.14 In this study, 5 of 11 patients reported a history of chronic pelvic pain at baseline. In a retrospective case series by Clark et al, 28 of 32 women (87.5%) reported some improvement in all domains, with 24 of 32 patients (75%) reporting almost total or complete improvement in quality of life, sexual life, pelvic pain, and scores related to activities of daily living. Pain and quality-of-life scores were similar for women who underwent uterine-preserving surgery and for those who underwent hysterectomy. Ten of 32 women (31.3%) reported persistent or worsening symptoms after the Essure removal surgery. In these patients, the authors recommended consideration of other autoimmune and hypersensitivity etiologies.7

In a retrospective cohort study by Kamencic et al from 2002 to 2013 of 1,430 patients who underwent Essure placement with postplacement imaging, 62 patients (4.3%) required a second surgery after Essure placement due to pelvic pain.10 This study also found that 4 of 62 patients (0.3%) had no other obvious cause for the pelvic pain. All 4 of these women had complete resolution of their pain with removal of the Essure microinsert device. A prospective observational study by Chene et al examined health-related quality-of-life outcomes in 80 women who underwent laparoscopic Essure removal for pelvic pain. This survey study demonstrated significant improvement in the quality of life in both psychological and physical aspects, and these results were maintained at 3- and 6-month follow-up examinations.23

Summary

Although Essure products were withdrawn from the market in the United States in 2018, many patients still experience significant AEs associated with the device. The goal of the perspectives and data presented here is to assist clinicians in addressing and managing the pain experienced by patients after device insertion. ●

 

​​​​​​​

References

 

  1. Connor VF. Essure: a review six years later. J Minim Invasive Gynecol. 2009;16:282-290. doi:10.1016/j.jmig.2009.02.009.
  2. Casey J, Aguirre F, Yunker A. Outcomes of laparoscopic removal of the Essure sterilization device for pelvic pain: a case series. Contraception. 2016;94:190-192. doi:10.1016/j.contraception.2016.03.017.
  3. Jackson I. Essure device removed entirely from market, with 99% of unused birth control implants retrieved: FDA. AboutLawsuits.com. January 13, 2020. https://www.aboutlawsuits.com/Essure-removal-update-166509. Accessed June 7, 2022.
  4. US Food and Drug Administration. Labeling for permanent hysteroscopically-placed tubal implants intended for sterilization. October 31, 2016. https://www.fda.gov/media/96315/download. Accessed June 7, 2022.
  5. US Food and Drug Administration. FDA activities related to Essure. March 14, 2022. https://www.fda.gov/medical-devices/essure-permanent-birth-control/fda-activities-related-essure. Accessed June 8, 2022.
  6. Arjona Berral JE, Rodríguez Jiménez B, Velasco Sánchez E, et al. Essure and chronic pelvic pain: a population-based cohort. J Obstet Gynaecol. 2014;34:712-713. doi:10.3109/01443615.2014.92075.
  7. Clark NV, Rademaker D, Mushinski AA, et al. Essure removal for the treatment of device-attributed symptoms: an expanded case series and follow-up survey. J Minim Invasive Gynecol. 2017;24:971-976. doi:10.1016/j.jmig.2017.05.015.
  8. Sills ES, Rickers NS, Li X. Surgical management after hysteroscopic sterilization: minimally invasive approach incorporating intraoperative fluoroscopy for symptomatic patients with >2 Essure devices. Surg Technol Int. 2018;32:156-161.
  9. Administration USF and D. 522 Postmarket Surveillance Studies. Center for Devices and Radiological Health; 2020.
  10. Kamencic H, Thiel L, Karreman E, et al. Does Essure cause significant de novo pain? A retrospective review of indications for second surgeries after Essure placement. J Minim Invasive Gynecol. 2016;23:1158-1162. doi:10.1016/j.jmig.2016.08.823.
  11. Yunker AC, Ritch JM, Robinson EF, et al. Incidence and risk factors for chronic pelvic pain after hysteroscopic sterilization. J Minim Invasive Gynecol. 2015;22:390-994. doi:10.1016/j.jmig.2014.06.007.
  12. Phillips K, Clauw DJ. Central pain mechanisms in chronic pain states--maybe it is all in their head. Best Pract Res Clin Rheumatol. 2011;25:141-154. doi:10.1016/j.berh.2011.02.005.
  13. van Limburg Stirum EVJ, Clark NV, Lindsey A, et al. Factors associated with negative patient experiences with Essure sterilization. JSLS. 2020;24(1):e2019.00065. doi:10.4293/JSLS.2019.00065.
  14. Brito LG, Cohen SL, Goggins ER, et al. Essure surgical removal and subsequent symptom resolution: case series and follow-up survey. J Minim Invasive Gynecol. 2015;22:910-913. doi:10.1016/j.jmig.2015.03.018.
  15. Maassen LW, van Gastel DM, Haveman I, et al. Removal of Essure sterilization devices: a retrospective cohort study in the Netherlands. J Minim Invasive Gynecol. 2019;26:1056-1062. doi:10.1016/j.jmig.2018.10.009.
  16. Sills ES, Palermo GD. Surgical excision of Essure devices with ESHRE class IIb uterine malformation: sequential hysteroscopic-laparoscopic approach to the septate uterus. Facts Views Vis Obgyn. 2016;8:49-52.
  17. Ricci G, Restaino S, Di Lorenzo G, et al. Risk of Essure microinsert abdominal migration: case report and review of literature. Ther Clin Risk Manag. 2014;10:963-968. doi:10.2147/TCRM.S65634.
  18. Borley J, Shabajee N, Tan TL. A kink is not always a perforation: assessing Essure hysteroscopic sterilization placement. Fertil Steril. 2011;95:2429.e15-7. doi:10.1016/j.fertnstert.2011.02.006.
  19. Djeffal H, Blouet M, Pizzoferato AC, et al. Imaging findings in Essure-related complications: a pictorial review.7Br J Radiol. 2018;91(1090):20170686. doi:10.1259/bjr.20170686.
  20. Lora Alcantara I, Rezai S, Kirby C, et al. Essure surgical removal and subsequent resolution of chronic pelvic pain: a case report and review of the literature. Case Rep Obstet Gynecol. 2016;2016:6961202. doi:10.1155/2016/6961202.
  21. Mahmoud MS, Fridman D, Merhi ZO. Subserosal misplacement of Essure device manifested by late-onset acute pelvic pain. Fertil Steril. 2009;92:2038.e1-3. doi:10.1016/j.fertnstert.2009.07.1677.
  22. Tissot M, Petry S, Lecointre L, et al. Two surgical techniques for Essure device ablation: the hysteroscopic way and the laparoscopic way by salpingectomy with tubal interstitial resection. J Minim Invasive Gynecol. 2019;26(4):603. doi:10.1016/j.jmig.2018.07.017.
  23. Chene G, Cerruto E, Moret S, et al. Quality of life after laparoscopic removal of Essure sterilization devices. Eur J Obstet Gynecol Reprod Biol X. 2019;3:100054. doi:10.1016/j.eurox.2019.100054.
  24. Thiel L, Rattray D, Thiel J. Laparoscopic cornuectomy as a technique for removal of Essure microinserts. J Minim Invasive Gynecol. 2017;24(1):10. doi:10.1016/j.jmig.2016.07.004.
  25. Charavil A, Agostini A, Rambeaud C, et al. Vaginal hysterectomy with salpingectomy for Essure insert removal. J Minim Invasive Gynecol. 2019;2:695-701. doi:10.1016/j.jmig.2018.07.019.
  26. Howard DL, Christenson PJ, Strickland JL. Use of intraoperative fluoroscopy during laparotomy to identify fragments of retained Essure microinserts: case report. J Minim Invasive Gynecol. 2012;19:667-670. doi:10.1016/j.jmig.2012.04.007.
  27. Miquel L, Crochet P, Francini S, et al. Laparoscopic Essure device removal by en bloc salpingectomy-cornuectomy with intraoperative x-ray checking: a retrospective cohort study. J Minim Invasive Gynecol. 2020;27:697-703. doi:10.1016/j. jmig.2019.06.006. 
References

 

  1. Connor VF. Essure: a review six years later. J Minim Invasive Gynecol. 2009;16:282-290. doi:10.1016/j.jmig.2009.02.009.
  2. Casey J, Aguirre F, Yunker A. Outcomes of laparoscopic removal of the Essure sterilization device for pelvic pain: a case series. Contraception. 2016;94:190-192. doi:10.1016/j.contraception.2016.03.017.
  3. Jackson I. Essure device removed entirely from market, with 99% of unused birth control implants retrieved: FDA. AboutLawsuits.com. January 13, 2020. https://www.aboutlawsuits.com/Essure-removal-update-166509. Accessed June 7, 2022.
  4. US Food and Drug Administration. Labeling for permanent hysteroscopically-placed tubal implants intended for sterilization. October 31, 2016. https://www.fda.gov/media/96315/download. Accessed June 7, 2022.
  5. US Food and Drug Administration. FDA activities related to Essure. March 14, 2022. https://www.fda.gov/medical-devices/essure-permanent-birth-control/fda-activities-related-essure. Accessed June 8, 2022.
  6. Arjona Berral JE, Rodríguez Jiménez B, Velasco Sánchez E, et al. Essure and chronic pelvic pain: a population-based cohort. J Obstet Gynaecol. 2014;34:712-713. doi:10.3109/01443615.2014.92075.
  7. Clark NV, Rademaker D, Mushinski AA, et al. Essure removal for the treatment of device-attributed symptoms: an expanded case series and follow-up survey. J Minim Invasive Gynecol. 2017;24:971-976. doi:10.1016/j.jmig.2017.05.015.
  8. Sills ES, Rickers NS, Li X. Surgical management after hysteroscopic sterilization: minimally invasive approach incorporating intraoperative fluoroscopy for symptomatic patients with >2 Essure devices. Surg Technol Int. 2018;32:156-161.
  9. Administration USF and D. 522 Postmarket Surveillance Studies. Center for Devices and Radiological Health; 2020.
  10. Kamencic H, Thiel L, Karreman E, et al. Does Essure cause significant de novo pain? A retrospective review of indications for second surgeries after Essure placement. J Minim Invasive Gynecol. 2016;23:1158-1162. doi:10.1016/j.jmig.2016.08.823.
  11. Yunker AC, Ritch JM, Robinson EF, et al. Incidence and risk factors for chronic pelvic pain after hysteroscopic sterilization. J Minim Invasive Gynecol. 2015;22:390-994. doi:10.1016/j.jmig.2014.06.007.
  12. Phillips K, Clauw DJ. Central pain mechanisms in chronic pain states--maybe it is all in their head. Best Pract Res Clin Rheumatol. 2011;25:141-154. doi:10.1016/j.berh.2011.02.005.
  13. van Limburg Stirum EVJ, Clark NV, Lindsey A, et al. Factors associated with negative patient experiences with Essure sterilization. JSLS. 2020;24(1):e2019.00065. doi:10.4293/JSLS.2019.00065.
  14. Brito LG, Cohen SL, Goggins ER, et al. Essure surgical removal and subsequent symptom resolution: case series and follow-up survey. J Minim Invasive Gynecol. 2015;22:910-913. doi:10.1016/j.jmig.2015.03.018.
  15. Maassen LW, van Gastel DM, Haveman I, et al. Removal of Essure sterilization devices: a retrospective cohort study in the Netherlands. J Minim Invasive Gynecol. 2019;26:1056-1062. doi:10.1016/j.jmig.2018.10.009.
  16. Sills ES, Palermo GD. Surgical excision of Essure devices with ESHRE class IIb uterine malformation: sequential hysteroscopic-laparoscopic approach to the septate uterus. Facts Views Vis Obgyn. 2016;8:49-52.
  17. Ricci G, Restaino S, Di Lorenzo G, et al. Risk of Essure microinsert abdominal migration: case report and review of literature. Ther Clin Risk Manag. 2014;10:963-968. doi:10.2147/TCRM.S65634.
  18. Borley J, Shabajee N, Tan TL. A kink is not always a perforation: assessing Essure hysteroscopic sterilization placement. Fertil Steril. 2011;95:2429.e15-7. doi:10.1016/j.fertnstert.2011.02.006.
  19. Djeffal H, Blouet M, Pizzoferato AC, et al. Imaging findings in Essure-related complications: a pictorial review.7Br J Radiol. 2018;91(1090):20170686. doi:10.1259/bjr.20170686.
  20. Lora Alcantara I, Rezai S, Kirby C, et al. Essure surgical removal and subsequent resolution of chronic pelvic pain: a case report and review of the literature. Case Rep Obstet Gynecol. 2016;2016:6961202. doi:10.1155/2016/6961202.
  21. Mahmoud MS, Fridman D, Merhi ZO. Subserosal misplacement of Essure device manifested by late-onset acute pelvic pain. Fertil Steril. 2009;92:2038.e1-3. doi:10.1016/j.fertnstert.2009.07.1677.
  22. Tissot M, Petry S, Lecointre L, et al. Two surgical techniques for Essure device ablation: the hysteroscopic way and the laparoscopic way by salpingectomy with tubal interstitial resection. J Minim Invasive Gynecol. 2019;26(4):603. doi:10.1016/j.jmig.2018.07.017.
  23. Chene G, Cerruto E, Moret S, et al. Quality of life after laparoscopic removal of Essure sterilization devices. Eur J Obstet Gynecol Reprod Biol X. 2019;3:100054. doi:10.1016/j.eurox.2019.100054.
  24. Thiel L, Rattray D, Thiel J. Laparoscopic cornuectomy as a technique for removal of Essure microinserts. J Minim Invasive Gynecol. 2017;24(1):10. doi:10.1016/j.jmig.2016.07.004.
  25. Charavil A, Agostini A, Rambeaud C, et al. Vaginal hysterectomy with salpingectomy for Essure insert removal. J Minim Invasive Gynecol. 2019;2:695-701. doi:10.1016/j.jmig.2018.07.019.
  26. Howard DL, Christenson PJ, Strickland JL. Use of intraoperative fluoroscopy during laparotomy to identify fragments of retained Essure microinserts: case report. J Minim Invasive Gynecol. 2012;19:667-670. doi:10.1016/j.jmig.2012.04.007.
  27. Miquel L, Crochet P, Francini S, et al. Laparoscopic Essure device removal by en bloc salpingectomy-cornuectomy with intraoperative x-ray checking: a retrospective cohort study. J Minim Invasive Gynecol. 2020;27:697-703. doi:10.1016/j. jmig.2019.06.006. 
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Misoprostol: Clinical pharmacology in obstetrics and gynecology

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Oxytocin and prostaglandins are critically important regulators of uterine contraction. Obstetrician-gynecologists commonly prescribe oxytocin and prostaglandin agonists (misoprostol, dinoprostone) to stimulate uterine contraction for the induction of labor, prevention and treatment of postpartum hemorrhage, and treatment of miscarriage and fetal demise. The focus of this editorial is the clinical pharmacology of misoprostol.

Misoprostol is approved by the US Food and Drug Administration (FDA) for the prevention and treatment of nonsteroidal anti-inflammatory drug–induced gastric ulcers and for patients at high risk for gastric ulcers, including those with a history of gastric ulcers. The approved misoprostol route and dose for this indication is oral administration of 200 µg four times daily with food.1 Recent food intake and antacid use reduces the absorption of orally administered misoprostol. There are no FDA-approved indications for the use of misoprostol as a single agent in obstetrics and gynecology. The FDA has approved the combination of mifepristone and misoprostol for medication abortion in the first trimester. In contrast to misoprostol, PGE2 (dinoprostone) is approved by the FDA as a vaginal insert containing 10 mg of dinoprostone for the initiation and/or continuation of cervical ripening in patients at or near term in whom there is a medical or obstetric indication for induction of labor (Cervidil; Ferring Pharmaceuticals Inc, Parsippany, New Jersey).2

Pharmacology of misoprostol

Misoprostol is a prostaglandin E1 (PGE1) agonist analogue. Prostaglandin E1 (alprostadil) is rapidly metabolized, has a half-life in the range of minutes and is not orally active, requiring administration by intravenous infusion or injection. It is indicated to maintain a patent ductus arteriosus in newborns with ductal-dependent circulation and to treat erectile dysfunction.3 In contrast to PGE1, misoprostol has a methyl ester group at carbon-1 (C-1) that increases potency and duration of action. Misoprostol also has no hydroxyl group at C-15, replacing that moiety with the addition of both a methyl- and hydroxyl- group at C-16 (FIGURE). These molecular changes improve oral activity and increase duration of action.4 Pure misoprostol is a viscous oil. It is formulated into tables by dispersing the oil on hydroxypropyl methyl cellulose before compounding into tablets. Unlike naturally occurring prostaglandins (PGE1), misoprostol tablets are stabile at room temperature for years.4

 

Following absorption, the methyl ester at C-1 is enzymatically cleaved, yielding misoprostol acid, the active drug.4 Misoprostol binds to the E prostanoid receptor 3 (EP-3).5 Activation of myometrial EP-3 receptor induces an increase in intracellular phosphoinositol turnover and calcium mobilization, resulting in an increase in intracellular-free calcium, triggering actin-myosin contractility.6 The increase in free calcium is propagated cell-to-cell through gap junctions that link the myometrial cells to facilitate the generation of a coordinated contraction.

Misoprostol: Various routes of administration are not equal

Misoprostol can be given by an oral, buccal, vaginal, or rectal route of administration. To study the effect of the route of administration on uterine tone and contractility, investigators randomly assigned patients at 8 to 11 weeks’ gestation to receive misoprostol 400 µg as a single dose by the oral or vaginal route. Uterine tone and contractility were measured using an intrauterine pressure transducer. Compared to vaginal administration, oral administration of misprostol was associated with rapid attainment of peak plasma level at 30 minutes, followed by a decline in concentration by 60 minutes. This rapid onset and rapid offset of plasma concentration was paralleled by the onset of uterine tone within 8 minutes, but surprisingly no sustained uterine contractions.7 By contrast, following vaginal administration of misoprostol, serum levels rose slowly and peaked in 1 to 2 hours. Uterine tone increased within 21 minutes, and sustained uterine contractions were recorded for 4 hours.7 The rapid rise and fall in plasma misoprostol following oral administration and the more sustained plasma misoprostol concentration over 4 hours has been previously reported.8 In a second study involving patients 8 to 11 weeks’ gestation, the effect of a single dose of misoprostol 400 µg by an oral or vaginal route on uterine contractility was compared using an intrauterine pressure transducer.9 Confirming previous results, the time from misoprostol administration to increased uterine tone was more rapid with oral than with vaginal administration (8 min vs 19 min). Over the course of 4 hours, uterine contraction activity was greater with vaginal than with oral administration (454 vs 166 Montevideo units).9

Both studies reported that oral administration of misoprostol resulted in more rapid onset and offset of action than vaginal administration. Oral administration of a single dose of misoprostol 400 µg did not result in sustained uterine contractions in most patients in the first trimester. Vaginal administration produced a slower onset of increased uterine tone but sustained uterine contractions over 4 hours. Compared with vaginal administration of misoprostol, the rapid onset and offset of action of oral misoprostol may reduce the rate of tachysystole and changes in fetal heart rate observed with vaginal administration.10

An important finding is that buccal and vaginal administration of misoprostol have similar effects on uterine tone in the first trimester.11 To study the effect of buccal and vaginal administration of misoprostol on uterine tone, patients 6 to 13 weeks’ gestation were randomly allocated to receive a single dose of misoprostol 400 µg by a buccal or vaginal route.11 Uterine activity over 5 hours following administration was assessed using an intrauterine pressure transducer. Uterine tone 20 to 30 minutes after buccal or vaginal administration of misoprostol (400 µg) was 27 and 28 mm Hg, respectively. Peak uterine tone, as measured by an intrauterine pressure transducer, for buccal and vaginal administration of misoprostol was 49 mm Hg and 54 mm Hg, respectively. Total Alexandria units (AU) over 5 hours following buccal or vaginal administration was 6,537 AU and 6,090 AU, respectively.11

An AU is calculated as the average amplitude of the contractions (mm Hg) multiplied by the average duration of the contractions (min) multiplied by average frequency of contraction over 10 minutes.12 By contrast, a Montevideo unit does not include an assessment of contraction duration and is calculated as average amplitude of contractions (mm Hg) multiplied by frequency of uterine contractions over 10 minutes.12

In contrast to buccal or vaginal administration, rectal administration of misoprostol resulted in much lower peak uterine tone and contractility as measured by a pressure transducer. Uterine tone 20 to 30 minutes after vaginal and rectal administration of misoprostol (400 µg) was 28 and 19 mm Hg, respectively.11 Peak uterine tone, as measured by an intrauterine pressure transducer, for vaginal and rectal administration of misoprostol was 54 and 31 mm Hg, respectively. AUs over 5 hours following vaginal and rectal administration was 6,090 AU and 2,768 AU, respectively.11 Compared with buccal and vaginal administration of misoprostol, rectal administration produced less sustained uterine contractions in the first trimester of pregnancy. To achieve maximal sustained uterine contractions, buccal and vaginal routes of administration are superior to oral and rectal administration.

Continue to: Misoprostol and cervical ripening...

 

 

Misoprostol and cervical ripening

Misoprostol is commonly used to soften and ripen the cervix. Some of the cervical ripening effects of misoprostol are likely due to increased uterine tone. In addition, misoprostol may have a direct effect on the collagen structure of the cervix. To study the effect of misoprostol on the cervix, pregnant patients in the first trimester were randomly assigned to receive misoprostol 200 µg by vaginal self-administration, isosorbide mononitrate (IMN) 40 mg by vaginal self-administration or no treatment the evening prior to pregnancy termination.13 The following day, before uterine evacuation, a cervical biopsy was obtained for electron microscopy studies and immunohistochemistry to assess the presence of enzymes involved in collagen degradation, including matrix metalloproteinase 1 (MMP-1) and matrix metalloproteinase 9 (MMP-9). Electron microscopy demonstrated that pretreatment with misoprostol resulted in a pronounced splitting and disorganization of collagen fibers.13 Compared with misoprostol treatment, IMN produced less splitting and disorganization of collagen fibers, and in the no treatment group, no marked changes in the collagen framework were observed.

Compared with no treatment, misoprostol and IMN pretreatment were associated with marked increases in MMP-1 and MMP-9 as assessed by immunohistochemistry. Misoprostol pretreatment also resulted in a significant increase in interleukin-8 concentration compared with IMN pretreatment and no treatment (8.8 vs 2.7 vs 2.4 pg/mg tissue), respectively.13 Other investigators have also reported that misoprostol increased cervical leukocyte influx and collagen disrupting enzymes MMP-8 and MMP-9.14,15

An open-label clinical trial compared the efficacy of misoprostol versus Foley catheter for labor induction at term in 1,859 patients ≥ 37 weeks’ gestation with a Bishop score <6.16 Patients were randomly allocated to misoprostol (50 µg orally every 4 hours up to 3 times in 24 hours) versus placement of a 16 F or 18 F Foley catheter introduced through the cervix, filled with 30 mL of sodium chloride or water. The investigators reported that oral misoprostol and Foley catheter cervical ripening had similar safety and effectiveness for cervical ripening as a prelude to induction of labor, including no statistically significant differences in 5-minute Apgar score <7, umbilical cord artery pH ≤ 7.05, postpartum hemorrhage, or cesarean birth rate.16

Bottom line

Misoprostol and oxytocin are commonly prescribed in obstetric practice for cervical ripening and induction of labor, respectively. The dose and route of administration of misoprostol influences the effect on the uterus. For cervical ripening, where rapid onset and offset may help to reduce the risk of uterine tachysystole and worrisome fetal heart rate changes, low-dose (50 µg) oral administration of misoprostol may be a preferred dose and route. For the treatment of miscarriage and fetal demise, to stimulate sustained uterine contractions over many hours, buccal and vaginal administration of misoprostol are preferred. Rectal administration is generally inferior to buccal and vaginal administration for stimulating sustained uterine contractions and its uses should be limited. ●

 
Misoprostol and pyrexia

Common side effects of misoprostol are abdominal cramping, diarrhea, nausea, vomiting, headache, and fever. Elevated temperature following misoprostol administration is a concerning side effect that may require further investigation to rule out an infection, especially if the elevated temperature persists for > 4 hours. The preoptic area of the anterior hypothalamus (POAH) plays a major role in thermoregulation. When an infection causes an increase in endogenous pyrogens, including interleukin-1β, interleukin-6 and tumor necrosis factor, prostaglandins are generated in the region of the POAH, increasing the thermoregulatory set point, triggering cutaneous vasoconstriction and shivering and non-shivering thermogenesis.1 Misoprostol, especially at doses >400 µg commonly causes both patient-reported chills and temperature elevation >38° C.

In a study comparing misoprostol and oxytocin for the management of the third stage of labor, 597 patients were randomly allocated to receive oxytocin 10 units by intramuscular injection or misoprostol 400 µg or 600 µg by the oral route.2 Patient-reported shivering occurred in 13%, 19%, and 28% of patients receiving oxytocin, misoprostol 400 µg and misoprostol 800 µg, respectively. A recorded temperature >38° C occurred within 1 hour of medication administration in approximately 3%, 2%, and 7.5% of patients receiving oxytocin, misoprostol 400 µg, and misoprostol 800 µg, respectively. In another study, 453 patients scheduled for a cesarean birth were randomly allocated to receive 1 of 3 doses of rectal misoprostol 200 μg, 400 μg, or 600 μg before incision. Fever was detected in 2.6%, 9.9%, and 5.1% of the patients receiving misoprostol 200 μg, 400 μg, or 600 μg, respectively.3

References

1. Aronoff DM, Neilson EG. Antipyretics: mechanisms of action and clinical use in fever suppression. Am J Med. 2001;111:304-315. doi: 10.1016/s0002-9343(01)00834-8.

2. Lumbiganon P, Hofmeyr J, Gumezoglu AM, et al. Misoprostol dose-related shivering and pyrexia in the third stage of labor. WHO Collaborative Trial of Misoprostol in the Management of the Third Stage of Labor. Br J Obstet Gynaecol. 1999;106:304-308. doi: 10.1111/j.1471-0528.1999.tb08266.x.

3. Sweed M, El-Said M, Abou-Gamrah AA, et al. Comparison between 200, 400 and 600 microgram rectal misoprostol before cesarean section: a randomized clinical trial. J Obstet Gynaecol Res. 2019;45:585-591. doi: 10.1111 /jog.13883.

 

References

 

  1. Cytotec [package insert]. Chicago, IL: GD Searle & Co. https://www.accessdata.fda.gov/drugsatfda_docs/label/2002/19268slr037.pdf. Accessed June 20, 2022.
  2. Cervidil [package insert]. St Louis, MO: Forrest Pharmaceuticals Inc.; May 2006. Accessed June 20, 2022.
  3. Caverject [package insert]. New York, NY: Pfizer Inc.; March 2014. Accessed June 20, 2022.
  4. Collins PW. Misoprostol: discovery, development and clinical applications. Med Res Rev. 1990;10:149-172. doi: 10.1002/med.2610100202.
  5. Audit M, White KI, Breton B, et al. Crystal structure of misoprostol bound to the labor inducer prostaglandin E2 receptor. Nat Chem Biol. 2019;15:11-17. doi: 10.1038/s41589-018-0160-y.
  6. Pallliser KH, Hirst JJ, Ooi G, et al. Prostaglandin E and F receptor expression and myometrial sensitivity in labor onset in the sheep. Biol Reprod. 2005;72:937-943. doi: 10.1095/biolreprod.104.035311.
  7. Gemzell-Danilesson K, Marions L, Rodriguez A, et al. Comparison between oral and vaginal administration of misoprostol on uterine contractility. Obstet Gynecol. 1999;93:275-280. doi: 10.1016/s0029-7844(98)00436-0.
  8. Zieman M, Fong SK, Benowitz NL, et al. Absorption kinetics of misoprostol with oral or vaginal administration. Obstet Gynecol. 1997;90:88-92. doi: 10.1016/S0029-7844(97)00111-7.
  9. Aronsson A, Bygdeman M, Gemzell-Danielsson K. Effects of misoprostol on uterine contractility following different routes of administration. Hum Reprod. 2004;19:81-84. doi: 10.1093/humrep/deh005.
  10. Young DC, Delaney T, Armson BA, et al. Oral misoprostol, low dose vaginal misoprostol and vaginal dinoprostone for labor induction: randomized controlled trial. PLOS One. 2020;15:e0227245. doi: 10.1371/journal.pone.0227245.
  11. Meckstroth KR, Whitaker AK, Bertisch S, et al. Misoprostol administered by epithelial routes. Drug absorption and uterine response. Obstet Gynecol. 2006;108:582-590. doi: 10.1097/01.AOG.0000230398.32794.9d.
  12. el-Sahwi S, Gaafar AA, Toppozada HK. A new unit for evaluation of uterine activity. Am J Obstet Gynecol. 1967;98:900-903. doi: 10.1016/0002-9378(67)90074-9.
  13. Vukas N, Ekerhovd E, Abrahamsson G, et al. Cervical priming in the first trimester: morphological and biochemical effects of misoprostol and isosorbide mononitrate. Acta Obstet Gyecol. 2009;88:43-51. doi: 10.1080/00016340802585440.
  14. Aronsson A, Ulfgren AK, Stabi B, et al. The effect of orally and vaginally administered misoprostol on inflammatory mediators and cervical ripening during early pregnancy. Contraception. 2005;72:33-39. doi: 10.1016/j.contraception.2005.02.012.
  15. Denison FC, Riley SC, Elliott CL, et al. The effect of mifepristone administration on leukocyte populations, matrix metalloproteinases and inflammatory mediators in the first trimester cervix. Mol Hum Reprod. 2000;6:541-548. doi: 10.1093/molehr/6.6.541.
  16. ten Eikelder MLG, Rengerink KO, Jozwiak M, et al. Induction of labour at term with oral misoprostol versus a Foley catheter (PROBAAT-II):  a multicentre randomised controlled non-inferiority trial. Lancet. 2016;387:1619-1628. doi: 10.1016 /S0140-6736(16)00084-2.
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Brigham and Women’s Hospital 
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Gynecology and Reproductive Biology 
Harvard Medical School 
Boston, Massachusetts

Dr. Barbieri reports no financial relationships relevant to this article.

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Brigham and Women’s Hospital 
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Gynecology and Reproductive Biology 
Harvard Medical School 
Boston, Massachusetts

Dr. Barbieri reports no financial relationships relevant to this article.

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Editor in Chief, OBG Management 
Chair Emeritus, Department of Obstetrics and Gynecology 
Brigham and Women’s Hospital 
Kate Macy Ladd Distinguished Professor of Obstetrics,     
Gynecology and Reproductive Biology 
Harvard Medical School 
Boston, Massachusetts

Dr. Barbieri reports no financial relationships relevant to this article.

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Oxytocin and prostaglandins are critically important regulators of uterine contraction. Obstetrician-gynecologists commonly prescribe oxytocin and prostaglandin agonists (misoprostol, dinoprostone) to stimulate uterine contraction for the induction of labor, prevention and treatment of postpartum hemorrhage, and treatment of miscarriage and fetal demise. The focus of this editorial is the clinical pharmacology of misoprostol.

Misoprostol is approved by the US Food and Drug Administration (FDA) for the prevention and treatment of nonsteroidal anti-inflammatory drug–induced gastric ulcers and for patients at high risk for gastric ulcers, including those with a history of gastric ulcers. The approved misoprostol route and dose for this indication is oral administration of 200 µg four times daily with food.1 Recent food intake and antacid use reduces the absorption of orally administered misoprostol. There are no FDA-approved indications for the use of misoprostol as a single agent in obstetrics and gynecology. The FDA has approved the combination of mifepristone and misoprostol for medication abortion in the first trimester. In contrast to misoprostol, PGE2 (dinoprostone) is approved by the FDA as a vaginal insert containing 10 mg of dinoprostone for the initiation and/or continuation of cervical ripening in patients at or near term in whom there is a medical or obstetric indication for induction of labor (Cervidil; Ferring Pharmaceuticals Inc, Parsippany, New Jersey).2

Pharmacology of misoprostol

Misoprostol is a prostaglandin E1 (PGE1) agonist analogue. Prostaglandin E1 (alprostadil) is rapidly metabolized, has a half-life in the range of minutes and is not orally active, requiring administration by intravenous infusion or injection. It is indicated to maintain a patent ductus arteriosus in newborns with ductal-dependent circulation and to treat erectile dysfunction.3 In contrast to PGE1, misoprostol has a methyl ester group at carbon-1 (C-1) that increases potency and duration of action. Misoprostol also has no hydroxyl group at C-15, replacing that moiety with the addition of both a methyl- and hydroxyl- group at C-16 (FIGURE). These molecular changes improve oral activity and increase duration of action.4 Pure misoprostol is a viscous oil. It is formulated into tables by dispersing the oil on hydroxypropyl methyl cellulose before compounding into tablets. Unlike naturally occurring prostaglandins (PGE1), misoprostol tablets are stabile at room temperature for years.4

 

Following absorption, the methyl ester at C-1 is enzymatically cleaved, yielding misoprostol acid, the active drug.4 Misoprostol binds to the E prostanoid receptor 3 (EP-3).5 Activation of myometrial EP-3 receptor induces an increase in intracellular phosphoinositol turnover and calcium mobilization, resulting in an increase in intracellular-free calcium, triggering actin-myosin contractility.6 The increase in free calcium is propagated cell-to-cell through gap junctions that link the myometrial cells to facilitate the generation of a coordinated contraction.

Misoprostol: Various routes of administration are not equal

Misoprostol can be given by an oral, buccal, vaginal, or rectal route of administration. To study the effect of the route of administration on uterine tone and contractility, investigators randomly assigned patients at 8 to 11 weeks’ gestation to receive misoprostol 400 µg as a single dose by the oral or vaginal route. Uterine tone and contractility were measured using an intrauterine pressure transducer. Compared to vaginal administration, oral administration of misprostol was associated with rapid attainment of peak plasma level at 30 minutes, followed by a decline in concentration by 60 minutes. This rapid onset and rapid offset of plasma concentration was paralleled by the onset of uterine tone within 8 minutes, but surprisingly no sustained uterine contractions.7 By contrast, following vaginal administration of misoprostol, serum levels rose slowly and peaked in 1 to 2 hours. Uterine tone increased within 21 minutes, and sustained uterine contractions were recorded for 4 hours.7 The rapid rise and fall in plasma misoprostol following oral administration and the more sustained plasma misoprostol concentration over 4 hours has been previously reported.8 In a second study involving patients 8 to 11 weeks’ gestation, the effect of a single dose of misoprostol 400 µg by an oral or vaginal route on uterine contractility was compared using an intrauterine pressure transducer.9 Confirming previous results, the time from misoprostol administration to increased uterine tone was more rapid with oral than with vaginal administration (8 min vs 19 min). Over the course of 4 hours, uterine contraction activity was greater with vaginal than with oral administration (454 vs 166 Montevideo units).9

Both studies reported that oral administration of misoprostol resulted in more rapid onset and offset of action than vaginal administration. Oral administration of a single dose of misoprostol 400 µg did not result in sustained uterine contractions in most patients in the first trimester. Vaginal administration produced a slower onset of increased uterine tone but sustained uterine contractions over 4 hours. Compared with vaginal administration of misoprostol, the rapid onset and offset of action of oral misoprostol may reduce the rate of tachysystole and changes in fetal heart rate observed with vaginal administration.10

An important finding is that buccal and vaginal administration of misoprostol have similar effects on uterine tone in the first trimester.11 To study the effect of buccal and vaginal administration of misoprostol on uterine tone, patients 6 to 13 weeks’ gestation were randomly allocated to receive a single dose of misoprostol 400 µg by a buccal or vaginal route.11 Uterine activity over 5 hours following administration was assessed using an intrauterine pressure transducer. Uterine tone 20 to 30 minutes after buccal or vaginal administration of misoprostol (400 µg) was 27 and 28 mm Hg, respectively. Peak uterine tone, as measured by an intrauterine pressure transducer, for buccal and vaginal administration of misoprostol was 49 mm Hg and 54 mm Hg, respectively. Total Alexandria units (AU) over 5 hours following buccal or vaginal administration was 6,537 AU and 6,090 AU, respectively.11

An AU is calculated as the average amplitude of the contractions (mm Hg) multiplied by the average duration of the contractions (min) multiplied by average frequency of contraction over 10 minutes.12 By contrast, a Montevideo unit does not include an assessment of contraction duration and is calculated as average amplitude of contractions (mm Hg) multiplied by frequency of uterine contractions over 10 minutes.12

In contrast to buccal or vaginal administration, rectal administration of misoprostol resulted in much lower peak uterine tone and contractility as measured by a pressure transducer. Uterine tone 20 to 30 minutes after vaginal and rectal administration of misoprostol (400 µg) was 28 and 19 mm Hg, respectively.11 Peak uterine tone, as measured by an intrauterine pressure transducer, for vaginal and rectal administration of misoprostol was 54 and 31 mm Hg, respectively. AUs over 5 hours following vaginal and rectal administration was 6,090 AU and 2,768 AU, respectively.11 Compared with buccal and vaginal administration of misoprostol, rectal administration produced less sustained uterine contractions in the first trimester of pregnancy. To achieve maximal sustained uterine contractions, buccal and vaginal routes of administration are superior to oral and rectal administration.

Continue to: Misoprostol and cervical ripening...

 

 

Misoprostol and cervical ripening

Misoprostol is commonly used to soften and ripen the cervix. Some of the cervical ripening effects of misoprostol are likely due to increased uterine tone. In addition, misoprostol may have a direct effect on the collagen structure of the cervix. To study the effect of misoprostol on the cervix, pregnant patients in the first trimester were randomly assigned to receive misoprostol 200 µg by vaginal self-administration, isosorbide mononitrate (IMN) 40 mg by vaginal self-administration or no treatment the evening prior to pregnancy termination.13 The following day, before uterine evacuation, a cervical biopsy was obtained for electron microscopy studies and immunohistochemistry to assess the presence of enzymes involved in collagen degradation, including matrix metalloproteinase 1 (MMP-1) and matrix metalloproteinase 9 (MMP-9). Electron microscopy demonstrated that pretreatment with misoprostol resulted in a pronounced splitting and disorganization of collagen fibers.13 Compared with misoprostol treatment, IMN produced less splitting and disorganization of collagen fibers, and in the no treatment group, no marked changes in the collagen framework were observed.

Compared with no treatment, misoprostol and IMN pretreatment were associated with marked increases in MMP-1 and MMP-9 as assessed by immunohistochemistry. Misoprostol pretreatment also resulted in a significant increase in interleukin-8 concentration compared with IMN pretreatment and no treatment (8.8 vs 2.7 vs 2.4 pg/mg tissue), respectively.13 Other investigators have also reported that misoprostol increased cervical leukocyte influx and collagen disrupting enzymes MMP-8 and MMP-9.14,15

An open-label clinical trial compared the efficacy of misoprostol versus Foley catheter for labor induction at term in 1,859 patients ≥ 37 weeks’ gestation with a Bishop score <6.16 Patients were randomly allocated to misoprostol (50 µg orally every 4 hours up to 3 times in 24 hours) versus placement of a 16 F or 18 F Foley catheter introduced through the cervix, filled with 30 mL of sodium chloride or water. The investigators reported that oral misoprostol and Foley catheter cervical ripening had similar safety and effectiveness for cervical ripening as a prelude to induction of labor, including no statistically significant differences in 5-minute Apgar score <7, umbilical cord artery pH ≤ 7.05, postpartum hemorrhage, or cesarean birth rate.16

Bottom line

Misoprostol and oxytocin are commonly prescribed in obstetric practice for cervical ripening and induction of labor, respectively. The dose and route of administration of misoprostol influences the effect on the uterus. For cervical ripening, where rapid onset and offset may help to reduce the risk of uterine tachysystole and worrisome fetal heart rate changes, low-dose (50 µg) oral administration of misoprostol may be a preferred dose and route. For the treatment of miscarriage and fetal demise, to stimulate sustained uterine contractions over many hours, buccal and vaginal administration of misoprostol are preferred. Rectal administration is generally inferior to buccal and vaginal administration for stimulating sustained uterine contractions and its uses should be limited. ●

 
Misoprostol and pyrexia

Common side effects of misoprostol are abdominal cramping, diarrhea, nausea, vomiting, headache, and fever. Elevated temperature following misoprostol administration is a concerning side effect that may require further investigation to rule out an infection, especially if the elevated temperature persists for > 4 hours. The preoptic area of the anterior hypothalamus (POAH) plays a major role in thermoregulation. When an infection causes an increase in endogenous pyrogens, including interleukin-1β, interleukin-6 and tumor necrosis factor, prostaglandins are generated in the region of the POAH, increasing the thermoregulatory set point, triggering cutaneous vasoconstriction and shivering and non-shivering thermogenesis.1 Misoprostol, especially at doses >400 µg commonly causes both patient-reported chills and temperature elevation >38° C.

In a study comparing misoprostol and oxytocin for the management of the third stage of labor, 597 patients were randomly allocated to receive oxytocin 10 units by intramuscular injection or misoprostol 400 µg or 600 µg by the oral route.2 Patient-reported shivering occurred in 13%, 19%, and 28% of patients receiving oxytocin, misoprostol 400 µg and misoprostol 800 µg, respectively. A recorded temperature >38° C occurred within 1 hour of medication administration in approximately 3%, 2%, and 7.5% of patients receiving oxytocin, misoprostol 400 µg, and misoprostol 800 µg, respectively. In another study, 453 patients scheduled for a cesarean birth were randomly allocated to receive 1 of 3 doses of rectal misoprostol 200 μg, 400 μg, or 600 μg before incision. Fever was detected in 2.6%, 9.9%, and 5.1% of the patients receiving misoprostol 200 μg, 400 μg, or 600 μg, respectively.3

References

1. Aronoff DM, Neilson EG. Antipyretics: mechanisms of action and clinical use in fever suppression. Am J Med. 2001;111:304-315. doi: 10.1016/s0002-9343(01)00834-8.

2. Lumbiganon P, Hofmeyr J, Gumezoglu AM, et al. Misoprostol dose-related shivering and pyrexia in the third stage of labor. WHO Collaborative Trial of Misoprostol in the Management of the Third Stage of Labor. Br J Obstet Gynaecol. 1999;106:304-308. doi: 10.1111/j.1471-0528.1999.tb08266.x.

3. Sweed M, El-Said M, Abou-Gamrah AA, et al. Comparison between 200, 400 and 600 microgram rectal misoprostol before cesarean section: a randomized clinical trial. J Obstet Gynaecol Res. 2019;45:585-591. doi: 10.1111 /jog.13883.

 

 

 

Oxytocin and prostaglandins are critically important regulators of uterine contraction. Obstetrician-gynecologists commonly prescribe oxytocin and prostaglandin agonists (misoprostol, dinoprostone) to stimulate uterine contraction for the induction of labor, prevention and treatment of postpartum hemorrhage, and treatment of miscarriage and fetal demise. The focus of this editorial is the clinical pharmacology of misoprostol.

Misoprostol is approved by the US Food and Drug Administration (FDA) for the prevention and treatment of nonsteroidal anti-inflammatory drug–induced gastric ulcers and for patients at high risk for gastric ulcers, including those with a history of gastric ulcers. The approved misoprostol route and dose for this indication is oral administration of 200 µg four times daily with food.1 Recent food intake and antacid use reduces the absorption of orally administered misoprostol. There are no FDA-approved indications for the use of misoprostol as a single agent in obstetrics and gynecology. The FDA has approved the combination of mifepristone and misoprostol for medication abortion in the first trimester. In contrast to misoprostol, PGE2 (dinoprostone) is approved by the FDA as a vaginal insert containing 10 mg of dinoprostone for the initiation and/or continuation of cervical ripening in patients at or near term in whom there is a medical or obstetric indication for induction of labor (Cervidil; Ferring Pharmaceuticals Inc, Parsippany, New Jersey).2

Pharmacology of misoprostol

Misoprostol is a prostaglandin E1 (PGE1) agonist analogue. Prostaglandin E1 (alprostadil) is rapidly metabolized, has a half-life in the range of minutes and is not orally active, requiring administration by intravenous infusion or injection. It is indicated to maintain a patent ductus arteriosus in newborns with ductal-dependent circulation and to treat erectile dysfunction.3 In contrast to PGE1, misoprostol has a methyl ester group at carbon-1 (C-1) that increases potency and duration of action. Misoprostol also has no hydroxyl group at C-15, replacing that moiety with the addition of both a methyl- and hydroxyl- group at C-16 (FIGURE). These molecular changes improve oral activity and increase duration of action.4 Pure misoprostol is a viscous oil. It is formulated into tables by dispersing the oil on hydroxypropyl methyl cellulose before compounding into tablets. Unlike naturally occurring prostaglandins (PGE1), misoprostol tablets are stabile at room temperature for years.4

 

Following absorption, the methyl ester at C-1 is enzymatically cleaved, yielding misoprostol acid, the active drug.4 Misoprostol binds to the E prostanoid receptor 3 (EP-3).5 Activation of myometrial EP-3 receptor induces an increase in intracellular phosphoinositol turnover and calcium mobilization, resulting in an increase in intracellular-free calcium, triggering actin-myosin contractility.6 The increase in free calcium is propagated cell-to-cell through gap junctions that link the myometrial cells to facilitate the generation of a coordinated contraction.

Misoprostol: Various routes of administration are not equal

Misoprostol can be given by an oral, buccal, vaginal, or rectal route of administration. To study the effect of the route of administration on uterine tone and contractility, investigators randomly assigned patients at 8 to 11 weeks’ gestation to receive misoprostol 400 µg as a single dose by the oral or vaginal route. Uterine tone and contractility were measured using an intrauterine pressure transducer. Compared to vaginal administration, oral administration of misprostol was associated with rapid attainment of peak plasma level at 30 minutes, followed by a decline in concentration by 60 minutes. This rapid onset and rapid offset of plasma concentration was paralleled by the onset of uterine tone within 8 minutes, but surprisingly no sustained uterine contractions.7 By contrast, following vaginal administration of misoprostol, serum levels rose slowly and peaked in 1 to 2 hours. Uterine tone increased within 21 minutes, and sustained uterine contractions were recorded for 4 hours.7 The rapid rise and fall in plasma misoprostol following oral administration and the more sustained plasma misoprostol concentration over 4 hours has been previously reported.8 In a second study involving patients 8 to 11 weeks’ gestation, the effect of a single dose of misoprostol 400 µg by an oral or vaginal route on uterine contractility was compared using an intrauterine pressure transducer.9 Confirming previous results, the time from misoprostol administration to increased uterine tone was more rapid with oral than with vaginal administration (8 min vs 19 min). Over the course of 4 hours, uterine contraction activity was greater with vaginal than with oral administration (454 vs 166 Montevideo units).9

Both studies reported that oral administration of misoprostol resulted in more rapid onset and offset of action than vaginal administration. Oral administration of a single dose of misoprostol 400 µg did not result in sustained uterine contractions in most patients in the first trimester. Vaginal administration produced a slower onset of increased uterine tone but sustained uterine contractions over 4 hours. Compared with vaginal administration of misoprostol, the rapid onset and offset of action of oral misoprostol may reduce the rate of tachysystole and changes in fetal heart rate observed with vaginal administration.10

An important finding is that buccal and vaginal administration of misoprostol have similar effects on uterine tone in the first trimester.11 To study the effect of buccal and vaginal administration of misoprostol on uterine tone, patients 6 to 13 weeks’ gestation were randomly allocated to receive a single dose of misoprostol 400 µg by a buccal or vaginal route.11 Uterine activity over 5 hours following administration was assessed using an intrauterine pressure transducer. Uterine tone 20 to 30 minutes after buccal or vaginal administration of misoprostol (400 µg) was 27 and 28 mm Hg, respectively. Peak uterine tone, as measured by an intrauterine pressure transducer, for buccal and vaginal administration of misoprostol was 49 mm Hg and 54 mm Hg, respectively. Total Alexandria units (AU) over 5 hours following buccal or vaginal administration was 6,537 AU and 6,090 AU, respectively.11

An AU is calculated as the average amplitude of the contractions (mm Hg) multiplied by the average duration of the contractions (min) multiplied by average frequency of contraction over 10 minutes.12 By contrast, a Montevideo unit does not include an assessment of contraction duration and is calculated as average amplitude of contractions (mm Hg) multiplied by frequency of uterine contractions over 10 minutes.12

In contrast to buccal or vaginal administration, rectal administration of misoprostol resulted in much lower peak uterine tone and contractility as measured by a pressure transducer. Uterine tone 20 to 30 minutes after vaginal and rectal administration of misoprostol (400 µg) was 28 and 19 mm Hg, respectively.11 Peak uterine tone, as measured by an intrauterine pressure transducer, for vaginal and rectal administration of misoprostol was 54 and 31 mm Hg, respectively. AUs over 5 hours following vaginal and rectal administration was 6,090 AU and 2,768 AU, respectively.11 Compared with buccal and vaginal administration of misoprostol, rectal administration produced less sustained uterine contractions in the first trimester of pregnancy. To achieve maximal sustained uterine contractions, buccal and vaginal routes of administration are superior to oral and rectal administration.

Continue to: Misoprostol and cervical ripening...

 

 

Misoprostol and cervical ripening

Misoprostol is commonly used to soften and ripen the cervix. Some of the cervical ripening effects of misoprostol are likely due to increased uterine tone. In addition, misoprostol may have a direct effect on the collagen structure of the cervix. To study the effect of misoprostol on the cervix, pregnant patients in the first trimester were randomly assigned to receive misoprostol 200 µg by vaginal self-administration, isosorbide mononitrate (IMN) 40 mg by vaginal self-administration or no treatment the evening prior to pregnancy termination.13 The following day, before uterine evacuation, a cervical biopsy was obtained for electron microscopy studies and immunohistochemistry to assess the presence of enzymes involved in collagen degradation, including matrix metalloproteinase 1 (MMP-1) and matrix metalloproteinase 9 (MMP-9). Electron microscopy demonstrated that pretreatment with misoprostol resulted in a pronounced splitting and disorganization of collagen fibers.13 Compared with misoprostol treatment, IMN produced less splitting and disorganization of collagen fibers, and in the no treatment group, no marked changes in the collagen framework were observed.

Compared with no treatment, misoprostol and IMN pretreatment were associated with marked increases in MMP-1 and MMP-9 as assessed by immunohistochemistry. Misoprostol pretreatment also resulted in a significant increase in interleukin-8 concentration compared with IMN pretreatment and no treatment (8.8 vs 2.7 vs 2.4 pg/mg tissue), respectively.13 Other investigators have also reported that misoprostol increased cervical leukocyte influx and collagen disrupting enzymes MMP-8 and MMP-9.14,15

An open-label clinical trial compared the efficacy of misoprostol versus Foley catheter for labor induction at term in 1,859 patients ≥ 37 weeks’ gestation with a Bishop score <6.16 Patients were randomly allocated to misoprostol (50 µg orally every 4 hours up to 3 times in 24 hours) versus placement of a 16 F or 18 F Foley catheter introduced through the cervix, filled with 30 mL of sodium chloride or water. The investigators reported that oral misoprostol and Foley catheter cervical ripening had similar safety and effectiveness for cervical ripening as a prelude to induction of labor, including no statistically significant differences in 5-minute Apgar score <7, umbilical cord artery pH ≤ 7.05, postpartum hemorrhage, or cesarean birth rate.16

Bottom line

Misoprostol and oxytocin are commonly prescribed in obstetric practice for cervical ripening and induction of labor, respectively. The dose and route of administration of misoprostol influences the effect on the uterus. For cervical ripening, where rapid onset and offset may help to reduce the risk of uterine tachysystole and worrisome fetal heart rate changes, low-dose (50 µg) oral administration of misoprostol may be a preferred dose and route. For the treatment of miscarriage and fetal demise, to stimulate sustained uterine contractions over many hours, buccal and vaginal administration of misoprostol are preferred. Rectal administration is generally inferior to buccal and vaginal administration for stimulating sustained uterine contractions and its uses should be limited. ●

 
Misoprostol and pyrexia

Common side effects of misoprostol are abdominal cramping, diarrhea, nausea, vomiting, headache, and fever. Elevated temperature following misoprostol administration is a concerning side effect that may require further investigation to rule out an infection, especially if the elevated temperature persists for > 4 hours. The preoptic area of the anterior hypothalamus (POAH) plays a major role in thermoregulation. When an infection causes an increase in endogenous pyrogens, including interleukin-1β, interleukin-6 and tumor necrosis factor, prostaglandins are generated in the region of the POAH, increasing the thermoregulatory set point, triggering cutaneous vasoconstriction and shivering and non-shivering thermogenesis.1 Misoprostol, especially at doses >400 µg commonly causes both patient-reported chills and temperature elevation >38° C.

In a study comparing misoprostol and oxytocin for the management of the third stage of labor, 597 patients were randomly allocated to receive oxytocin 10 units by intramuscular injection or misoprostol 400 µg or 600 µg by the oral route.2 Patient-reported shivering occurred in 13%, 19%, and 28% of patients receiving oxytocin, misoprostol 400 µg and misoprostol 800 µg, respectively. A recorded temperature >38° C occurred within 1 hour of medication administration in approximately 3%, 2%, and 7.5% of patients receiving oxytocin, misoprostol 400 µg, and misoprostol 800 µg, respectively. In another study, 453 patients scheduled for a cesarean birth were randomly allocated to receive 1 of 3 doses of rectal misoprostol 200 μg, 400 μg, or 600 μg before incision. Fever was detected in 2.6%, 9.9%, and 5.1% of the patients receiving misoprostol 200 μg, 400 μg, or 600 μg, respectively.3

References

1. Aronoff DM, Neilson EG. Antipyretics: mechanisms of action and clinical use in fever suppression. Am J Med. 2001;111:304-315. doi: 10.1016/s0002-9343(01)00834-8.

2. Lumbiganon P, Hofmeyr J, Gumezoglu AM, et al. Misoprostol dose-related shivering and pyrexia in the third stage of labor. WHO Collaborative Trial of Misoprostol in the Management of the Third Stage of Labor. Br J Obstet Gynaecol. 1999;106:304-308. doi: 10.1111/j.1471-0528.1999.tb08266.x.

3. Sweed M, El-Said M, Abou-Gamrah AA, et al. Comparison between 200, 400 and 600 microgram rectal misoprostol before cesarean section: a randomized clinical trial. J Obstet Gynaecol Res. 2019;45:585-591. doi: 10.1111 /jog.13883.

 

References

 

  1. Cytotec [package insert]. Chicago, IL: GD Searle & Co. https://www.accessdata.fda.gov/drugsatfda_docs/label/2002/19268slr037.pdf. Accessed June 20, 2022.
  2. Cervidil [package insert]. St Louis, MO: Forrest Pharmaceuticals Inc.; May 2006. Accessed June 20, 2022.
  3. Caverject [package insert]. New York, NY: Pfizer Inc.; March 2014. Accessed June 20, 2022.
  4. Collins PW. Misoprostol: discovery, development and clinical applications. Med Res Rev. 1990;10:149-172. doi: 10.1002/med.2610100202.
  5. Audit M, White KI, Breton B, et al. Crystal structure of misoprostol bound to the labor inducer prostaglandin E2 receptor. Nat Chem Biol. 2019;15:11-17. doi: 10.1038/s41589-018-0160-y.
  6. Pallliser KH, Hirst JJ, Ooi G, et al. Prostaglandin E and F receptor expression and myometrial sensitivity in labor onset in the sheep. Biol Reprod. 2005;72:937-943. doi: 10.1095/biolreprod.104.035311.
  7. Gemzell-Danilesson K, Marions L, Rodriguez A, et al. Comparison between oral and vaginal administration of misoprostol on uterine contractility. Obstet Gynecol. 1999;93:275-280. doi: 10.1016/s0029-7844(98)00436-0.
  8. Zieman M, Fong SK, Benowitz NL, et al. Absorption kinetics of misoprostol with oral or vaginal administration. Obstet Gynecol. 1997;90:88-92. doi: 10.1016/S0029-7844(97)00111-7.
  9. Aronsson A, Bygdeman M, Gemzell-Danielsson K. Effects of misoprostol on uterine contractility following different routes of administration. Hum Reprod. 2004;19:81-84. doi: 10.1093/humrep/deh005.
  10. Young DC, Delaney T, Armson BA, et al. Oral misoprostol, low dose vaginal misoprostol and vaginal dinoprostone for labor induction: randomized controlled trial. PLOS One. 2020;15:e0227245. doi: 10.1371/journal.pone.0227245.
  11. Meckstroth KR, Whitaker AK, Bertisch S, et al. Misoprostol administered by epithelial routes. Drug absorption and uterine response. Obstet Gynecol. 2006;108:582-590. doi: 10.1097/01.AOG.0000230398.32794.9d.
  12. el-Sahwi S, Gaafar AA, Toppozada HK. A new unit for evaluation of uterine activity. Am J Obstet Gynecol. 1967;98:900-903. doi: 10.1016/0002-9378(67)90074-9.
  13. Vukas N, Ekerhovd E, Abrahamsson G, et al. Cervical priming in the first trimester: morphological and biochemical effects of misoprostol and isosorbide mononitrate. Acta Obstet Gyecol. 2009;88:43-51. doi: 10.1080/00016340802585440.
  14. Aronsson A, Ulfgren AK, Stabi B, et al. The effect of orally and vaginally administered misoprostol on inflammatory mediators and cervical ripening during early pregnancy. Contraception. 2005;72:33-39. doi: 10.1016/j.contraception.2005.02.012.
  15. Denison FC, Riley SC, Elliott CL, et al. The effect of mifepristone administration on leukocyte populations, matrix metalloproteinases and inflammatory mediators in the first trimester cervix. Mol Hum Reprod. 2000;6:541-548. doi: 10.1093/molehr/6.6.541.
  16. ten Eikelder MLG, Rengerink KO, Jozwiak M, et al. Induction of labour at term with oral misoprostol versus a Foley catheter (PROBAAT-II):  a multicentre randomised controlled non-inferiority trial. Lancet. 2016;387:1619-1628. doi: 10.1016 /S0140-6736(16)00084-2.
References

 

  1. Cytotec [package insert]. Chicago, IL: GD Searle & Co. https://www.accessdata.fda.gov/drugsatfda_docs/label/2002/19268slr037.pdf. Accessed June 20, 2022.
  2. Cervidil [package insert]. St Louis, MO: Forrest Pharmaceuticals Inc.; May 2006. Accessed June 20, 2022.
  3. Caverject [package insert]. New York, NY: Pfizer Inc.; March 2014. Accessed June 20, 2022.
  4. Collins PW. Misoprostol: discovery, development and clinical applications. Med Res Rev. 1990;10:149-172. doi: 10.1002/med.2610100202.
  5. Audit M, White KI, Breton B, et al. Crystal structure of misoprostol bound to the labor inducer prostaglandin E2 receptor. Nat Chem Biol. 2019;15:11-17. doi: 10.1038/s41589-018-0160-y.
  6. Pallliser KH, Hirst JJ, Ooi G, et al. Prostaglandin E and F receptor expression and myometrial sensitivity in labor onset in the sheep. Biol Reprod. 2005;72:937-943. doi: 10.1095/biolreprod.104.035311.
  7. Gemzell-Danilesson K, Marions L, Rodriguez A, et al. Comparison between oral and vaginal administration of misoprostol on uterine contractility. Obstet Gynecol. 1999;93:275-280. doi: 10.1016/s0029-7844(98)00436-0.
  8. Zieman M, Fong SK, Benowitz NL, et al. Absorption kinetics of misoprostol with oral or vaginal administration. Obstet Gynecol. 1997;90:88-92. doi: 10.1016/S0029-7844(97)00111-7.
  9. Aronsson A, Bygdeman M, Gemzell-Danielsson K. Effects of misoprostol on uterine contractility following different routes of administration. Hum Reprod. 2004;19:81-84. doi: 10.1093/humrep/deh005.
  10. Young DC, Delaney T, Armson BA, et al. Oral misoprostol, low dose vaginal misoprostol and vaginal dinoprostone for labor induction: randomized controlled trial. PLOS One. 2020;15:e0227245. doi: 10.1371/journal.pone.0227245.
  11. Meckstroth KR, Whitaker AK, Bertisch S, et al. Misoprostol administered by epithelial routes. Drug absorption and uterine response. Obstet Gynecol. 2006;108:582-590. doi: 10.1097/01.AOG.0000230398.32794.9d.
  12. el-Sahwi S, Gaafar AA, Toppozada HK. A new unit for evaluation of uterine activity. Am J Obstet Gynecol. 1967;98:900-903. doi: 10.1016/0002-9378(67)90074-9.
  13. Vukas N, Ekerhovd E, Abrahamsson G, et al. Cervical priming in the first trimester: morphological and biochemical effects of misoprostol and isosorbide mononitrate. Acta Obstet Gyecol. 2009;88:43-51. doi: 10.1080/00016340802585440.
  14. Aronsson A, Ulfgren AK, Stabi B, et al. The effect of orally and vaginally administered misoprostol on inflammatory mediators and cervical ripening during early pregnancy. Contraception. 2005;72:33-39. doi: 10.1016/j.contraception.2005.02.012.
  15. Denison FC, Riley SC, Elliott CL, et al. The effect of mifepristone administration on leukocyte populations, matrix metalloproteinases and inflammatory mediators in the first trimester cervix. Mol Hum Reprod. 2000;6:541-548. doi: 10.1093/molehr/6.6.541.
  16. ten Eikelder MLG, Rengerink KO, Jozwiak M, et al. Induction of labour at term with oral misoprostol versus a Foley catheter (PROBAAT-II):  a multicentre randomised controlled non-inferiority trial. Lancet. 2016;387:1619-1628. doi: 10.1016 /S0140-6736(16)00084-2.
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Appropriate antibiotic selection for 12 common infections in obstetric patients

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Tue, 09/06/2022 - 12:50

 

 

For the infections we most commonly encounter in obstetric practice, I review in this article the selection of specific antibiotics. I focus on the key pathogens that cause these infections, the most useful diagnostic tests, and the most cost-effective antibiotic therapy. Relative cost estimates (high vs low) for drugs are based on information published on the GoodRx website (https://www.goodrx.com/). Actual charges to patients, of course, may vary widely depending on contractual relationships between hospitals, insurance companies, and wholesale vendors. The infections are listed in alphabetical order, not in order of frequency or severity.

1. Bacterial vaginosis

Bacterial vaginosis (BV) is a polymicrobial infection that results from perturbation of the normal vaginal flora due to conditions such as pregnancy, hormonal therapy, and changes in the menstrual cycle. It is characterized by a decrease in the vaginal concentration of Lactobacillus crispatus, followed by an increase in Prevotella bivia, Gardnerella vaginalis, Mobiluncus species, Atopobium vaginae, and Megasphaera type 1.1,2

 

BV is characterized by a thin, white-gray malodorous (fishlike smell) discharge. The vaginal pH is >4.5. Clue cells are apparent on saline microscopy, and the whiff (amine) test is positive when potassium hydroxide is added to a drop of vaginal secretions. Diagnostic accuracy can be improved using one of the new vaginal panel assays such as BD MAX Vaginal Panel (Becton, Dickinson and Company).3

Antibiotic selection

Antibiotic treatment of BV is directed primarily at the anaerobic component of the infection. The preferred treatment is oral metronidazole 500 mg twice daily for 7 days. If the patient cannot tolerate metronidazole, oral clindamycin 300 mg twice daily for 7 days, can be used, although it is more expensive than metronidazole. Topical metronidazole vaginal gel (0.75%), 1 applicatorful daily for 5 days, is effective in treating the local vaginal infection, but it is not effective in preventing systemic complications such as preterm labor, chorioamnionitis, and puerperal endometritis.2 It also is significantly more expensive than the oral formulation of metronidazole. Topical clindamycin cream, 1 applicatorful daily for 5 days, is even more expensive.

Tinidazole 2 g orally daily for 2 days is an effective alternative to oral metronidazole. Single-dose therapy with oral secnidazole (2 g), a 5-nitroimidazole with a longer half-life than metronidazole, has been effective in small studies, but experience with this drug in the United States is limited. Secnidazole is also very expensive.4

 

2. Candidiasis

Vulvovaginal candidiasis usually is caused by Candida albicans. Other less common species include C tropicalis, C glabrata, C auris, C lusitaniae, and C krusei. The most common clinical findings are vulvovaginal pruritus in association with a curdlike white vaginal discharge. The diagnosis can be established by confirmation of a normal vaginal pH and identification of budding yeast and hyphae on a potassium hydroxide preparation. As noted above for BV, the vaginal panel assay improves the accuracy of clinical diagnosis.3 Culture usually is indicated only in patients with infections that are refractory to therapy.

Continue to: Antibiotic selection...

 

 

Antibiotic selection

In the first trimester of pregnancy, vulvovaginal candidiasis should be treated with a topical medication such as clotrimazole cream 1% (50 mg intravaginally daily for 7 days), miconazole cream 2% (100 mg intravaginally daily for 7 days), or terconazole cream 0.4% (50 g intravaginally daily for 7 days). Single-dose formulations or 3-day courses of treatment may not be quite as effective in pregnant patients, but they do offer a more convenient dosing schedule.2,5

Oral fluconazole should not be used in the first trimester of pregnancy because it has been associated with an increased risk for spontaneous abortion and with fetal cardiac septal defects. Beyond the first trimester, oral fluconazole offers an attractive option for treatment of vulvovaginal candidiasis. The appropriate dose is 150 mg initially, with a repeat dose in 3 days if symptoms persist.2,5

Ibrexafungerp (300 mg twice daily for 1 day) was recently approved by the US Food and Drug Administration (FDA) for oral treatment of vulvovaginal candidiasis. However, this drug is teratogenic and is contraindicated during pregnancy and lactation. It also is significantly more expensive than fluconazole.6

3. Cesarean delivery prophylaxis

All women having a cesarean delivery (CD) should receive antibiotic prophylaxis to reduce the risk of endometritis and wound infection.

 

Antibiotic selection

In my opinion, the preferred regimen is intravenous cefazolin 2 g plus azithromycin 500 mg administered preoperatively.7 Cefazolin can be administered in a rapid bolus; azithromycin should be administered over 1 hour.

In an exceptionally rigorous investigation called the C/SOAP trial (Cesarean Section Optimal Antibiotic Prophylaxis trial), Tita and colleagues showed that the combination of cefazolin plus azithromycin was superior to single-agent prophylaxis (usually with cefazolin) in preventing the composite of endometritis, wound infection, or other infection occurring within 6 weeks of surgery.8 The additive effect of azithromycin was particularly pronounced in patients having CD after labor and rupture of membranes. Harper and associates subsequently validated the cost-effectiveness of this combination regimen using a decision analytic model.9

If the patient has a serious allergy to β-lactam antibiotics, the best alternative regimen for prophylaxis is clindamycin plus gentamicin. The appropriate single intravenous dose of clindamycin is 900 mg; the single dose of gentamicin should be 5 mg/kg of ideal body weight (IBW).7

4. Chlamydia

Chlamydia trachomatis is an obligate intracellular bacterium. In pregnant women, it typically causes urethritis, endocervicitis, and inflammatory proctitis. Along with gonorrhea, it is the cause of an unusual infection/inflammation of the liver capsule, termed Fitz-Hugh-Curtis syndrome (perihepatitis). The diagnosis of chlamydia infection is best confirmed with a nucleic acid amplification test (NAAT). The NAAT simultaneously tests for chlamydia and gonorrhea in urine or in secretions obtained from the urethra, endocervix, and rectum.2

Antibiotic selection

The drug of choice for treating chlamydia in pregnancy is azithromycin 1,000 mg orally in a single dose. Erythromycin can be used as an alternative to azithromycin, but it usually is not well tolerated because of gastrointestinal adverse effects. In my practice, the preferred alternative for a patient who cannot tolerate azithromycin is amoxicillin 500 mg orally 3 times daily for 7 days.2,10

Continue to: 5. Chorioamnionitis...

 

 

5. Chorioamnionitis

Chorioamnionitis is a polymicrobial infection caused by anaerobes, aerobic gram-negative bacilli (predominantly Escherichia coli), and aerobic gram-positive cocci (primarily group B streptococci [GBS]). The diagnosis usually is made based on clinical examination: maternal fever, maternal and fetal tachycardia, and no other localizing sign of infection. The diagnosis can be confirmed by obtaining a sample of amniotic fluid via amniocentesis or via aspiration through the intrauterine pressure catheter and demonstrating a positive Gram stain, low glucose concentration (<20 mg/dL), positive nitrites, positive leukocyte esterase, and ultimately, a positive bacteriologic culture.2

Antibiotic selection

The initial treatment of chorioamnionitis specifically targets the 2 major organisms that cause neonatal pneumonia, meningitis, and sepsis: GBS and E coli. For many years, the drugs of choice have been intravenous ampicillin (2 g every 6 hours) plus intravenous gentamicin (5 mg/kg of IBW every 24 hours). Gentamicin also can be administered intravenously at a dose of 1.5 mg/kg every 8 hours. I prefer the once-daily dosing for 3 reasons:

  • Gentamicin works by a concentration-dependent mechanism; the higher the initial serum concentration, the better the killing effect.
  • Once-daily dosing preserves long periods with low trough levels, an effect that minimizes ototoxicity and nephrotoxicity.
  • Once-daily dosing is more convenient.

In a patient who has a contraindication to use of an aminoglycoside, aztreonam (2 g intravenously every 8 hours) may be combined with ampicillin.2

If the patient delivers vaginally, 1 dose of each drug should be administered postpartum, and then the antibiotics should be discontinued. If the patient delivers by cesarean, a single dose of a medication with strong anaerobic coverage should be administered immediately after the infant’s umbilical cord is clamped. Options include clindamycin (900 mg intravenously) or metronidazole (500 mg intravenously).11

There are 2 key exceptions to the single postpartum dose rule, however. If the patient is obese (body mass index [BMI] >30 kg/m2) or if the membranes have been ruptured for more than 24 hours, antibiotics should be continued until she has been afebrile and asymptomatic for 24 hours.12

Two single agents are excellent alternatives to the combination ampicillin-gentamicin regimen. One is ampicillin-sulbactam, 3 g intravenously every 6 hours. The other is piperacillin-tazobactam, 3.375 g intravenously every 6 hours. These extended-spectrum penicillins provide exceptionally good coverage against the major pathogens that cause chorioamnionitis. Although more expensive than the combination regimen, they avoid the potential ototoxicity and nephrotoxicity associated with gentamicin.2

6. Endometritis

Puerperal endometritis is significantly more common after CD than after vaginal delivery. The infection is polymicrobial, and the principal pathogens are anaerobic gram-positive cocci, anaerobic gram-negative bacilli, aerobic gram-negative bacilli, and aerobic gram-positive cocci. The diagnosis usually is made almost exclusively based on clinical findings: fever within 24 to 36 hours of delivery, tachycardia, mild tachypnea, and lower abdominal/pelvic pain and tenderness in the absence of any other localizing sign of infection.13

Antibiotic selection

Effective treatment of endometritis requires administration of antibiotics that provide coverage against the broad range of pelvic pathogens. For many years, the gold standard of treatment has been the combination regimens of clindamycin plus gentamicin or metronidazole plus ampicillin plus gentamicin. These drugs are available in generic form and are relatively inexpensive. However, several broad-spectrum single agents are now available for treatment of endometritis. Although they are moderately more expensive than the generic combination regimens, they usually are very well tolerated, and they avoid the potential nephrotoxicity and ototoxicity associated with gentamicin. TABLE 1 summarizes the dosing regimens of these various agents and their potential weaknesses in coverage.2,13

7. Gonorrhea

Gonorrhea is caused by the gram-negative diplococcus, Neisseria gonorrhoeae. The organism has a propensity to infect columnar epithelium and uroepithelium, and, typically, it causes a localized infection of the urethra, endocervix, and rectum. The organism also can cause an oropharyngeal infection, a disseminated infection (most commonly manifested by dermatitis and arthritis), and perihepatitis.

The diagnosis is best confirmed by a NAAT that can simultaneously test for gonorrhea and chlamydia in urine or in secretions obtained from the urethra, endocervix, and rectum.2,10

Antibiotic selection

The drugs of choice for treating uncomplicated gonococcal infection in pregnancy are a single dose of ceftriaxone 500 mg intramuscularly, or cefixime 800 mg orally. If the patient is allergic to β-lactam antibiotics, the recommended treatment is gentamicin 240 mg intramuscularly in a single dose, combined with azithromycin 2,000 mg orally.14

8. Group B streptococci prophylaxis

The first-line agents for GBS prophylaxis are penicillin and ampicillin. Resistance of GBS to either of these antibiotics is extremely rare. The appropriate penicillin dose is 3 million U intravenously every 4 hours; the intravenous dose of ampicillin is 2 g initially, then 1 g every 4 hours. I prefer penicillin for prophylaxis because it has a narrower spectrum of activity and is less likely to cause antibiotic-associated diarrhea. The antibiotic should be continued until delivery of the neonate.2,15,16

If the patient has a mild allergy to penicillin, the drug of choice is cefazolin 2 g intravenously initially, then 1 g every 8 hours. If the patient’s allergy to β-lactam antibiotics is severe, the alternative agents are vancomycin (20 mg/kg intravenously every 8 hours infused over 1–2 hours; maximum single dose of 2 g) and clindamycin (900 mg intravenously every 8 hours). The latter drug should be used only if sensitivity testing has confirmed that the GBS strain is sensitive to clindamycin. Resistance to clindamycin usually ranges from 10% to 15%.2,15,16

9. Puerperal mastitis

The principal microorganisms that cause puerperal mastitis are the aerobic streptococci and staphylococci that form part of the normal skin flora. The diagnosis usually is made based on the characteristic clinical findings: erythema, tenderness, and warmth in an area of the breast accompanied by a purulent nipple discharge and fever and chills. The vast majority of cases can be treated with oral antibiotics on an outpatient basis. The key indications for hospitalization are severe illness, particularly in an immunocompromised patient, and suspicion of a breast abscess.2

Continue to: Antibiotic selection...

 

 

Antibiotic selection

The initial drug of choice for treatment of mastitis is dicloxacillin sodium 500 mg every 6 hours for 7 to 10 days. If the patient has a mild allergy to penicillin, the appropriate alternative is cephalexin 500 mg every 8 hours for 7 to 10 days. If the patient’s allergy to penicillin is severe, 2 alternatives are possible. One is clindamycin 300 mg twice daily for 7 to 10 days; the other is trimethoprim-sulfamethoxazole double strength (800 mg/160 mg), twice daily for 7 to 10 days. The latter 2 drugs are also of great value if the patient fails to respond to initial therapy and/or infection with methicillin-resistant Staphylococcus aureus (MRSA) is suspected.2 I prefer the latter agent because it is less expensive than clindamycin and is less likely to cause antibiotic-induced diarrhea.

If hospitalization is required, the drug of choice is intravenous vancomycin. The appropriate dosage is 20 mg/kg every 8 to 12 hours (maximum single dose of 2 g).2

10. Syphilis

Syphilis is caused by the spirochete bacterium, Treponema pallidum. The diagnosis can be made by clinical examination if the characteristic findings listed in TABLE 2 are present.2,17 However, most patients in our practice will have latent syphilis, and the diagnosis must be established based on serologic screening.17

Antibiotic selection

In pregnancy, the treatment of choice for syphilis is penicillin (TABLE 3).2,10,17 Only penicillin has been proven effective in treating both maternal and fetal infection. If the patient has a history of allergy to penicillin, she should undergo skin testing to determine if she is truly allergic. If hypersensitivity is confirmed, the patient should be desensitized and then treated with the appropriate regimen outlined in TABLE 3. Of interest, within a short period of time after treatment, the patient’s sensitivity to penicillin will be reestablished, and she should not be treated again with penicillin unless she undergoes another desensitization process.2,17

 

11. Trichomoniasis

Trichomoniasis is caused by the flagellated protozoan, Trichomonas vaginalis. The condition is characterized by a distinct yellowish-green vaginal discharge. The vaginal pH is >4.5, and motile flagellated organisms are easily visualized on saline microscopy. The vaginal panel assay also is a valuable diagnostic test.3

Antibiotic selection

The drug of choice for trichomoniasis is oral metronidazole 500 mg twice daily for 7 days. The patient’s sexual partner(s) should be treated concurrently to prevent reinfection. Most treatment failures are due to poor compliance with therapy on the part of either the patient or her partner(s); true drug resistance is uncommon. When antibiotic resistance is strongly suspected, the patient may be treated with a single 2-g oral dose of tinidazole.2

12. Urinary tract infections

Urethritis

Acute urethritis usually is caused by C trachomatis or N gonorrhoeae. The treatment of infections with these 2 organisms is discussed above.

Asymptomatic bacteriuria and acute cystitis

Bladder infections are caused primarily by E coli, Klebsiella pneumoniae, and Proteus species. Gram-positive cocci such as enterococci, Staphylococcus saprophyticus, and GBS are less common pathogens.18

The key diagnostic criterion for asymptomatic bacteriuria is a colony count greater than 100,000 organisms/mL of a single uropathogen on a clean-catch midstream urine specimen.18

The usual clinical manifestations of acute cystitis include frequency, urgency, hesitancy, suprapubic discomfort, and a low-grade fever. The diagnosis is most effectively confirmed by obtaining urine by catheterization and demonstrating a positive nitrite and positive leukocyte esterase reaction on dipstick examination. The finding of a urine pH of 8 or greater usually indicates an infection caused by Proteus species. When urine is obtained by catheterization, the criterion for defining a positive culture is greater than 100 colonies/mL.18

Antibiotic selection. In the first trimester, the preferred agents for treatment of a lower urinary tract infection are oral amoxicillin (875 mg twice daily) or cephalexin (500 mg every 8 hours). For an initial infection, a 3-day course of therapy usually is adequate. For a recurrent infection, a 7- to 10-day course is indicated.

Beyond the first trimester, nitrofurantoin monohydrate macrocrystals (100 mg orally twice daily) or trimethoprim-sulfamethoxazole double strength (800 mg/160 mg twice daily) are the preferred agents. Unless no other oral drug is likely to be effective, these 2 drugs should be avoided in the first trimester. The former has been associated with eye, heart, and cleft defects. The latter has been associated with neural tube defects, cardiac anomalies, choanal atresia, and diaphragmatic hernia.18

Acute pyelonephritis

Acute infections of the kidney usually are caused by the aerobic gram-negative bacilli: E coli, K pneumoniae, and Proteus species. Enterococci, S saprophyticus, and GBS are less likely to cause upper tract infection as opposed to bladder infection.

The typical clinical manifestations of acute pyelonephritis include high fever and chills in association with flank pain and tenderness. The diagnosis is best confirmed by obtaining urine by catheterization and documenting the presence of a positive nitrite and leukocyte esterase reaction. Again, an elevated urine pH is indicative of an infection secondary to Proteus species. The criterion for defining a positive culture from catheterized urine is greater than 100 colonies/mL.2,18

Antibiotic selection. Patients in the first half of pregnancy who are hemodynamically stable and who show no signs of preterm labor may be treated with oral antibiotics as outpatients. The 2 drugs of choice are amoxicillin-clavulanate (875 mg twice daily for 7 to 10 days) or trimethoprim-sulfamethoxazole double strength (800 mg/160 mg twice daily for 7 to 10 days).

For unstable patients in the first half of pregnancy and for essentially all patients in the second half of pregnancy, parenteral treatment should be administered on an inpatient basis. My preference for treatment is ceftriaxone, 2 g intravenously every 24 hours. The drug provides excellent coverage against almost all the uropathogens. It has a convenient dosing schedule, and it usually is very well tolerated. Parenteral therapy should be continued until the patient has been afebrile and asymptomatic for 24 to 48 hours. At this point, the patient can be transitioned to one of the oral regimens listed above and managed as an outpatient. If the patient is allergic to β-lactam antibiotics, an excellent alternative is aztreonam, 2 g intravenously every 8 hours.2,18

References
  1. Reeder CF, Duff P. A case of BV during pregnancy: best management approach. OBG Manag. 2021;33(2):38-42.
  2. Duff P. Maternal and perinatal infection in pregnancy: bacterial. In: Landon MB, Galan HL, Jauniaux ERM, et al, eds. Gabbe’s Obstetrics: Normal and Problem Pregnancies, 8th ed. Elsevier; 2021:1124-1145.
  3. Broache M, Cammarata CL, Stonebraker E, et al. Performance of a vaginal panel assay compared with the clinical diagnosis of vaginitis. Obstet Gynecol. 2021;138:853-859.
  4. Hiller SL, Nyirjesy P, Waldbaum AS, et al. Secnidazole treatment of bacterial vaginosis: a randomized controlled trial. Obstet Gynecol. 2017;130:379-386.
  5. Kirkpatrick K, Duff P. Candidiasis: the essentials of diagnosis and treatment. OBG Manag. 2020;32(8):27-29, 34.
  6.  Ibrexafungerp (Brexafemme) for vulvovaginal candidiasis. Med Lett Drugs Ther. 2021;63:141-143.
  7. Duff P. Prevention of infection after cesarean delivery. Clin Obstet Gynecol. 2019;62:758-770.
  8. Tita AT, Szychowski JM, Boggess K, et al; for the C/SOAP Trial Consortium. Adjunctive azithromycin prophylaxis for cesarean delivery. N Engl J Med. 2016;375:1231-1241.
  9. Harper LM, Kilgore M, Szychowski JM, et al. Economic evaluation of adjunctive azithromycin prophylaxis for cesarean delivery. Obstet Gynecol. 2017;130:328-334. 
  10. Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Morbid Mortal Wkly Rep. 2015;64(RR3):1-137.
  11. Edwards RK, Duff P. Single additional dose postpartum therapy for women with chorioamnionitis. Obstet Gynecol. 2003;102(5 pt 1):957-961.
  12. Black LP, Hinson L, Duff P. Limited course of antibiotic treatment for chorioamnionitis. Obstet Gynecol. 2012;119:1102-1105.
  13. Duff P. Fever following cesarean delivery: what are your steps for management? OBG Manag. 2021;33(12):26-30, 35.
  14. St Cyr S, Barbee L, Warkowski KA, et al. Update to CDC’s treatment guidelines for gonococcal infection, 2020. MMWR Morbid Mortal Wkly Rep. 2020;69:1911-1916.
  15. Prevention of group B streptococcal early-onset disease in newborns: ACOG committee opinion summary, number 782. Obstet Gynecol. 2019;134:1.
  16. Duff P. Preventing early-onset group B streptococcal disease in newborns. OBG Manag. 2019;31(12):26, 28-31.
  17. Finley TA, Duff P. Syphilis: cutting risk through primary prevention and prenatal screening. OBG Manag. 2020;32(11):20, 22-27.
  18. Duff P. UTIs in pregnancy: managing urethritis, asymptomatic bacteriuria, cystitis, and pyelonephritis. OBG Manag. 2022;34(1):42-46.
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For the infections we most commonly encounter in obstetric practice, I review in this article the selection of specific antibiotics. I focus on the key pathogens that cause these infections, the most useful diagnostic tests, and the most cost-effective antibiotic therapy. Relative cost estimates (high vs low) for drugs are based on information published on the GoodRx website (https://www.goodrx.com/). Actual charges to patients, of course, may vary widely depending on contractual relationships between hospitals, insurance companies, and wholesale vendors. The infections are listed in alphabetical order, not in order of frequency or severity.

1. Bacterial vaginosis

Bacterial vaginosis (BV) is a polymicrobial infection that results from perturbation of the normal vaginal flora due to conditions such as pregnancy, hormonal therapy, and changes in the menstrual cycle. It is characterized by a decrease in the vaginal concentration of Lactobacillus crispatus, followed by an increase in Prevotella bivia, Gardnerella vaginalis, Mobiluncus species, Atopobium vaginae, and Megasphaera type 1.1,2

 

BV is characterized by a thin, white-gray malodorous (fishlike smell) discharge. The vaginal pH is >4.5. Clue cells are apparent on saline microscopy, and the whiff (amine) test is positive when potassium hydroxide is added to a drop of vaginal secretions. Diagnostic accuracy can be improved using one of the new vaginal panel assays such as BD MAX Vaginal Panel (Becton, Dickinson and Company).3

Antibiotic selection

Antibiotic treatment of BV is directed primarily at the anaerobic component of the infection. The preferred treatment is oral metronidazole 500 mg twice daily for 7 days. If the patient cannot tolerate metronidazole, oral clindamycin 300 mg twice daily for 7 days, can be used, although it is more expensive than metronidazole. Topical metronidazole vaginal gel (0.75%), 1 applicatorful daily for 5 days, is effective in treating the local vaginal infection, but it is not effective in preventing systemic complications such as preterm labor, chorioamnionitis, and puerperal endometritis.2 It also is significantly more expensive than the oral formulation of metronidazole. Topical clindamycin cream, 1 applicatorful daily for 5 days, is even more expensive.

Tinidazole 2 g orally daily for 2 days is an effective alternative to oral metronidazole. Single-dose therapy with oral secnidazole (2 g), a 5-nitroimidazole with a longer half-life than metronidazole, has been effective in small studies, but experience with this drug in the United States is limited. Secnidazole is also very expensive.4

 

2. Candidiasis

Vulvovaginal candidiasis usually is caused by Candida albicans. Other less common species include C tropicalis, C glabrata, C auris, C lusitaniae, and C krusei. The most common clinical findings are vulvovaginal pruritus in association with a curdlike white vaginal discharge. The diagnosis can be established by confirmation of a normal vaginal pH and identification of budding yeast and hyphae on a potassium hydroxide preparation. As noted above for BV, the vaginal panel assay improves the accuracy of clinical diagnosis.3 Culture usually is indicated only in patients with infections that are refractory to therapy.

Continue to: Antibiotic selection...

 

 

Antibiotic selection

In the first trimester of pregnancy, vulvovaginal candidiasis should be treated with a topical medication such as clotrimazole cream 1% (50 mg intravaginally daily for 7 days), miconazole cream 2% (100 mg intravaginally daily for 7 days), or terconazole cream 0.4% (50 g intravaginally daily for 7 days). Single-dose formulations or 3-day courses of treatment may not be quite as effective in pregnant patients, but they do offer a more convenient dosing schedule.2,5

Oral fluconazole should not be used in the first trimester of pregnancy because it has been associated with an increased risk for spontaneous abortion and with fetal cardiac septal defects. Beyond the first trimester, oral fluconazole offers an attractive option for treatment of vulvovaginal candidiasis. The appropriate dose is 150 mg initially, with a repeat dose in 3 days if symptoms persist.2,5

Ibrexafungerp (300 mg twice daily for 1 day) was recently approved by the US Food and Drug Administration (FDA) for oral treatment of vulvovaginal candidiasis. However, this drug is teratogenic and is contraindicated during pregnancy and lactation. It also is significantly more expensive than fluconazole.6

3. Cesarean delivery prophylaxis

All women having a cesarean delivery (CD) should receive antibiotic prophylaxis to reduce the risk of endometritis and wound infection.

 

Antibiotic selection

In my opinion, the preferred regimen is intravenous cefazolin 2 g plus azithromycin 500 mg administered preoperatively.7 Cefazolin can be administered in a rapid bolus; azithromycin should be administered over 1 hour.

In an exceptionally rigorous investigation called the C/SOAP trial (Cesarean Section Optimal Antibiotic Prophylaxis trial), Tita and colleagues showed that the combination of cefazolin plus azithromycin was superior to single-agent prophylaxis (usually with cefazolin) in preventing the composite of endometritis, wound infection, or other infection occurring within 6 weeks of surgery.8 The additive effect of azithromycin was particularly pronounced in patients having CD after labor and rupture of membranes. Harper and associates subsequently validated the cost-effectiveness of this combination regimen using a decision analytic model.9

If the patient has a serious allergy to β-lactam antibiotics, the best alternative regimen for prophylaxis is clindamycin plus gentamicin. The appropriate single intravenous dose of clindamycin is 900 mg; the single dose of gentamicin should be 5 mg/kg of ideal body weight (IBW).7

4. Chlamydia

Chlamydia trachomatis is an obligate intracellular bacterium. In pregnant women, it typically causes urethritis, endocervicitis, and inflammatory proctitis. Along with gonorrhea, it is the cause of an unusual infection/inflammation of the liver capsule, termed Fitz-Hugh-Curtis syndrome (perihepatitis). The diagnosis of chlamydia infection is best confirmed with a nucleic acid amplification test (NAAT). The NAAT simultaneously tests for chlamydia and gonorrhea in urine or in secretions obtained from the urethra, endocervix, and rectum.2

Antibiotic selection

The drug of choice for treating chlamydia in pregnancy is azithromycin 1,000 mg orally in a single dose. Erythromycin can be used as an alternative to azithromycin, but it usually is not well tolerated because of gastrointestinal adverse effects. In my practice, the preferred alternative for a patient who cannot tolerate azithromycin is amoxicillin 500 mg orally 3 times daily for 7 days.2,10

Continue to: 5. Chorioamnionitis...

 

 

5. Chorioamnionitis

Chorioamnionitis is a polymicrobial infection caused by anaerobes, aerobic gram-negative bacilli (predominantly Escherichia coli), and aerobic gram-positive cocci (primarily group B streptococci [GBS]). The diagnosis usually is made based on clinical examination: maternal fever, maternal and fetal tachycardia, and no other localizing sign of infection. The diagnosis can be confirmed by obtaining a sample of amniotic fluid via amniocentesis or via aspiration through the intrauterine pressure catheter and demonstrating a positive Gram stain, low glucose concentration (<20 mg/dL), positive nitrites, positive leukocyte esterase, and ultimately, a positive bacteriologic culture.2

Antibiotic selection

The initial treatment of chorioamnionitis specifically targets the 2 major organisms that cause neonatal pneumonia, meningitis, and sepsis: GBS and E coli. For many years, the drugs of choice have been intravenous ampicillin (2 g every 6 hours) plus intravenous gentamicin (5 mg/kg of IBW every 24 hours). Gentamicin also can be administered intravenously at a dose of 1.5 mg/kg every 8 hours. I prefer the once-daily dosing for 3 reasons:

  • Gentamicin works by a concentration-dependent mechanism; the higher the initial serum concentration, the better the killing effect.
  • Once-daily dosing preserves long periods with low trough levels, an effect that minimizes ototoxicity and nephrotoxicity.
  • Once-daily dosing is more convenient.

In a patient who has a contraindication to use of an aminoglycoside, aztreonam (2 g intravenously every 8 hours) may be combined with ampicillin.2

If the patient delivers vaginally, 1 dose of each drug should be administered postpartum, and then the antibiotics should be discontinued. If the patient delivers by cesarean, a single dose of a medication with strong anaerobic coverage should be administered immediately after the infant’s umbilical cord is clamped. Options include clindamycin (900 mg intravenously) or metronidazole (500 mg intravenously).11

There are 2 key exceptions to the single postpartum dose rule, however. If the patient is obese (body mass index [BMI] >30 kg/m2) or if the membranes have been ruptured for more than 24 hours, antibiotics should be continued until she has been afebrile and asymptomatic for 24 hours.12

Two single agents are excellent alternatives to the combination ampicillin-gentamicin regimen. One is ampicillin-sulbactam, 3 g intravenously every 6 hours. The other is piperacillin-tazobactam, 3.375 g intravenously every 6 hours. These extended-spectrum penicillins provide exceptionally good coverage against the major pathogens that cause chorioamnionitis. Although more expensive than the combination regimen, they avoid the potential ototoxicity and nephrotoxicity associated with gentamicin.2

6. Endometritis

Puerperal endometritis is significantly more common after CD than after vaginal delivery. The infection is polymicrobial, and the principal pathogens are anaerobic gram-positive cocci, anaerobic gram-negative bacilli, aerobic gram-negative bacilli, and aerobic gram-positive cocci. The diagnosis usually is made almost exclusively based on clinical findings: fever within 24 to 36 hours of delivery, tachycardia, mild tachypnea, and lower abdominal/pelvic pain and tenderness in the absence of any other localizing sign of infection.13

Antibiotic selection

Effective treatment of endometritis requires administration of antibiotics that provide coverage against the broad range of pelvic pathogens. For many years, the gold standard of treatment has been the combination regimens of clindamycin plus gentamicin or metronidazole plus ampicillin plus gentamicin. These drugs are available in generic form and are relatively inexpensive. However, several broad-spectrum single agents are now available for treatment of endometritis. Although they are moderately more expensive than the generic combination regimens, they usually are very well tolerated, and they avoid the potential nephrotoxicity and ototoxicity associated with gentamicin. TABLE 1 summarizes the dosing regimens of these various agents and their potential weaknesses in coverage.2,13

7. Gonorrhea

Gonorrhea is caused by the gram-negative diplococcus, Neisseria gonorrhoeae. The organism has a propensity to infect columnar epithelium and uroepithelium, and, typically, it causes a localized infection of the urethra, endocervix, and rectum. The organism also can cause an oropharyngeal infection, a disseminated infection (most commonly manifested by dermatitis and arthritis), and perihepatitis.

The diagnosis is best confirmed by a NAAT that can simultaneously test for gonorrhea and chlamydia in urine or in secretions obtained from the urethra, endocervix, and rectum.2,10

Antibiotic selection

The drugs of choice for treating uncomplicated gonococcal infection in pregnancy are a single dose of ceftriaxone 500 mg intramuscularly, or cefixime 800 mg orally. If the patient is allergic to β-lactam antibiotics, the recommended treatment is gentamicin 240 mg intramuscularly in a single dose, combined with azithromycin 2,000 mg orally.14

8. Group B streptococci prophylaxis

The first-line agents for GBS prophylaxis are penicillin and ampicillin. Resistance of GBS to either of these antibiotics is extremely rare. The appropriate penicillin dose is 3 million U intravenously every 4 hours; the intravenous dose of ampicillin is 2 g initially, then 1 g every 4 hours. I prefer penicillin for prophylaxis because it has a narrower spectrum of activity and is less likely to cause antibiotic-associated diarrhea. The antibiotic should be continued until delivery of the neonate.2,15,16

If the patient has a mild allergy to penicillin, the drug of choice is cefazolin 2 g intravenously initially, then 1 g every 8 hours. If the patient’s allergy to β-lactam antibiotics is severe, the alternative agents are vancomycin (20 mg/kg intravenously every 8 hours infused over 1–2 hours; maximum single dose of 2 g) and clindamycin (900 mg intravenously every 8 hours). The latter drug should be used only if sensitivity testing has confirmed that the GBS strain is sensitive to clindamycin. Resistance to clindamycin usually ranges from 10% to 15%.2,15,16

9. Puerperal mastitis

The principal microorganisms that cause puerperal mastitis are the aerobic streptococci and staphylococci that form part of the normal skin flora. The diagnosis usually is made based on the characteristic clinical findings: erythema, tenderness, and warmth in an area of the breast accompanied by a purulent nipple discharge and fever and chills. The vast majority of cases can be treated with oral antibiotics on an outpatient basis. The key indications for hospitalization are severe illness, particularly in an immunocompromised patient, and suspicion of a breast abscess.2

Continue to: Antibiotic selection...

 

 

Antibiotic selection

The initial drug of choice for treatment of mastitis is dicloxacillin sodium 500 mg every 6 hours for 7 to 10 days. If the patient has a mild allergy to penicillin, the appropriate alternative is cephalexin 500 mg every 8 hours for 7 to 10 days. If the patient’s allergy to penicillin is severe, 2 alternatives are possible. One is clindamycin 300 mg twice daily for 7 to 10 days; the other is trimethoprim-sulfamethoxazole double strength (800 mg/160 mg), twice daily for 7 to 10 days. The latter 2 drugs are also of great value if the patient fails to respond to initial therapy and/or infection with methicillin-resistant Staphylococcus aureus (MRSA) is suspected.2 I prefer the latter agent because it is less expensive than clindamycin and is less likely to cause antibiotic-induced diarrhea.

If hospitalization is required, the drug of choice is intravenous vancomycin. The appropriate dosage is 20 mg/kg every 8 to 12 hours (maximum single dose of 2 g).2

10. Syphilis

Syphilis is caused by the spirochete bacterium, Treponema pallidum. The diagnosis can be made by clinical examination if the characteristic findings listed in TABLE 2 are present.2,17 However, most patients in our practice will have latent syphilis, and the diagnosis must be established based on serologic screening.17

Antibiotic selection

In pregnancy, the treatment of choice for syphilis is penicillin (TABLE 3).2,10,17 Only penicillin has been proven effective in treating both maternal and fetal infection. If the patient has a history of allergy to penicillin, she should undergo skin testing to determine if she is truly allergic. If hypersensitivity is confirmed, the patient should be desensitized and then treated with the appropriate regimen outlined in TABLE 3. Of interest, within a short period of time after treatment, the patient’s sensitivity to penicillin will be reestablished, and she should not be treated again with penicillin unless she undergoes another desensitization process.2,17

 

11. Trichomoniasis

Trichomoniasis is caused by the flagellated protozoan, Trichomonas vaginalis. The condition is characterized by a distinct yellowish-green vaginal discharge. The vaginal pH is >4.5, and motile flagellated organisms are easily visualized on saline microscopy. The vaginal panel assay also is a valuable diagnostic test.3

Antibiotic selection

The drug of choice for trichomoniasis is oral metronidazole 500 mg twice daily for 7 days. The patient’s sexual partner(s) should be treated concurrently to prevent reinfection. Most treatment failures are due to poor compliance with therapy on the part of either the patient or her partner(s); true drug resistance is uncommon. When antibiotic resistance is strongly suspected, the patient may be treated with a single 2-g oral dose of tinidazole.2

12. Urinary tract infections

Urethritis

Acute urethritis usually is caused by C trachomatis or N gonorrhoeae. The treatment of infections with these 2 organisms is discussed above.

Asymptomatic bacteriuria and acute cystitis

Bladder infections are caused primarily by E coli, Klebsiella pneumoniae, and Proteus species. Gram-positive cocci such as enterococci, Staphylococcus saprophyticus, and GBS are less common pathogens.18

The key diagnostic criterion for asymptomatic bacteriuria is a colony count greater than 100,000 organisms/mL of a single uropathogen on a clean-catch midstream urine specimen.18

The usual clinical manifestations of acute cystitis include frequency, urgency, hesitancy, suprapubic discomfort, and a low-grade fever. The diagnosis is most effectively confirmed by obtaining urine by catheterization and demonstrating a positive nitrite and positive leukocyte esterase reaction on dipstick examination. The finding of a urine pH of 8 or greater usually indicates an infection caused by Proteus species. When urine is obtained by catheterization, the criterion for defining a positive culture is greater than 100 colonies/mL.18

Antibiotic selection. In the first trimester, the preferred agents for treatment of a lower urinary tract infection are oral amoxicillin (875 mg twice daily) or cephalexin (500 mg every 8 hours). For an initial infection, a 3-day course of therapy usually is adequate. For a recurrent infection, a 7- to 10-day course is indicated.

Beyond the first trimester, nitrofurantoin monohydrate macrocrystals (100 mg orally twice daily) or trimethoprim-sulfamethoxazole double strength (800 mg/160 mg twice daily) are the preferred agents. Unless no other oral drug is likely to be effective, these 2 drugs should be avoided in the first trimester. The former has been associated with eye, heart, and cleft defects. The latter has been associated with neural tube defects, cardiac anomalies, choanal atresia, and diaphragmatic hernia.18

Acute pyelonephritis

Acute infections of the kidney usually are caused by the aerobic gram-negative bacilli: E coli, K pneumoniae, and Proteus species. Enterococci, S saprophyticus, and GBS are less likely to cause upper tract infection as opposed to bladder infection.

The typical clinical manifestations of acute pyelonephritis include high fever and chills in association with flank pain and tenderness. The diagnosis is best confirmed by obtaining urine by catheterization and documenting the presence of a positive nitrite and leukocyte esterase reaction. Again, an elevated urine pH is indicative of an infection secondary to Proteus species. The criterion for defining a positive culture from catheterized urine is greater than 100 colonies/mL.2,18

Antibiotic selection. Patients in the first half of pregnancy who are hemodynamically stable and who show no signs of preterm labor may be treated with oral antibiotics as outpatients. The 2 drugs of choice are amoxicillin-clavulanate (875 mg twice daily for 7 to 10 days) or trimethoprim-sulfamethoxazole double strength (800 mg/160 mg twice daily for 7 to 10 days).

For unstable patients in the first half of pregnancy and for essentially all patients in the second half of pregnancy, parenteral treatment should be administered on an inpatient basis. My preference for treatment is ceftriaxone, 2 g intravenously every 24 hours. The drug provides excellent coverage against almost all the uropathogens. It has a convenient dosing schedule, and it usually is very well tolerated. Parenteral therapy should be continued until the patient has been afebrile and asymptomatic for 24 to 48 hours. At this point, the patient can be transitioned to one of the oral regimens listed above and managed as an outpatient. If the patient is allergic to β-lactam antibiotics, an excellent alternative is aztreonam, 2 g intravenously every 8 hours.2,18

 

 

For the infections we most commonly encounter in obstetric practice, I review in this article the selection of specific antibiotics. I focus on the key pathogens that cause these infections, the most useful diagnostic tests, and the most cost-effective antibiotic therapy. Relative cost estimates (high vs low) for drugs are based on information published on the GoodRx website (https://www.goodrx.com/). Actual charges to patients, of course, may vary widely depending on contractual relationships between hospitals, insurance companies, and wholesale vendors. The infections are listed in alphabetical order, not in order of frequency or severity.

1. Bacterial vaginosis

Bacterial vaginosis (BV) is a polymicrobial infection that results from perturbation of the normal vaginal flora due to conditions such as pregnancy, hormonal therapy, and changes in the menstrual cycle. It is characterized by a decrease in the vaginal concentration of Lactobacillus crispatus, followed by an increase in Prevotella bivia, Gardnerella vaginalis, Mobiluncus species, Atopobium vaginae, and Megasphaera type 1.1,2

 

BV is characterized by a thin, white-gray malodorous (fishlike smell) discharge. The vaginal pH is >4.5. Clue cells are apparent on saline microscopy, and the whiff (amine) test is positive when potassium hydroxide is added to a drop of vaginal secretions. Diagnostic accuracy can be improved using one of the new vaginal panel assays such as BD MAX Vaginal Panel (Becton, Dickinson and Company).3

Antibiotic selection

Antibiotic treatment of BV is directed primarily at the anaerobic component of the infection. The preferred treatment is oral metronidazole 500 mg twice daily for 7 days. If the patient cannot tolerate metronidazole, oral clindamycin 300 mg twice daily for 7 days, can be used, although it is more expensive than metronidazole. Topical metronidazole vaginal gel (0.75%), 1 applicatorful daily for 5 days, is effective in treating the local vaginal infection, but it is not effective in preventing systemic complications such as preterm labor, chorioamnionitis, and puerperal endometritis.2 It also is significantly more expensive than the oral formulation of metronidazole. Topical clindamycin cream, 1 applicatorful daily for 5 days, is even more expensive.

Tinidazole 2 g orally daily for 2 days is an effective alternative to oral metronidazole. Single-dose therapy with oral secnidazole (2 g), a 5-nitroimidazole with a longer half-life than metronidazole, has been effective in small studies, but experience with this drug in the United States is limited. Secnidazole is also very expensive.4

 

2. Candidiasis

Vulvovaginal candidiasis usually is caused by Candida albicans. Other less common species include C tropicalis, C glabrata, C auris, C lusitaniae, and C krusei. The most common clinical findings are vulvovaginal pruritus in association with a curdlike white vaginal discharge. The diagnosis can be established by confirmation of a normal vaginal pH and identification of budding yeast and hyphae on a potassium hydroxide preparation. As noted above for BV, the vaginal panel assay improves the accuracy of clinical diagnosis.3 Culture usually is indicated only in patients with infections that are refractory to therapy.

Continue to: Antibiotic selection...

 

 

Antibiotic selection

In the first trimester of pregnancy, vulvovaginal candidiasis should be treated with a topical medication such as clotrimazole cream 1% (50 mg intravaginally daily for 7 days), miconazole cream 2% (100 mg intravaginally daily for 7 days), or terconazole cream 0.4% (50 g intravaginally daily for 7 days). Single-dose formulations or 3-day courses of treatment may not be quite as effective in pregnant patients, but they do offer a more convenient dosing schedule.2,5

Oral fluconazole should not be used in the first trimester of pregnancy because it has been associated with an increased risk for spontaneous abortion and with fetal cardiac septal defects. Beyond the first trimester, oral fluconazole offers an attractive option for treatment of vulvovaginal candidiasis. The appropriate dose is 150 mg initially, with a repeat dose in 3 days if symptoms persist.2,5

Ibrexafungerp (300 mg twice daily for 1 day) was recently approved by the US Food and Drug Administration (FDA) for oral treatment of vulvovaginal candidiasis. However, this drug is teratogenic and is contraindicated during pregnancy and lactation. It also is significantly more expensive than fluconazole.6

3. Cesarean delivery prophylaxis

All women having a cesarean delivery (CD) should receive antibiotic prophylaxis to reduce the risk of endometritis and wound infection.

 

Antibiotic selection

In my opinion, the preferred regimen is intravenous cefazolin 2 g plus azithromycin 500 mg administered preoperatively.7 Cefazolin can be administered in a rapid bolus; azithromycin should be administered over 1 hour.

In an exceptionally rigorous investigation called the C/SOAP trial (Cesarean Section Optimal Antibiotic Prophylaxis trial), Tita and colleagues showed that the combination of cefazolin plus azithromycin was superior to single-agent prophylaxis (usually with cefazolin) in preventing the composite of endometritis, wound infection, or other infection occurring within 6 weeks of surgery.8 The additive effect of azithromycin was particularly pronounced in patients having CD after labor and rupture of membranes. Harper and associates subsequently validated the cost-effectiveness of this combination regimen using a decision analytic model.9

If the patient has a serious allergy to β-lactam antibiotics, the best alternative regimen for prophylaxis is clindamycin plus gentamicin. The appropriate single intravenous dose of clindamycin is 900 mg; the single dose of gentamicin should be 5 mg/kg of ideal body weight (IBW).7

4. Chlamydia

Chlamydia trachomatis is an obligate intracellular bacterium. In pregnant women, it typically causes urethritis, endocervicitis, and inflammatory proctitis. Along with gonorrhea, it is the cause of an unusual infection/inflammation of the liver capsule, termed Fitz-Hugh-Curtis syndrome (perihepatitis). The diagnosis of chlamydia infection is best confirmed with a nucleic acid amplification test (NAAT). The NAAT simultaneously tests for chlamydia and gonorrhea in urine or in secretions obtained from the urethra, endocervix, and rectum.2

Antibiotic selection

The drug of choice for treating chlamydia in pregnancy is azithromycin 1,000 mg orally in a single dose. Erythromycin can be used as an alternative to azithromycin, but it usually is not well tolerated because of gastrointestinal adverse effects. In my practice, the preferred alternative for a patient who cannot tolerate azithromycin is amoxicillin 500 mg orally 3 times daily for 7 days.2,10

Continue to: 5. Chorioamnionitis...

 

 

5. Chorioamnionitis

Chorioamnionitis is a polymicrobial infection caused by anaerobes, aerobic gram-negative bacilli (predominantly Escherichia coli), and aerobic gram-positive cocci (primarily group B streptococci [GBS]). The diagnosis usually is made based on clinical examination: maternal fever, maternal and fetal tachycardia, and no other localizing sign of infection. The diagnosis can be confirmed by obtaining a sample of amniotic fluid via amniocentesis or via aspiration through the intrauterine pressure catheter and demonstrating a positive Gram stain, low glucose concentration (<20 mg/dL), positive nitrites, positive leukocyte esterase, and ultimately, a positive bacteriologic culture.2

Antibiotic selection

The initial treatment of chorioamnionitis specifically targets the 2 major organisms that cause neonatal pneumonia, meningitis, and sepsis: GBS and E coli. For many years, the drugs of choice have been intravenous ampicillin (2 g every 6 hours) plus intravenous gentamicin (5 mg/kg of IBW every 24 hours). Gentamicin also can be administered intravenously at a dose of 1.5 mg/kg every 8 hours. I prefer the once-daily dosing for 3 reasons:

  • Gentamicin works by a concentration-dependent mechanism; the higher the initial serum concentration, the better the killing effect.
  • Once-daily dosing preserves long periods with low trough levels, an effect that minimizes ototoxicity and nephrotoxicity.
  • Once-daily dosing is more convenient.

In a patient who has a contraindication to use of an aminoglycoside, aztreonam (2 g intravenously every 8 hours) may be combined with ampicillin.2

If the patient delivers vaginally, 1 dose of each drug should be administered postpartum, and then the antibiotics should be discontinued. If the patient delivers by cesarean, a single dose of a medication with strong anaerobic coverage should be administered immediately after the infant’s umbilical cord is clamped. Options include clindamycin (900 mg intravenously) or metronidazole (500 mg intravenously).11

There are 2 key exceptions to the single postpartum dose rule, however. If the patient is obese (body mass index [BMI] >30 kg/m2) or if the membranes have been ruptured for more than 24 hours, antibiotics should be continued until she has been afebrile and asymptomatic for 24 hours.12

Two single agents are excellent alternatives to the combination ampicillin-gentamicin regimen. One is ampicillin-sulbactam, 3 g intravenously every 6 hours. The other is piperacillin-tazobactam, 3.375 g intravenously every 6 hours. These extended-spectrum penicillins provide exceptionally good coverage against the major pathogens that cause chorioamnionitis. Although more expensive than the combination regimen, they avoid the potential ototoxicity and nephrotoxicity associated with gentamicin.2

6. Endometritis

Puerperal endometritis is significantly more common after CD than after vaginal delivery. The infection is polymicrobial, and the principal pathogens are anaerobic gram-positive cocci, anaerobic gram-negative bacilli, aerobic gram-negative bacilli, and aerobic gram-positive cocci. The diagnosis usually is made almost exclusively based on clinical findings: fever within 24 to 36 hours of delivery, tachycardia, mild tachypnea, and lower abdominal/pelvic pain and tenderness in the absence of any other localizing sign of infection.13

Antibiotic selection

Effective treatment of endometritis requires administration of antibiotics that provide coverage against the broad range of pelvic pathogens. For many years, the gold standard of treatment has been the combination regimens of clindamycin plus gentamicin or metronidazole plus ampicillin plus gentamicin. These drugs are available in generic form and are relatively inexpensive. However, several broad-spectrum single agents are now available for treatment of endometritis. Although they are moderately more expensive than the generic combination regimens, they usually are very well tolerated, and they avoid the potential nephrotoxicity and ototoxicity associated with gentamicin. TABLE 1 summarizes the dosing regimens of these various agents and their potential weaknesses in coverage.2,13

7. Gonorrhea

Gonorrhea is caused by the gram-negative diplococcus, Neisseria gonorrhoeae. The organism has a propensity to infect columnar epithelium and uroepithelium, and, typically, it causes a localized infection of the urethra, endocervix, and rectum. The organism also can cause an oropharyngeal infection, a disseminated infection (most commonly manifested by dermatitis and arthritis), and perihepatitis.

The diagnosis is best confirmed by a NAAT that can simultaneously test for gonorrhea and chlamydia in urine or in secretions obtained from the urethra, endocervix, and rectum.2,10

Antibiotic selection

The drugs of choice for treating uncomplicated gonococcal infection in pregnancy are a single dose of ceftriaxone 500 mg intramuscularly, or cefixime 800 mg orally. If the patient is allergic to β-lactam antibiotics, the recommended treatment is gentamicin 240 mg intramuscularly in a single dose, combined with azithromycin 2,000 mg orally.14

8. Group B streptococci prophylaxis

The first-line agents for GBS prophylaxis are penicillin and ampicillin. Resistance of GBS to either of these antibiotics is extremely rare. The appropriate penicillin dose is 3 million U intravenously every 4 hours; the intravenous dose of ampicillin is 2 g initially, then 1 g every 4 hours. I prefer penicillin for prophylaxis because it has a narrower spectrum of activity and is less likely to cause antibiotic-associated diarrhea. The antibiotic should be continued until delivery of the neonate.2,15,16

If the patient has a mild allergy to penicillin, the drug of choice is cefazolin 2 g intravenously initially, then 1 g every 8 hours. If the patient’s allergy to β-lactam antibiotics is severe, the alternative agents are vancomycin (20 mg/kg intravenously every 8 hours infused over 1–2 hours; maximum single dose of 2 g) and clindamycin (900 mg intravenously every 8 hours). The latter drug should be used only if sensitivity testing has confirmed that the GBS strain is sensitive to clindamycin. Resistance to clindamycin usually ranges from 10% to 15%.2,15,16

9. Puerperal mastitis

The principal microorganisms that cause puerperal mastitis are the aerobic streptococci and staphylococci that form part of the normal skin flora. The diagnosis usually is made based on the characteristic clinical findings: erythema, tenderness, and warmth in an area of the breast accompanied by a purulent nipple discharge and fever and chills. The vast majority of cases can be treated with oral antibiotics on an outpatient basis. The key indications for hospitalization are severe illness, particularly in an immunocompromised patient, and suspicion of a breast abscess.2

Continue to: Antibiotic selection...

 

 

Antibiotic selection

The initial drug of choice for treatment of mastitis is dicloxacillin sodium 500 mg every 6 hours for 7 to 10 days. If the patient has a mild allergy to penicillin, the appropriate alternative is cephalexin 500 mg every 8 hours for 7 to 10 days. If the patient’s allergy to penicillin is severe, 2 alternatives are possible. One is clindamycin 300 mg twice daily for 7 to 10 days; the other is trimethoprim-sulfamethoxazole double strength (800 mg/160 mg), twice daily for 7 to 10 days. The latter 2 drugs are also of great value if the patient fails to respond to initial therapy and/or infection with methicillin-resistant Staphylococcus aureus (MRSA) is suspected.2 I prefer the latter agent because it is less expensive than clindamycin and is less likely to cause antibiotic-induced diarrhea.

If hospitalization is required, the drug of choice is intravenous vancomycin. The appropriate dosage is 20 mg/kg every 8 to 12 hours (maximum single dose of 2 g).2

10. Syphilis

Syphilis is caused by the spirochete bacterium, Treponema pallidum. The diagnosis can be made by clinical examination if the characteristic findings listed in TABLE 2 are present.2,17 However, most patients in our practice will have latent syphilis, and the diagnosis must be established based on serologic screening.17

Antibiotic selection

In pregnancy, the treatment of choice for syphilis is penicillin (TABLE 3).2,10,17 Only penicillin has been proven effective in treating both maternal and fetal infection. If the patient has a history of allergy to penicillin, she should undergo skin testing to determine if she is truly allergic. If hypersensitivity is confirmed, the patient should be desensitized and then treated with the appropriate regimen outlined in TABLE 3. Of interest, within a short period of time after treatment, the patient’s sensitivity to penicillin will be reestablished, and she should not be treated again with penicillin unless she undergoes another desensitization process.2,17

 

11. Trichomoniasis

Trichomoniasis is caused by the flagellated protozoan, Trichomonas vaginalis. The condition is characterized by a distinct yellowish-green vaginal discharge. The vaginal pH is >4.5, and motile flagellated organisms are easily visualized on saline microscopy. The vaginal panel assay also is a valuable diagnostic test.3

Antibiotic selection

The drug of choice for trichomoniasis is oral metronidazole 500 mg twice daily for 7 days. The patient’s sexual partner(s) should be treated concurrently to prevent reinfection. Most treatment failures are due to poor compliance with therapy on the part of either the patient or her partner(s); true drug resistance is uncommon. When antibiotic resistance is strongly suspected, the patient may be treated with a single 2-g oral dose of tinidazole.2

12. Urinary tract infections

Urethritis

Acute urethritis usually is caused by C trachomatis or N gonorrhoeae. The treatment of infections with these 2 organisms is discussed above.

Asymptomatic bacteriuria and acute cystitis

Bladder infections are caused primarily by E coli, Klebsiella pneumoniae, and Proteus species. Gram-positive cocci such as enterococci, Staphylococcus saprophyticus, and GBS are less common pathogens.18

The key diagnostic criterion for asymptomatic bacteriuria is a colony count greater than 100,000 organisms/mL of a single uropathogen on a clean-catch midstream urine specimen.18

The usual clinical manifestations of acute cystitis include frequency, urgency, hesitancy, suprapubic discomfort, and a low-grade fever. The diagnosis is most effectively confirmed by obtaining urine by catheterization and demonstrating a positive nitrite and positive leukocyte esterase reaction on dipstick examination. The finding of a urine pH of 8 or greater usually indicates an infection caused by Proteus species. When urine is obtained by catheterization, the criterion for defining a positive culture is greater than 100 colonies/mL.18

Antibiotic selection. In the first trimester, the preferred agents for treatment of a lower urinary tract infection are oral amoxicillin (875 mg twice daily) or cephalexin (500 mg every 8 hours). For an initial infection, a 3-day course of therapy usually is adequate. For a recurrent infection, a 7- to 10-day course is indicated.

Beyond the first trimester, nitrofurantoin monohydrate macrocrystals (100 mg orally twice daily) or trimethoprim-sulfamethoxazole double strength (800 mg/160 mg twice daily) are the preferred agents. Unless no other oral drug is likely to be effective, these 2 drugs should be avoided in the first trimester. The former has been associated with eye, heart, and cleft defects. The latter has been associated with neural tube defects, cardiac anomalies, choanal atresia, and diaphragmatic hernia.18

Acute pyelonephritis

Acute infections of the kidney usually are caused by the aerobic gram-negative bacilli: E coli, K pneumoniae, and Proteus species. Enterococci, S saprophyticus, and GBS are less likely to cause upper tract infection as opposed to bladder infection.

The typical clinical manifestations of acute pyelonephritis include high fever and chills in association with flank pain and tenderness. The diagnosis is best confirmed by obtaining urine by catheterization and documenting the presence of a positive nitrite and leukocyte esterase reaction. Again, an elevated urine pH is indicative of an infection secondary to Proteus species. The criterion for defining a positive culture from catheterized urine is greater than 100 colonies/mL.2,18

Antibiotic selection. Patients in the first half of pregnancy who are hemodynamically stable and who show no signs of preterm labor may be treated with oral antibiotics as outpatients. The 2 drugs of choice are amoxicillin-clavulanate (875 mg twice daily for 7 to 10 days) or trimethoprim-sulfamethoxazole double strength (800 mg/160 mg twice daily for 7 to 10 days).

For unstable patients in the first half of pregnancy and for essentially all patients in the second half of pregnancy, parenteral treatment should be administered on an inpatient basis. My preference for treatment is ceftriaxone, 2 g intravenously every 24 hours. The drug provides excellent coverage against almost all the uropathogens. It has a convenient dosing schedule, and it usually is very well tolerated. Parenteral therapy should be continued until the patient has been afebrile and asymptomatic for 24 to 48 hours. At this point, the patient can be transitioned to one of the oral regimens listed above and managed as an outpatient. If the patient is allergic to β-lactam antibiotics, an excellent alternative is aztreonam, 2 g intravenously every 8 hours.2,18

References
  1. Reeder CF, Duff P. A case of BV during pregnancy: best management approach. OBG Manag. 2021;33(2):38-42.
  2. Duff P. Maternal and perinatal infection in pregnancy: bacterial. In: Landon MB, Galan HL, Jauniaux ERM, et al, eds. Gabbe’s Obstetrics: Normal and Problem Pregnancies, 8th ed. Elsevier; 2021:1124-1145.
  3. Broache M, Cammarata CL, Stonebraker E, et al. Performance of a vaginal panel assay compared with the clinical diagnosis of vaginitis. Obstet Gynecol. 2021;138:853-859.
  4. Hiller SL, Nyirjesy P, Waldbaum AS, et al. Secnidazole treatment of bacterial vaginosis: a randomized controlled trial. Obstet Gynecol. 2017;130:379-386.
  5. Kirkpatrick K, Duff P. Candidiasis: the essentials of diagnosis and treatment. OBG Manag. 2020;32(8):27-29, 34.
  6.  Ibrexafungerp (Brexafemme) for vulvovaginal candidiasis. Med Lett Drugs Ther. 2021;63:141-143.
  7. Duff P. Prevention of infection after cesarean delivery. Clin Obstet Gynecol. 2019;62:758-770.
  8. Tita AT, Szychowski JM, Boggess K, et al; for the C/SOAP Trial Consortium. Adjunctive azithromycin prophylaxis for cesarean delivery. N Engl J Med. 2016;375:1231-1241.
  9. Harper LM, Kilgore M, Szychowski JM, et al. Economic evaluation of adjunctive azithromycin prophylaxis for cesarean delivery. Obstet Gynecol. 2017;130:328-334. 
  10. Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Morbid Mortal Wkly Rep. 2015;64(RR3):1-137.
  11. Edwards RK, Duff P. Single additional dose postpartum therapy for women with chorioamnionitis. Obstet Gynecol. 2003;102(5 pt 1):957-961.
  12. Black LP, Hinson L, Duff P. Limited course of antibiotic treatment for chorioamnionitis. Obstet Gynecol. 2012;119:1102-1105.
  13. Duff P. Fever following cesarean delivery: what are your steps for management? OBG Manag. 2021;33(12):26-30, 35.
  14. St Cyr S, Barbee L, Warkowski KA, et al. Update to CDC’s treatment guidelines for gonococcal infection, 2020. MMWR Morbid Mortal Wkly Rep. 2020;69:1911-1916.
  15. Prevention of group B streptococcal early-onset disease in newborns: ACOG committee opinion summary, number 782. Obstet Gynecol. 2019;134:1.
  16. Duff P. Preventing early-onset group B streptococcal disease in newborns. OBG Manag. 2019;31(12):26, 28-31.
  17. Finley TA, Duff P. Syphilis: cutting risk through primary prevention and prenatal screening. OBG Manag. 2020;32(11):20, 22-27.
  18. Duff P. UTIs in pregnancy: managing urethritis, asymptomatic bacteriuria, cystitis, and pyelonephritis. OBG Manag. 2022;34(1):42-46.
References
  1. Reeder CF, Duff P. A case of BV during pregnancy: best management approach. OBG Manag. 2021;33(2):38-42.
  2. Duff P. Maternal and perinatal infection in pregnancy: bacterial. In: Landon MB, Galan HL, Jauniaux ERM, et al, eds. Gabbe’s Obstetrics: Normal and Problem Pregnancies, 8th ed. Elsevier; 2021:1124-1145.
  3. Broache M, Cammarata CL, Stonebraker E, et al. Performance of a vaginal panel assay compared with the clinical diagnosis of vaginitis. Obstet Gynecol. 2021;138:853-859.
  4. Hiller SL, Nyirjesy P, Waldbaum AS, et al. Secnidazole treatment of bacterial vaginosis: a randomized controlled trial. Obstet Gynecol. 2017;130:379-386.
  5. Kirkpatrick K, Duff P. Candidiasis: the essentials of diagnosis and treatment. OBG Manag. 2020;32(8):27-29, 34.
  6.  Ibrexafungerp (Brexafemme) for vulvovaginal candidiasis. Med Lett Drugs Ther. 2021;63:141-143.
  7. Duff P. Prevention of infection after cesarean delivery. Clin Obstet Gynecol. 2019;62:758-770.
  8. Tita AT, Szychowski JM, Boggess K, et al; for the C/SOAP Trial Consortium. Adjunctive azithromycin prophylaxis for cesarean delivery. N Engl J Med. 2016;375:1231-1241.
  9. Harper LM, Kilgore M, Szychowski JM, et al. Economic evaluation of adjunctive azithromycin prophylaxis for cesarean delivery. Obstet Gynecol. 2017;130:328-334. 
  10. Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Morbid Mortal Wkly Rep. 2015;64(RR3):1-137.
  11. Edwards RK, Duff P. Single additional dose postpartum therapy for women with chorioamnionitis. Obstet Gynecol. 2003;102(5 pt 1):957-961.
  12. Black LP, Hinson L, Duff P. Limited course of antibiotic treatment for chorioamnionitis. Obstet Gynecol. 2012;119:1102-1105.
  13. Duff P. Fever following cesarean delivery: what are your steps for management? OBG Manag. 2021;33(12):26-30, 35.
  14. St Cyr S, Barbee L, Warkowski KA, et al. Update to CDC’s treatment guidelines for gonococcal infection, 2020. MMWR Morbid Mortal Wkly Rep. 2020;69:1911-1916.
  15. Prevention of group B streptococcal early-onset disease in newborns: ACOG committee opinion summary, number 782. Obstet Gynecol. 2019;134:1.
  16. Duff P. Preventing early-onset group B streptococcal disease in newborns. OBG Manag. 2019;31(12):26, 28-31.
  17. Finley TA, Duff P. Syphilis: cutting risk through primary prevention and prenatal screening. OBG Manag. 2020;32(11):20, 22-27.
  18. Duff P. UTIs in pregnancy: managing urethritis, asymptomatic bacteriuria, cystitis, and pyelonephritis. OBG Manag. 2022;34(1):42-46.
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OBG Management - 34(7)
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OBG Management - 34(7)
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40-46
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40-46
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