A novel intrauterine device that uses suction to compress the uterus to control postpartum hemorrhage has received high marks for effectiveness and ease of use, researchers say.
Calling this approach “a stroke of brilliance,” and is less risky as well.
“This device can be placed in the uterus within a minute or so and does not need any initial anesthesia and would not be associated with the delay needed for a surgical approach,” Dr. Byrne explained. Dr. Byrne, who was not involved in the study, is chair of the department of obstetrics and gynecology at Santa Clara Valley Medical Center in San Jose, Calif.
To test the efficacy and safety of the device (Jada System, Alydia Health), Mary E. D’Alton, MD, and colleagues conducted a prospective, observational treatment study in 12 U.S. medical centers. They reported their findings in an article published online Sept. 9 in Obstetrics and Gynecology.
“The Jada System (novel intrauterine vacuum-induced hemorrhage-control device) was specifically designed to offer rapid treatment by applying low-level intrauterine vacuum to facilitate the physiologic forces of uterine contractions to constrict myometrial blood vessels and achieve hemostasis,” Dr. D’Alton, from New York–Presbyterian/Columbia University Irving Medical Center in New York, and colleagues wrote.
“The device had a low rate of adverse events during this study, all of which were expected risks and resolved with treatment without serious clinical sequelae. Investigators, all first-time users of the device, found the system easy to use, which suggests that, after device education and with availability of a quick reference guide outlining steps, there is a minimal learning curve for use,” they added.
Alydia Health, the company that developed the device, funded this study and supported the research staff, who recruited participants and gathered follow-up data on them. On Sept. 9, the U.S. Food and Drug Administration granted 510(k) clearance for the device, according to a company news release.
Effective, safe
The multicenter study included 107 patients (mean age, 29.7 years) with postpartum hemorrhage or abnormal postpartum uterine bleeding, 106 of whom received any study treatment with the device attached to vacuum. More than half (57%) of the participants were White, and just fewer than one-quarter (24%) were Black.
Treatment was successful in 94% (100/106) of participants, with “definitive control of abnormal bleeding” occurring in a median of 3 minutes after attachment to vacuum.
Eight adverse events were judged to have been possibly related to the device or procedure: four cases of endometritis, and one case each of presumed endometritis, bacterial vaginosis, vaginal candidiasis, and disruption of a vaginal laceration repair. The eight adverse events were identified as potential risks, and all resolved without serious clinical consequences.
Thirty-five patients required transfusions of 1-3 U of red blood cells, and five patients required at least 4 U of red blood cells.
Uterine atony most frequent culprit
As many as 80% of postpartum hemorrhages are caused by uterine atony, according to the authors.
Dr. Byrne explained that the uterus is a muscular organ that contains many “spiral arteries” that are “squeezed” by the uterus as it tightens down after childbirth, which prevents them from bleeding excessively.
“With uterine atony, the uterus muscle doesn’t squeeze effectively, and therefore it’s not one or two arteries, it’s hundreds and hundreds of small arteries and capillaries [and] arterioles all bleeding; it’s a wide area of uterus,” he continued.
When medications alone are ineffective at controlling bleeding, tamponade is often added to put outward pressure on the inner wall of the uterus for 12-24 hours. Although tamponade is effective in approximately 87% of atony-related cases of postpartum hemorrhage, the use of outward pressure on the uterine walls “is counterintuitive if the ultimate goal is uterine contraction,” the authors wrote.
Dr. Byrne said he and his colleagues saw this device several years ago, and they felt at the time that it appeared to be “more intuitive to use vacuum to compress the uterus inward compared to the nonetheless valuable and effective Bakri balloon and other techniques that expand the uterus outward.”
The fact that there is no need for prophylactic antibiotics also sets the vacuum device apart from the Bakri balloon, use of which routinely involves administration of prophylactic antibiotics, Dr. Byrne said.
In the current study, 64% of participants were obese, which makes management of postpartum hemorrhage “really challenging” because it’s difficult to effectively massage the uterus through adipose tissue, Dr. Byrne explained. Patients with obesity “also have different hemodynamics for how effectively [injected medications will] be delivered to the uterus,” he added.
“A device like this that could be placed and works so efficiently – even with an obese patient – that’s actually very powerful,” Dr. Byrne said.