Uses for PRP in gynecology
In gynecology, dating back to 2007 PRP was shown to facilitate wound healing, when Fanning and colleagues reported PRP applications in gynecologic operative wounds, such as hysterectomies and urogynecologic procedures, to reduce postoperative pain.23 In the last decade, there has been a dramatic increasing trend in the application of PRP injections as an alternative therapy in gynecology to improve intimate health. PRP has been used to treat lichen sclerosus, atrophic vaginitis, SUI, and female sexual dysfunction; however, there is a dearth of studies that compare PRP with traditional therapies.
Runels and colleagues described the effects of localized injections of autologous PRP for the treatment of sexual dysfunction early in 2014.24 Those authors pioneered PRP use in women with dyspareunia and other symptoms related to sexual dysfunction. Women were offered PRP injections into the periurethral area of the Skene glands and the clitoris. Sexual satisfaction and pain were improved but results did not reach statistical significance. The results of this pilot study of 11 patients suggested that PRP injections could perhaps be an effective method to treat certain types of female sexual dysfunction, including desire, arousal, lubrication, and orgasm.
In another pilot study, Long and colleagues looked at the effectiveness of local injection of PRP for treating women with SUI.25 In that study, younger patients with mild severity of SUI had promising results, with up to 75% cured or improved. Results in the older group, with 50% cured or improved, did not reach statistical significance. Other small, limited studies have been conducted under the hypothesis that PRP as an “O-shot” may be a promising treatment that is a safe, effective, nonsurgical, and nonhormonal option for women with dyspareunia from lack of lubrication and related sexual dysfunction, such as decreased libido or arousal.26-29 A pilot study by Behnia-Willison and colleagues demonstrated clinical improvement in PRP use as an alternative to topical steroids for lichen sclerosus.30 Several other studies also have shown efficacy for the treatment of lichen sclerosus.31-34
More evidence of efficacy needed
To date, preliminary studies suggest that PRP holds promise for a host of gynecologic conditions. Since PRP is autologous, there are no significant contraindications, and thus far there have been no known serious adverse effects. However, most health insurers still do not cover this therapy, so for now patients must pay out-of-pocket fees for these treatments.
As we continue to investigate therapies in regenerative medicine, the continued efforts of our discipline are required to conduct well-designed prospective, randomized controlled studies. While initial series suggest that PRP is safe, it is unlikely that this therapy will be embraced widely in the paradigm as an alternative treatment option for many genitourinary symptoms of menopause and vulvar disorders until efficacy is better established.
Radiofrequency therapy
For the past 20 years, radiofrequency (RF) energy has been used through the vagina, urethra, and periurethral tissues for the treatment of genitourinary symptoms, with limited success. More recently, because some patients hesitate to receive mesh implants for treatment of urinary incontinence,35 there has been gravitation to office-based procedures.
In contrast to lasers, which transmit energy through light, RF waves (measured in hertz) transform the kinetic energy of the intracellular atoms, which move and collide, generating thermal energy.36,37 RF therapy has been shown to increase the proportion of smooth muscle and connective tissue; stimulate proliferation of the epithelium, neovascularization, and collagen formation in the lamina propria; and improve natural lubrication.36,38 In addition, RF is:
- ablative when the heat is capable of generating ablation and/or necrosis of the epidermis and dermis
- microablative when energy fractionation produces microscopic columns of ablative thermal lesions in the epidermis and upper dermis, resulting in microscopic columns of treated tissue interspersed with areas of untreated skin,39 and
- nonablative when trauma occurs only in the dermis by heating without causing ablation of the epidermis.39
The RF devices discussed below are used with settings for microablation in the treatment of SUI and sexual health/vaginal laxity, and with nonablative settings in the treatment of GSM.
RF for the treatment of urinary incontinence
Studies with RF have shown its benefits in urinary symptoms as secondary outcomes, such as improvement of SUI.38,40 One theory that favors energy devices as a treatment for SUI is that the treatment strengthens suburethral and pubocervical support, thereby decreasing urethral mobility.41
In 2016, the Viveve system (Viveve) received FDA 510(k) clearance for “use in general surgical procedures for electrocoagulation and hemostasis.” A single-site, randomized, nonblinded pilot study compared 1 treatment (group 1) versus 2 treatments (group 2) with the Viveve system for SUI in 35 participants.42 At 12 months, only for group 2 did mean scores on the Incontinence Impact Questionnaire Short Form (IIQ-7) and the International Consultation on Incontinence Modular Questionnaire-Urinary Incontinence-Short Form (ICIQ-UI-SF) decrease by the minimum clinically important difference of 16 and 2.52 points, respectively, compared with baseline.
The ThermiVa device (ThermiGen, LLC) received FDA clearance for “use in dermatological and general surgical procedures for electrocoagulation and hemostasis” in 2017. A single-site, prospective, double-blind, randomized controlled pilot trial evaluated the efficacy of this device for the treatment of SUI in 20 participants randomly assigned in a 1:1 fashion to active and sham groups.43 At 12 weeks, mean scores of the Urogenital Distress Inventory (UDI-6) and the ICIQ-UI-SF decreased by the minimal clinically important difference only in the treatment group arm. Additionally, 70% of treatment group participants had a negative stress test at 12 weeks compared with 0% of control group participants.43 In another study of 48 patients who were followed longitudinally for 5 months, a substantial improvement in genital appearance was observed.44 Assessment based on validated instruments demonstrated significant improvements in sexual function and SUI.44
A microablative RF device (Wavetronic 6000 Touch Device, Megapulse HF FRAXX system; Loktal Medical Electronics) consists of a vaginal probe with 64 microneedles at the tip, each capable of penetrating to a depth of 1 mm. During activation, delivery of RF energy, which results in vaporization of tissue at 100 °C, occurs in a preset sequence of 8 needles at a time, preventing the overheating of intervening tissue between adjacent needles.
Slongo and colleagues conducted a 3-arm randomized clinical trial that included 117 climacteric women with SUI.45 In group 1, treatment consisted of 3 monthly sessions of RF; group 2 received 12 weekly sessions of pelvic floor muscle training (PFMT); and group 3 received RF treatment plus PFMT simultaneously. Assessments were conducted at baseline and 30 days after the end of therapy using validated questionnaires and scales for urinary, vaginal, and sexual functions, and cytology was used to assess vaginal atrophy. The association between RF and PFMT showed significant improvement in the SUI symptoms assessed by questionnaire. The vaginal symptoms and dryness showed more substantial improvement with the RF treatment, and vaginal laxity showed similar improvement in the 3 treatment groups.45
Continue to: RF for the treatment of GSM...