As more and more gynecologic therapies move to the outpatient setting, keeping up on the latest data regarding emerging options can be challenging. Furthermore, it can be difficult to justify purchasing expensive equipment for the office when a therapy is not covered by medical insurance plans. However, if a therapy is efficacious and patients are willing to pay out of pocket, clinicians may want to have these options available for their patients.
In an effort to work through these complex issues, a panel of experts was convened at the 47th Annual Scientific Meeting of the Society of Gynecologic Surgeons in Palm Springs, California, on June 29, 2021. This article includes the salient points from that panel discussion.
Fractionated CO2 laser therapy
Fractionated CO2 laser therapy is considered second-line therapy for the treatment of genitourinary syndrome of menopause (GSM). In 2018, the US Food and Drug Administration (FDA) issued a safety warning about the use of CO2 laser therapy and warned patients and clinicians that the FDA had not approved the treatment for vaginal rejuvenation or treatment of vaginal symptoms related to menopause, urinary incontinence, or sexual function. Despite this warning, laser treatments are still performed in many practices.
In 2019, the International Continence Society (ICS) and the International Society for the Study of Vulvovaginal Disease (ISSVD) put out a joint practice consensus statement that essentially did not recommend the routine use of laser treatment for GSM, urinary incontinence, or lichen sclerosus.1 Conversely, the 2020 American Urogynecologic Society (AUGS) published a clinical consensus statement that spoke to the promising results of laser therapy for the treatment of vulvovaginal atrophy, vaginal dryness, and menopausal dyspareunia, with benefits lasting up to 1 year.2 This statement also suggested that the short-term safety profile of the CO2 laser device was favorable.
How CO2 lasers work
Fractionated CO2 laser therapy differs from unfractionated treatment (which often is used in the treatment of condyloma) in that it is not ablative. The laser works by using fractionated beams of light to penetrate the affected tissue to create small wounds in the epithelium and underlying lamina propria, which leads to collagen remodeling and regeneration that then results in the restoration of the superficial epithelium, vaginal rugae, and lubrication.3 Most clinicians perform 3 applications of the laser treatment 6 weeks apart, a recommendation that is based on manufacturer-sponsored studies in menopausal women.
Study results of patient outcomes with laser therapy
GSM. Several retrospective4,5 and prospective studies6-10 have looked at short- and longer-term outcomes in patients undergoing treatment with the CO2 laser. All of these studies showed improvement in patient symptoms related to GSM.
The VeLVET trial, conducted by Paraiso and colleagues, was a randomized trial that compared CO2 laser treatment with vaginal estrogen in women with GSM.11 While the study was underpowered due to cessation of enrollment once the FDA safety warning was issued, the authors reported that at 6 months, both the fractionated CO2 laser therapy group and the vaginal estrogen group had similar improvements, with 70% to 80% of participants reporting satisfaction with treatment. The authors concluded that laser therapy is likely to be as efficacious as vaginal estrogen and may be a good option for patients who cannot use vaginal estrogen to treat GSM.11
Lichen sclerosus. Some data exist on the efficacy of laser therapy for the treatment of lichen sclerosus. One recently published randomized trial showed that at 6 months, fractionated CO2 laser treatment and prior treatment with high potency topical corticosteroids was associated with higher improvement in subjective symptoms and objective measures compared with clobetasol propionate treatment.12 Another trial, however, revealed that laser treatment was not an effective monotherapy treatment for lichen sclerosus when compared with placebo.13 Fewer studies have examined the effect of laser therapy on urinary incontinence.
More prospective data are emerging, evidenced by trials currently registered in ClinicalTrials.gov. While some studies provide evidence that laser therapy may be efficacious in the treatment of vulvovaginal atrophy, additional data are needed to confirm the favorable outcomes observed with laser therapy for the treatment of lichen sclerosus, and a significant amount of data are needed to evaluate the efficacy of laser treatment for urinary incontinence.
Until such evidence is available, fractionated CO2 vaginal laser therapy will remain a fee-for-service treatment option and will be inaccessible to patients who cannot afford the cost of treatment.
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