Vaginal Changes After CO2 Laser

Genitourinary Syndrome of Menopause (GSM) is a broad term that describes symptoms that arise from a physiologic decline in estrogen levels. Although GSM is not a life-threatening condition, it has a negative impact on a woman's quality of life with regards to general health and sexual function. Considering the years after menopause can make up the longest portion of a woman's life, safe and effective therapies to relieve the progressive menopausal symptoms over a long period are needed. Hormone therapy is commonly used to supplement the body's natural estrogen and relieve menopause symptoms. However, safety concerns associated with long-term hormone therapy exists, including the increased risk of blood clots, breast cancer, and endometrial cancer. An alternative treatment approach has been recently proposed for the relief of menopausal symptoms based on an energy-based device. While laser therapy, like CO2 micro-ablation, has demonstrated clear benefits in dermatology, it is a new application in female pelvic medicine with limited long-term follow-up. For benign conditions such as GSM, an invasive biopsy is not indicated and not standard of care. But without histologic information, the complete pathophysiology of GSM and how alternative treatment options such as fractional-CO2 laser therapy may work, remain poorly understood. Thus, a non-invasive tool that can obtain tissue histopathological information before and over the time course of treatment is lacking in the field of pelvic medicine. We have already developed and optimized a vaginal OCT/OCTA/OCE imaging system (HS# 2017-3686) that can be used in women \[9\]. This technology is able to obtain a comprehensive image of the vaginal epithelium, blood vessels, and lamina propria using 1.7 μm or 1.3 μm OCT, OCTA, and OCE. In the HS# 2019-5446 IRB study, we measured the the VET (vaginal epithelium thickness) and BVD (blood vessel density) changes in four vaginal locations: distal anterior and posterior and proximal anterior and posterior at each visit using the OCT device. We saw improvement in the in the mean difference in the VET and BVD at each visit compared to the baseline measurements at visit 1. These measurements reached statistical significance by visit 4. The focus of this study is to compare vaginal laser therapy to a sham group using the objective measurements the OCT device can provide. We expect the vaginal epithelium thickness and blood vessel density to be statistically significantly improved by the fourth follow-up visit after three laser treatments.