Novel Vaginal Orthosis for Post-Surgical Healing After Vaginal Reconstructive Surgery For Pelvic Organ Prolapse (NOVa Study)

Background/Rationale:

Pelvic Organ Prolapse (POP) is the bulging or herniation of one or more pelvic organs into or out of the vagina. A woman's estimated lifetime risk of POP is 30-50%, with 2-4% of women being symptomatic. Approximately 300,000 women undergo surgical procedures in the United States to repair POP every year. Recurrence rates of POP after native tissue repair utilizing Sacrospinous Ligament Fixation (SSLF) or Uterosacral Ligament Suspension (USLS) vary based on the definition of surgical or anatomic failure used, however a large RCT reports rate of reoperation at 5 years of 8-11.9%.

With the use of the sacrospinous or uterosacral ligaments for apical support, the long axis of the vaginal canal is deflected posteriorly in the pelvis leaving the anterior wall of the vagina vulnerable to receive more of the downward forces produced intra-abdominally during activity and with absolute increases in intra-abdominal pressure. Given this fact, it is not a coincidence that the area of highest recurrence occurs, despite which definition is used, in the anterior vaginal compartment.

Currently, the standard of care for post-operative management in patients who have undergone native tissue pelvic reconstructive surgery is pelvic rest and reduced activity. The Voices for Pelvic Floor Disorders (Voices PFD) in conjunction with the American Urogynecology Society (AUGS) recommend pelvic rest for a minimum of 6 weeks and for activity to "be up and around, but not too active" for the first two weeks, but to increase ambulation and activity as able with guidance from primary surgeon. By the 6-week post-operative visit, most patients are ready to begin to return to normal daily activities, but some may take a longer time-period of reduced activity.

The "wound" healing process following vaginal surgery starts immediately after hemostasis is achieved and the surgery is completed. The first stage is the inflammatory stage, which has rapid onset and reaches maximal reaction within 1-3 days of surgery. This stage is driven by migration of neutrophils and macrophages responding to factors released from the wound site which are responsible for removal of debris and bacteria in order to prepare the site for the second stage of healing, the proliferative stage. The aim of the proliferative stage is to diminish the surgical site tissue area by contraction and fibroplasia, establishing a viable epithelial barrier to activate keratinocytes. This stage is responsible for the closure of the lesion itself, which includes angiogenesis, fibroplasia, and re-epithelialization. These processes begin in the microenvironment of the lesion within the first 48 hours and can unfold up to the 14th day after the onset of the lesion. With the re-epithelization initiated and Type III collagen now deposited, the remodeling stage or wound maturation begins. The ultimate goal of this third and final stage is to restore or achieve the maximal tensile strength of the healing tissue. This is achieved mainly through the degradation of Type III collagen and production of Type 1 collagen.