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Title: Repeat operation for treatment of persistent pudendal nerve entrapment after pudendal neurolysis.
Author: Hibner M, Castellanos ME, Drachman D, Balducci J.
Journal: J Minim Invasive Gynecol; 2012; 19(3):325-30. PubMed ID: 22305742.
Abstract:
STUDY OBJECTIVES: To describe a new approach to transgluteal pudendal neurolysis and transposition and to review the outcome in 10 patients who underwent repeat operation because of persistent pudendal neuralgia after failing to improve after initial surgical decompression. DESIGN: Retrospective analysis (Canadian Task Force classification II-3). SETTING: Academic chronic pelvic pain practice at St. Joseph's Hospital and Medical Center in Phoenix, Arizona. PATIENTS: Women and men with persistent pudendal neuralgia after undergoing transgluteal pudendal neurolysis and transposition. INTERVENTION: Transgluteal decompression of the pudendal nerve was performed in all 10 patients. In brief, a transgluteal incision was made, and the pudendal nerve was identified via a nerve integrity monitoring system. Adhesiolysis was performed from the piriformis muscle to the distal Alcock canal using a Zeiss NC-4 surgical microscope. The nerve was then enclosed in NeuraWrap Nerve Protector and coated with activated platelet-rich plasma. An ON-Q PainBuster catheter was place along the nerve into the Alcock canal, and 0.5% bupivacaine was infused at 2 mL/hr. The sacrotuberous ligament was repaired using an Achilles or gracillis cadaver ligament. The overlying subcutaneous tissue and skin were then closed. MEASUREMENTS AND MAIN RESULTS: From June 2008 to March 2010, 10 consecutive patients (7 women and 3 men; age range, 29-81 years) underwent repeat operation with transgluteal decompression of the pudendal nerve. Neuropathic pain was unilateral (n = 8) or bilateral (n = 2), in the clitoris or penis (30%), vulva or scrotum (70%), perineum (40%), and rectum (50%). Of the 10 patients, 1 patient was lost to follow-up. Mean follow-up was 23 months. Eight of 9 patients reported global improvement, with 2 patients reporting complete resolution of symptoms. One patient reported no change. Pain, as measured using an 11-point numerical scale, improved from a mean of 7.2 to 4.0 (p = .02), with 5 patients reporting clinically significant improvement (change, ≥2). Comfortable sitting or maximum time that the patient was able to sit without exacerbation of pain improved in 8 patients, with a change in median time of 5 to 45 minutes (p = .008). Change in the ability to sit correlated well with patient-reported global improvement (correlation coefficient, 0.86). No patient experienced worsening of symptoms. CONCLUSION: Patients with persistent pudendal neuralgia after surgical decompression may benefit from repeat operation via our novel approach. Ability to sit correlates well with reported improvement due to surgery.

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