Stapled transperineal repair for low- and mid-level rectovaginal fistulas: A 5-year experience and comparison with sutured repair

Abstract

Background: Currently, rectovaginal fistula (RVF) continues to be a surgical challenge worldwide, with a relatively low healing rate. Unclosed intermittent suture and poor suture materials may be the main reasons for this.

Aim: To evaluate the efficacy and safety of stapled transperineal repair in treating RVF.

Methods: This was a retrospective cohort study conducted in the Coloproctology Department of The Sixth Affiliated Hospital of Sun Yat-sen University (Guangzhou, China). Adult patients presenting with RVF who were surgically managed by perineal repair between May 2015 and May 2020 were included. Among the 82 total patients, 37 underwent repair with direct suturing and 45 underwent repair with stapling. Patient demographic data, Wexner faecal incontinence score, and operative data were analyzed. Recurrence rate and associated risk factors were assessed.

Results: The direct suture and stapled repair groups showed similar clinical characteristics for aetiology, surgical history, fistula features, and perioperative Wexner score. The stapled repair group did not show superior results over the suture repair group in regard to operative time, blood loss, and hospital stay. However, the stapled repair group showed better postoperative Wexner score (1.04 ± 1.89 vs 2.73 ± 3.75, P = 0.021), less intercourse pain (1/45 vs 17/37, P = 0.045), and lower recurrence rate (6/45 vs 17/37, P = 0.001). There was no protective effect from previous repair history, smaller diameter of fistula (< 0.5 cm), better control of defecation (Wexner < 10), or stapled repair. Direct suture repair and preoperative high Wexner score (> 10) were risk factors for fistula recurrence. Furthermore, stapled repair gave better efficacy in treating complex RVFs (i.e., multiple transperineal repair history, mid-level fistula position, and poor control of defecation).

Conclusion: Stapled transperineal repair is advantageous for management of RVF, providing a high primary healing rate and low recurrence rate.

Keywords: Rectovaginal fistula; Recurrence; Stapled technique; Surgical repair; Transperineal approach.