Rediversion of the Failing Ileoanal Pouch: First Step in Pouch Salvage?

Abstract

Background: Ileal pouch-anal anastomosis is a technically demanding procedure with many potential complications. Rediversion with an ileostomy is often the first step in pouch salvage; however, it may not be clear if an individual patient will undergo subsequent pouch salvage surgery. We aimed to describe the indications and short- and long-term outcomes of rediversion in our pouch registry.

Methods: We queried our institutional pouch registry for patients who underwent index 2- or 3-stage IPAA and subsequent rediversion at our institution between 1985 and 2022. Pouches constructed elsewhere, rediverted elsewhere, or those patients who underwent pouch salvage/excision without prior rediversion were excluded. Patients were selected for pouch salvage according to the surgeon's discretion.

Results: Overall, 177 patients (3.4% of 5207 index pouches) were rediverted. At index pouch, median patient age was 32 years and 50.8% were women. Diagnoses included ulcerative colitis (86.4%), indeterminate colitis (6.2%), familial adenomatous polyposis (4.0%), and others (3.4%). Median time from prior ileostomy closure to rediversion was 7.2 years. Indications for rediversion were inflammatory in 98 (55.4%) and noninflammatory in 79 (44.6%) patients. After rediversion, 52% underwent pouch salvage, 30% had no further surgery, and 18.1% underwent pouch excision. The 5-year pouch survival rates for inflammatory and noninflammatory indications were 71.5% and 94.5%, respectively (P = .02).

Conclusion: Rediversion of ileoanal pouches is a safe initial strategy to manage failing pouches and is a useful first step in pouch salvage in many patients. Subsequent salvage surgery for noninflammatory indications had a significantly higher pouch salvage rate than those rediverted for inflammatory complications.

Keywords: complications; ileal pouch–anal anastomosis; ileostomy; inflammatory bowel disease; pouch salvage; rediversion; redo IPAA; surgery.