Risk of Outlet Obstruction Associated With Defunctioning Loop Ileostomy in Rectal Cancer Surgery.

Abstract

The outlet obstruction (OO) rate is 5.4-18.4% after defunctioning ileostomy (DI) following rectal cancer resection to reduce the incidence and severity of anastomotic leakage; OO affects a patient's quality of life and prolongs hospitalization. A retrospective analysis was performed of patients who underwent anterior rectal resection and DI for rectal cancer. Among 100 patients undergoing anterior rectal resection with DI for rectal cancer, 28 (28%) developed OO. Anastomotic leakage and a rectus abdominis muscle thickness ≥10 mm on preoperative computed tomography were significantly associated with the risk of OO in univariate analysis. Multivariate analysis also demonstrated that anastomotic leakage (odds ratio=4.320, 95% confidence interval=1.280-14.60, p=0.019) and rectus abdominis muscle thickness ≥10 mm (odds ratio=3.710, 95% confidence intervaI=1.280-10.70, p=0.016) were significantly risk factors for OO. When OO is observed, an anastomotic leakage should be suspected, especially if there is a high rectus abdominis muscle thickness.