Defunctioning loop ileostomy is performed after low anterior resection primarily to:
- A Reduce the severity of consequences if an anastomotic leak occurs ✓
- B Prevent anastomotic leak by diverting all fecal load
- C Protect the urological anastomosis from contamination
- D Allow radiotherapy to the pelvis without bowel injury
Correct answer: A. Reduce the severity of consequences if an anastomotic leak occurs
Explanation
A defunctioning loop ileostomy does not prevent anastomotic leak — the incidence remains the same — but it significantly reduces the clinical severity if a leak does occur. By diverting fecal stream, it prevents fecal peritonitis and reduces the likelihood that a leak will require emergency Hartmann's procedure. Leak rates after low anterior resection remain 5–15% regardless of stoma; the stoma allows the majority of leaks to be managed conservatively. Stoma reversal is typically planned at 8–12 weeks.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.