Which anatomical structure predisposes patients to SBBO if removed during intestinal resection?

Which anatomical structure predisposes patients to SBBO if removed during intestinal resection?

• A. Ileocecal valve
• B. Pylorus
• C. Duodenum
• D. Appendix

Answer: (A)

The barrier between the small and large intestine governs risk of SBBO after resection. The ileocecal valve acts as a gatekeeper, preventing backflow of colonic bacteria into the small bowel and helping regulate the transit of intestinal contents. When this valve is removed, the protective barrier is lost, allowing colonic bacteria to reflux into the small intestine, proliferate, and cause small-bowel bacterial overgrowth. This overgrowth disrupts nutrient absorption and leads to symptoms like bloating and diarrhea. Removal of other structures such as the pylorus, duodenum, or appendix does not disrupt this specific barrier, so they’re not as strongly linked to SBBO.

The barrier between the small and large intestine governs risk of SBBO after resection. The ileocecal valve acts as a gatekeeper, preventing backflow of colonic bacteria into the small bowel and helping regulate the transit of intestinal contents. When this valve is removed, the protective barrier is lost, allowing colonic bacteria to reflux into the small intestine, proliferate, and cause small-bowel bacterial overgrowth. This overgrowth disrupts nutrient absorption and leads to symptoms like bloating and diarrhea. Removal of other structures such as the pylorus, duodenum, or appendix does not disrupt this specific barrier, so they’re not as strongly linked to SBBO.