PAEA Surgery End Of Rotation (EOR) Practice Exam

Which of the following is NOT a cause of small bowel obstruction?

1. Gallstone ileus

2. Intussusception

3. Peptic ulcer disease

4. Volvulus

The correct answer is: Peptic ulcer disease

Peptic ulcer disease primarily affects the stomach and the upper part of the small intestine (the duodenum) rather than causing mechanical obstruction of the small bowel itself. While peptic ulcers can lead to various complications, such as perforation or bleeding, they do not typically result in an obstructive process. In contrast, gallstone ileus, intussusception, and volvulus are all recognized causes of small bowel obstruction. Gallstone ileus occurs when a gallstone passes into the intestinal tract and lodges in the small intestine, leading to obstruction. Intussusception involves a segment of the intestine telescoping into an adjacent segment, which can block the passage of contents and blood supply. Volvulus refers to a twisting of the intestine on itself, leading to obstruction and potentially ischemia. These conditions are direct causes of physical blockage in the small bowel, unlike peptic ulcer disease, which is unrelated to small bowel obstruction.