- Key radiological features of small bowel obstruction are dilated bowel loops that are central, contain valvulae conniventes, and are pliable (“bent finger”).
- Adhesions (postoperative): 50–80%
- Hernias (external): 5–15%
- Malignancy (peritoneal): 5–15%
- Crohn disease: <7%
- Bowel wall lesions (causing intussusception)
- Intraluminal mass: foreign body, gallstone ileus
- Extrinsic inflammatory lesions (appendiceal)
- Internal hernia
References and Links
Textbooks and Journal Articles
- Schwartz DT, Reisdorff EJ. Emergency Radiology, McGraw-Hill 2000.
- Talley NJ, O’Connor S. Clinical Examination: A Systematic Guide to Physical Diagnosis. MacLennan and Petty. 3rd edition, 1998.