Signs and Evidence

Making clinical sense of scientific data


Beware of the limitations of this tool

Small bowel obstruction

Calculated pretest probability: 0.7 %
Relevant inclusion criteria: Acute abdominal pain 


2Abdominal pain

Clinical signs

4Rebound tenderness
5Bowel sounds increased
6Bowel sound decreased
7Abdominal Mass

Sources used:

1.Bohner H et al. Simple data from history and physical examination help to exclude bowel obstruction and to avoid radiographic studies in patients with acute abdominal pain. Eur J Surg. 1998 Oct;164(10):777-84
2.Cervellin G et al. Epidemiology and outcomes of acute abdominal pain in a large urban Emergency Department: retrospective analysis of 5,340 cases. Ann Transl Med. 2016 Oct; 4(19): 362