This document discusses adynamic ileus and provides 5 figures illustrating examples. Adynamic ileus is a paralytic obstruction of the bowel without mechanical blockage. Figure 1 shows an adynamic ileus pattern. Figure 2 highlights a sentinel loop in a patient with acute pancreatitis. Figure 3 depicts colonic ileus in a patient with severe diabetes and hypokalemia. Figure 4 exhibits chronic idiopathic intestinal pseudo-obstruction resembling mechanical obstruction. Figure 5 shows acute intermittent porphyria mimicking mechanical obstruction on supine and upright views.

1. 22Adynamic Ileus*

2. CLINICAL IMAGAGING
AN ATLAS OF DIFFERENTIAL DAIGNOSIS
EISENBERG
DR. Muhammad Bin Zulfiqar
PGR-FCPS III SIMS/SHL

3. • Fig GI 22-1 Adynamic ileus pattern.

4. • Fig GI 22-2 Sentinel loop (arrow) in a patient
with acute pancreatitis.

5. • Fig GI 22-3 Colonic ileus in a patient with
severe diabetes and hypokalemia.

6. • Fig GI 22-4 Chronic idiopathic intestinal pseudo-
obstruction. The diffuse small bowel dilatation
simulates mechanical obstruction.27

7. • Fig GI 22-5 Acute intermittent porphyria.
Adynamic ileus simulating mechanical
obstruction on (A) supine and (B) upright
views.