[CT scanning in suspected ileus or pneumoperitoneum]

Area of Science:

• Radiology
• Abdominal Imaging

Background:

• Bowel obstruction and pneumoperitoneum are critical diagnoses requiring prompt identification.
• Plain abdominal X-rays are a common initial imaging modality for these conditions.

Purpose of the Study:

• To compare the diagnostic accuracy of plain abdominal X-rays and CT scans for suspected bowel obstruction or pneumoperitoneum.
• To determine the optimal primary imaging strategy for these acute abdominal conditions.

Main Methods:

• Prospective survey of 66 consecutive patients with suspected bowel obstruction or pneumoperitoneum.
• Comparison of diagnostic findings between plain abdominal X-rays and supplementary abdominal CT scans.
• Correlation of imaging results with surgical findings in 31 patients.

Main Results:

• CT scans correctly identified all cases of bowel obstruction and pneumoperitoneum.
• Plain abdominal X-rays had one false negative for bowel obstruction and one for pneumoperitoneum.
• Both modalities showed one false positive for bowel obstruction; overall diagnostic performance was similar in most cases.

Conclusions:

• Plain abdominal X-ray should remain the primary imaging modality for suspected bowel obstruction or pneumoperitoneum.
• CT scanning is recommended as a secondary examination when initial plain X-rays are inconclusive but clinical suspicion remains high.