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Published on 04/05/2015 by admin

Filed under Gastroenterology and Hepatology

Last modified 04/05/2015

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History: A 71-year-old woman presents with melena, nausea, vomiting, and abdominal pain.

1. What is the minimal amount of free intraperitoneal gas visible on an upright chest film?

B. Approximately 5 mL

D. Approximately 50 mL

E. 100 to 150 mL

2. What is Rigler’s sign?

A. A differential diagnosis for free intraperitoneal gas due to a loop of bowel interposed between the liver and the right diaphragm.

B. A sign of free intraperitoneal gas on a supine abdominal radiograph where both sides of the bowel wall are visible owing to gas on both sides.

C. A sign of free intraperitoneal gas on a supine abdominal radiograph where the inferior surface of the central tendon of the diaphragm is visible.

D. A sign of free intraperitoneal gas on a supine abdominal radiograph where there is an oval central lucency.

3. What imaging procedure is best for demonstrating free intraperitoneal gas?

A. Abdominal radiograph, erect

B. Abdominal radiograph, left decubitus

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