Which of the following is a diagnostic test for acute mesenteric ischemia?

• A. Chemistry panel
• B. CT angiography of the abdomen
• C. Upper endoscopy
• D. Stool test

Answer: (B)

The diagnostic test for acute mesenteric ischemia is CT angiography of the abdomen. This imaging modality is particularly effective in evaluating blood vessels and can reveal arterial occlusions or significant stenosis that may lead to mesenteric ischemia.

CT angiography provides a rapid and non-invasive way to visualize the mesenteric circulation, showing not only the presence of emboli or thrombi in the mesenteric arteries but also assessing the viability of the bowel. Early diagnosis is crucial in acute mesenteric ischemia, as timely intervention can significantly affect patient outcomes.

Other options are not specific for diagnosing acute mesenteric ischemia; for instance, a chemistry panel may provide metabolic information but lacks the specificity needed for vascular or perfusion issues. Upper endoscopy focuses on the upper gastrointestinal tract and does not visualize mesenteric vessels, hence it's not useful for diagnosing ischemia in the mesentery. A stool test may help identify gastrointestinal bleeding or infectious processes, but again, it does not directly assess vascular supply to the bowel. Thus, CT angiography is the most appropriate and specific diagnostic tool for this condition.