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General Surgery · Vascular surgery: mesenteric venous thrombosis
Sample itemA 30-year-old woman on oral contraceptives has two days of worsening abdominal pain out of proportion to examination and a mildly raised lactate. Contrast CT shows a thrombosed superior mesenteric vein and thickened oedematous ileum, with no free air. What is the first treatment?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Immediate systemic anticoagulation with heparin
Mesenteric venous thrombosis is treated by prompt heparin, which prevents clot extension and bowel infarction. Laparotomy and resection are reserved for peritonitis or non-viable bowel.
Option by option
A. Immediate systemic anticoagulation with heparin (correct)
Correct. Heparin is the cornerstone of treatment for mesenteric venous thrombosis.
B. Emergency thrombolysis via the arterial route only
Arterial thrombolysis is for arterial occlusion.
C. Immediate small bowel resection for all patients
Resection is only needed if infarction or peritonitis develops.
D. Antiplatelet therapy with aspirin
Aspirin is not an adequate treatment for an established venous thrombus.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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