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General Surgery · Perioperative: anastomotic leak
Sample itemOn the sixth day after an anterior resection, a man has fever of 38.8 degrees Celsius, tachycardia of 118 per minute, lower abdominal pain, and a raised CRP and white cell count. He has localised tenderness without peritonism and is haemodynamically stable. What is the most appropriate investigation?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. CT of the abdomen and pelvis with intravenous and rectal contrast
Anastomotic leak typically presents between the fifth and seventh postoperative days with fever, tachycardia, ileus and rising inflammatory markers. In a stable patient without peritonitis, contrast CT confirms the leak and any collection and guides percutaneous drainage or surgery. Generalised peritonitis or instability needs laparotomy without delay.
Option by option
A. CT of the abdomen and pelvis with intravenous and rectal contrast (correct)
Contrast-enhanced CT identifies leakage and collections in a stable patient.
B. Repeat blood tests in 48 hours
Waiting 48 hours delays diagnosis and increases the risk of sepsis.
C. Plain abdominal radiograph
Plain films are insensitive and cannot demonstrate a leak or collection.
D. Immediate re-laparotomy without imaging
Re-laparotomy without imaging is for peritonitis or instability, which are absent here.
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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