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General Surgery · Gastrointestinal surgery: oesophagectomy complications
Sample itemOn day 5 after a transthoracic oesophagectomy, a patient on enteral feeds drains 1.2 litres a day of milky fluid from the chest tube. The fluid has a high triglyceride content. Which structure was injured?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Thoracic duct
Milky pleural fluid rich in triglycerides after oesophagectomy indicates a chyle leak from the thoracic duct. Management is drainage, a low-fat or fasted diet with parenteral nutrition, and ligation if the output stays high. Nerve injury causes hoarseness, not a milky effusion.
Option by option
A. Thoracic duct (correct)
Correct. The thoracic duct carries chyle through the posterior mediastinum.
B. Recurrent laryngeal nerve
The recurrent laryngeal nerve injury gives hoarseness and aspiration.
C. Azygos vein
Azygos injury causes venous bleeding, not milky fluid.
D. Left main bronchus
A bronchial injury causes an air leak, not chyle.
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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