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General Surgery · Endocrine surgery: parathyroid
Sample itemAfter parathyroid surgery, a patient has perioral tingling, carpopedal spasm, and a prolonged QT interval. What is the most likely metabolic disturbance?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Hypocalcemia
Hypocalcemia can occur after parathyroid or thyroid surgery and causes neuromuscular excitability, paresthesias, tetany, and QT prolongation. Severity and symptoms guide urgent calcium replacement.
Option by option
A. Hypermagnesemia
Hypermagnesemia causes reduced reflexes and weakness rather than tetany.
B. Hyperkalemia
Hyperkalemia more often produces peaked T waves and conduction abnormalities.
C. Hypocalcemia (correct)
Correct. Tingling, tetany, and QT prolongation are classic hypocalcemic features.
D. Hypernatremia
Hypernatremia causes water-deficit symptoms, not carpopedal spasm.
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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