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What are the Chvostek’s and Trousseau’s signs and what do they mean?

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Chvostek’s sign and Trousseau’s sign are tests for neuromuscular irritability. Chvostek’s sign is elicited by tapping the facial nerve 2 cm anterior to the earlobe. A positive response is ipsilateral (same side) twitching of the facial muscles. Trousseau’s sign is elicited by placing a blood pressure cuff on the arm, inflating the cuff slightly above the systolic pressure, leaving the cuff inflated 2 to 3 minutes, and deflating. A carpal spasm is a positive response. A positive Chvostek’s sign and Trousseau’s sign indicate hypocalcemia or hypomagnesemia. more
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