hypocalcemia, with a false positive rate of 4%. Hence, it does not eliminate the need for blood
By Chvostek’s sign. This test of muscular hyperexcitability is performed by tapping the bone
anterior to the ear, which corresponds to the exit point of cranial nerve VII. The test is positive when it
triggers facial twitching. Chvostek’s sign has low sensitivity for latent tetany (27%), and very high false
positive rates (19–74% in children and 4–29% in adults).