Latent tetany, Chvostek and Trousseau signs. Osama SM Amin FACP & Sa'ad S Shwani MD, 2011

In patients with hypocalcemia, these signs (of latent tetany) may be positive before patients develop the fully-fledged picture of hypocalcemia. Trousseau's sign is more sensitive than the facial twitchings of Chvostek (94% versus 29%).