Trousseau's sign....Detection of latent tetany/Hypocalcaemia

Indication:
Detection of latent tetany/ Hypocalcaemia

Trousseau sign of latent tetany is a medical sign observed in patients with low calcium. From 1 to 4 percent of normal patients will test positive for Trousseau's sign of latent tetany.This sign may be positive before other manifestations of hypocalcemia such as hyperreflexia and tetany, as such it is generally believed to be more  sensitive  (94%) than the Chvostek sign (29%) for hypocalcemia.

Procedure:
Inflation of a sphygmomanometer cuff on the upper arm to more than systolic blood pressure is followed by carpal spasm within 3 minutes.