What's the name of this sign??
a medical sign observed in patients with low calcium.From 1 to 4 percent of normal patients will test positive for this 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. To elicit the sign, a blood pressure cuff is placed around the arm and inflated to a pressure greater than the systolic blood pressure and held in place for 3 minutes. This will occlude the brachial artery. In the absence of blood flow, the patient's hypocalcemia and subsequent neuromuscular irritability will induce spasm of the muscles of the hand and forearm. The wrist and metacarpophalangeal joints flex, the DIP and PIP joints extend, and the fingersadduct. The sign is also known as main d'accoucheur (French for "hand of theobstetrician") because it supposedly resembles the position of an obstetrician's hand in delivering a baby
