Trousseau's Sign: Sensitivity and Specificity
"Most simply described, Trousseau’s sign presents as carpopedal spasm occurring after a few minutes of inflation of a sphygmomanometer cuff above systolic blood
pressure. Occlusion of the brachial artery causes flexion of the wrist and metacarpophalangeal joints, hyperextension of the fingers, and flexion of the thumb on the palm, producing the characteristic posture called main d’accoucheur."
94% sensitive, 99% specific