MICROANATOMY

Detailed explanation-1: -Trousseau’s sign refers to the involuntary contraction of the muscles in the hand and wrist (i.e., carpopedal spasm) that occurs after the compression of the upper arm with a blood pressure cuff.

Detailed explanation-2: -A positive sign is characterized by the appearance of a carpopedal spasm which involves flexion of the wrist, thumb, and MCP joints along with hyperextension of the IP joints. This spasm results from the ischemia that is induced by compression through the inflated cuff.

Detailed explanation-3: -Electrolyte Imbalances that Can Lead to a Positive Trousseau’s Sign. Trousseau’s sign can occur during an electrolyte imbalance. Though it can occur with hypomagnesemia (low magnesium levels in the blood), it is primarily associated with hypocalcemia (low calcium levels in the blood).

Detailed explanation-4: -Chvostek’s sign is de-scribed as the twitching of facial muscles in response to tapping over the area of the facial nerve (Video 1). Trousseau’s sign is carpopedal spasm that results from ischemia, such as that induced by pressure applied to the upper arm from an in-flated sphygmomanometer cuff (Video 2).