護理師正在監測一位 4 小時前接受甲狀腺切除術的病人。下列哪項發現最能預示低血鈣的發生？

甲狀腺切除術中若誤傷副甲狀腺，會導致副甲狀腺素（PTH）下降，進而引發低血鈣。Chvostek's sign（輕叩臉部神經引起抽動）和 Trousseau's sign（壓脈帶加壓引起手部抽搐）是低血鈣引發神經肌肉興奮增加的典型體徵。聲音嘶啞通常與喉返神經受損有關。

Hypocalcemia following a thyroidectomy is often caused by accidental removal or damage to the parathyroid glands, leading to decreased parathyroid hormone levels. A positive Chvostek’s sign, characterized by facial muscle twitching when the facial nerve is tapped, is a classic clinical indicator of neuromuscular irritability associated with low calcium levels.

在美國，術後會常規測量 ionized calcium；台灣部分醫院則以總鈣量（Total Calcium）為主。