護理師照護一位甲狀腺切除術後 24 小時的病人，發現病人出現肌肉抽動與口周麻木。護理師預期會發現下列哪項檢驗數據異常？
A nurse is caring for a client 24 hours post-thyroidectomy. The nurse notes the client is exhibiting muscle twitching and numbness around the mouth. Which laboratory finding should the nurse anticipate?
- AIncreased serum potassium level血清鉀離子水平升高
- BIncreased serum calcium level血清鈣離子水平升高
- CDecreased serum calcium level✓ 正解血清鈣離子水平降低
- DDecreased serum magnesium level血清鎂離子水平降低
甲狀腺切除術中若誤傷副甲狀腺，會導致副甲狀腺素分泌不足，造成低血鈣。臨床表現包括口周麻木、肢體末梢刺痛以及肌肉抽動（Chvostek's sign 或 Trousseau's sign 陽性）。因此，監測血鈣濃度是術後最重要的風險評估之一。
Inadvertent injury or removal of the parathyroid glands during thyroidectomy leads to hypoparathyroidism and hypocalcemia. Perioral numbness, paresthesias, muscle twitching, and positive Chvostek and Trousseau signs are classic findings of low ionized calcium. Postoperative calcium levels must be monitored closely; IV calcium gluconate should be available. Hyperkalemia presents primarily with cardiac changes; hypomagnesemia can cause tremor but hypocalcemia is the primary postoperative concern.
美國護理師常執行 Chvostek/Trousseau 測試；台灣護理師則較依賴實驗室報告與醫師評估。