— 生理適應 · MEDIUM · MCQ —
護理師照護一位血鉀值為 6.2 mEq/L 的病人,應優先監測心電圖上的哪種變化?
A nurse is caring for a client with a potassium level of 6.2 mEq/L. Which rhythm change should the nurse prioritize monitoring for on the ECG?
- AProlonged QT intervalQT 間期延長
- BTall, peaked T waves✓ 正解高大尖銳的 T 波
- CProminent U waves明顯的 U 波
- DST segment depressionST 段低下
— Explanation · 中文詳解 —
高血鉀症(Hyperkalemia)會顯著影響心肌傳導。高鉀血症的典型心電圖改變順序為 T 波高尖(Tall, peaked T waves)、PR 間期延長、QRS 波變寬,若未及時處理可能導致心室顫動及心跳停止。
Hyperkalemia markedly affects myocardial conduction. The typical sequence of ECG changes in hyperkalemia is tall, peaked T waves, followed by PR interval prolongation and widening of the QRS complex; if not managed promptly, it may progress to ventricular fibrillation and cardiac arrest.
✦ 台美臨床差異
美國醫院針對高血鉀常有緊急處理流程(如靜脈注射鈣劑),台灣護理師亦需熟悉此流程,但給藥執行常需更嚴格的醫囑確認。