— 生理適應 · MEDIUM · MCQ —
一位病人因低血鉀入院，護理師應優先執行哪項評估？
A client is admitted with hypokalemia. Which assessment should the nurse perform first?
- AObtain an electrocardiogram✓ 正解取得心電圖
- BAssess deep tendon reflexes評估深部肌腱反射
- CCheck skin turgor檢查皮膚彈性
- DAuscultate bowel sounds聽診腸鳴音
— Explanation · 中文詳解 —
低血鉀（Hypokalemia）對心肌細胞的電生理活動影響極大，容易引發致命性的心律不整（如 ST 段下降、T 波平坦、出現 U 波）。在 NCLEX 的優先級原則中，循環（Circulation）問題永遠優先於其他系統評估。心電圖（ECG）能即時評估鉀離子異常對心臟傳導的威脅，是臨床上最迫切的診斷工具。
Hypokalemia significantly affects cardiac electrophysiology and predisposes the client to life-threatening arrhythmias (such as ST-segment depression, flat T waves, and the appearance of U waves). According to NCLEX priority principles, circulation always takes precedence over other systems. An ECG provides real-time assessment of the threat that potassium imbalance poses to cardiac conduction and is the most urgent diagnostic tool in this setting.