— 生理適應 · MEDIUM · MCQ —
病人因低血鉀（2.8 mEq/L）入院。下列哪項評估發現應優先注意？
A client is admitted with hypokalemia (2.8 mEq/L). Which assessment finding should the nurse prioritize?
- AIrregular heart rhythm✓ 正解心律不整
- BMuscle weakness in lower extremities下肢肌肉無力
- CDry mucous membranes黏膜乾燥
- DDiminished bowel sounds腸鳴音減弱
— Explanation · 中文詳解 —
鉀離子（Potassium）維持細胞膜電位，對心肌電氣傳導至關重要。低血鉀（Hypokalemia）會導致心肌興奮性異常，進而引發心律不整（如心室顫動、U 波出現）。心律不整可能導致心跳停止，是直接威脅生命安全的緊急情況。因此，護理師在處理低血鉀病人時，必須優先進行心電圖監測，評估心律並觀察電解質失衡對心臟的影響。
Hypokalemia significantly affects cardiac conduction, making irregular heart rhythms the most critical assessment finding due to the risk of life-threatening dysrhythmias. While muscle weakness and diminished bowel sounds are common symptoms, cardiac stability takes precedence in nursing priorities.