— 生理適應 · MEDIUM · MCQ —
病人診斷為低血鉀，護理師應優先回報下列哪一項發現？
A client is diagnosed with hypokalemia. Which finding should the nurse prioritize reporting to the provider?
- AGeneralized muscle weakness全身性肌肉無力
- BFrequent premature ventricular contractions✓ 正解頻發性心室早期收縮
- CDecreased bowel sounds腸鳴音減弱
- DReports of abdominal cramping主訴腹部痙攣
— Explanation · 中文詳解 —
低血鉀影響心肌細胞膜電位，最危險的併發症為心律不整（如 PVCs 或心室顫動），可能導致心跳停止。其餘選項（虛弱、腹痛、腸蠕動減弱）屬於低血鉀的臨床表現，雖需處理，但緊急程度遠不及威脅生命的心律失常。護理重點在於先穩定心電活動。
Hypokalemia alters myocardial cell membrane potentials, predisposing the client to lethal arrhythmias such as frequent premature ventricular contractions (PVCs). Although muscle weakness and decreased bowel sounds are common signs, cardiac instability poses the greatest immediate threat to life and must be prioritized.
✦ 台美臨床差異
美方對於 Telemetry 監測的護理師判讀要求較高，台灣常仰賴心電圖儀器警示及醫師判讀。