一位被診斷為厭食症的個案，下列哪項評估發現需要護理師立即介入？
A client is diagnosed with anorexia nervosa. Which assessment finding requires immediate nursing intervention?
- AWeight loss of 25% below ideal body weight體重低於理想體重 25%
- BLanugo growth on the arms and face手臂和臉部長出細毛
- CObsessive focus on food preparation強迫性地專注於食物準備
- DPotassium level of 2.8 mEq/L✓ 正解鉀離子濃度 2.8 mEq/L
厭食症患者常因嘔吐或使用瀉藥導致嚴重的電解質不平衡。血鉀 2.8 mEq/L 屬於嚴重低血鉀，隨時可能引發心律不整甚至致命。B 與 A 是厭食症常見的生理特徵與長期惡化指標，但 D 屬於立即威脅生命的生理危象，優先順序最高。
While significant weight loss and lanugo are characteristic of anorexia nervosa, they represent chronic conditions rather than immediate physiological threats. A potassium level of 2.8 mEq/L indicates severe hypokalemia, which poses an imminent risk of life-threatening cardiac arrhythmias and arrest due to electrolyte imbalances from purging behaviors. This finding requires the highest priority for immediate nursing intervention to stabilize the client's cardiac status.
在台灣，厭食症照護多在精神科病房或消化內科；美國則有專門的飲食障礙醫療小組（Eating Disorder Team）共同參與。