一位心衰竭病人被處方靜脈注射 Furosemide 40 mg。給藥前護理師最應優先評估下列何項指標？
A client is prescribed intravenous furosemide 40 mg for acute heart failure. Which assessment finding is most important for the nurse to evaluate before administration?
- ASerum creatinine血清肌酸酐
- BRespiratory rate呼吸速率
- CBlood glucose level血糖濃度
- DSerum potassium level✓ 正解血清鉀濃度
Furosemide 屬於排鉀型利尿劑，會顯著促進鉀離子隨尿液排出，極易導致低血鉀（Hypokalemia）。低血鉀會增加心肌對 Digoxin 的敏感性，導致嚴重心律不整。給藥前，護理師必須確認血清鉀離子濃度是否處於正常範圍（3.5-5.0 mEq/L）。若鉀離子過低，應先暫停給藥並通知醫師，以保障病人生命安全。
Furosemide is a potassium-wasting diuretic that significantly promotes urinary potassium excretion and can easily lead to hypokalemia. Hypokalemia increases myocardial sensitivity to digoxin and can result in serious arrhythmias. Before administration, the nurse must confirm that the serum potassium concentration is within the normal range (3.5-5.0 mEq/L). If the potassium level is too low, the medication should be withheld and the physician notified to safeguard the client's life.