— 降低風險 · MEDIUM · MCQ —
一位心衰竭病人正在靜脈滴注 furosemide，護理師應最密切監測哪項檢驗值？
A nurse is caring for a client with a history of heart failure who is receiving IV furosemide. Which lab value should the nurse monitor most closely?
- ASerum calcium血清鈣
- BBlood glucose血糖
- CSerum potassium✓ 正解血清鉀
- DSerum sodium血清鈉
— Explanation · 中文詳解 —
Furosemide 屬於環利尿劑（Loop diuretic），其作用機轉為抑制亨利氏環（Loop of Henle）對鈉、鉀、氯的再吸收，導致大量鉀離子隨尿液排出。低血鉀（Hypokalemia）會顯著增加毛地黃（Digoxin）毒性風險，並誘發心室性心律不整。因此，對心衰竭病人而言，監測血鉀濃度是確保用藥安全的最重要指標。
Furosemide is a loop diuretic that acts by inhibiting reabsorption of sodium, potassium, and chloride at the loop of Henle, causing significant loss of potassium in the urine. Hypokalemia significantly increases the risk of digoxin toxicity and can precipitate ventricular dysrhythmias. Therefore, for clients with heart failure, monitoring the serum potassium level is the most important indicator of safe medication use.