一位正在接受 Furosemide 治療的病人自訴肌肉無力與心悸。護理師最擔心哪項檢驗結果？
A patient on Furosemide therapy reports muscle weakness and palpitations. Which laboratory result is the nurse most concerned about?
- ASerum magnesium 1.8 mg/dL血清鎂 1.8 mg/dL
- BSerum sodium 138 mEq/L血清鈉 138 mEq/L
- CSerum chloride 100 mEq/L血清氯 100 mEq/L
- DSerum potassium 2.8 mEq/L✓ 正解血清鉀 2.8 mEq/L
Furosemide 屬於強效環利尿劑（Loop Diuretic），其藥理機轉會抑制腎小管對鈉、氯與鉀的再吸收，導致鉀離子隨尿液大量排泄。低血鉀（Hypokalemia）典型臨床表現包括肌肉無力、疲倦、心律不整（心悸）、便秘等，嚴重者會導致致死性心律不整。護理師應特別關注血鉀檢驗值，優先處理低血鉀風險。
Furosemide is a potent loop diuretic. Its pharmacologic action inhibits the reabsorption of sodium, chloride, and potassium in the renal tubule, leading to large urinary potassium losses. Typical clinical manifestations of hypokalemia include muscle weakness, fatigue, cardiac arrhythmias (palpitations), and constipation, and severe cases can produce lethal arrhythmias. The nurse should pay particular attention to serum potassium levels and address hypokalemia as a priority.