病人因急性肺水腫被處方呋塞米（furosemide）40 mg 靜脈注射。給藥前護理師最應優先評估下列何者？
A client is prescribed furosemide 40 mg IV push for acute pulmonary edema. Which assessment finding is most important for the nurse to evaluate prior to administration?
- ABlood glucose level of 110 mg/dL血糖值為 110 mg/dL
- BPotassium level of 3.2 mEq/L✓ 正解鉀離子值為 3.2 mEq/L
- CRespiratory rate of 22 breaths/min呼吸頻率為 22 次/分鐘
- DBlood pressure of 130/85 mmHg血壓為 130/85 mmHg
呋塞米（Furosemide）是強效的袢利尿劑（Loop diuretic），會促進鈉、氯與鉀離子隨尿液排出。低血鉀（Hypokalemia）是其最常見且危險的副作用，因為低血鉀會顯著增加致命性心律不整的風險。護理師在給藥前，必須確認病人的血清鉀離子濃度是否在正常範圍（3.5-5.0 mEq/L）。若數值過低，給藥可能引發心律不整，護理師應先暫停給藥並通知醫師，這是用藥安全的核心要求。
Furosemide is a potent loop diuretic that promotes urinary excretion of sodium, chloride, and potassium ions. Hypokalemia is its most common and dangerous side effect, as low potassium significantly increases the risk of lethal dysrhythmias. Before administration, the nurse must verify that the client's serum potassium falls within the normal range (3.5–5.0 mEq/L). If the value is too low, giving the medication may precipitate dysrhythmias, and the nurse should hold the dose and notify the provider; this is a core principle of medication safety.