護理師準備為低血鉀病人輸注氯化鉀。給藥前最優先需確認的評估指標為何？
A nurse is preparing to administer intravenous potassium chloride to a client with hypokalemia. Which assessment finding is the priority to verify before initiation?
- ASerum creatinine level血清肌酸酐濃度
- BUrine output✓ 正解尿量
- CBlood pressure血壓
- DRespiratory rate呼吸頻率
靜脈輸注氯化鉀（KCl）必須嚴格控管腎功能，因為鉀離子主要透過腎臟代謝。若腎功能受損導致排泄不良，靜脈輸注鉀極易造成致命性的高血鉀與心律不整。在臨床上，以尿量（urine output）作為腎灌流的臨床指標，標準通常要求每小時尿量需大於 30 mL，以確保有足夠的排泄功能。若病人無尿或少尿，絕對禁止靜脈補鉀。
Intravenous potassium chloride (KCl) administration requires strict assessment of renal function, because potassium is excreted primarily by the kidneys. If renal function is impaired and excretion is reduced, IV potassium administration easily produces lethal hyperkalemia and dysrhythmias. Clinically, urine output is used as the bedside indicator of renal perfusion; the standard is generally at least 30 mL/hour to confirm adequate excretory function. If the patient is anuric or oliguric, IV potassium is absolutely contraindicated.