護理師照護一位急性腎損傷病人，下列哪項檢驗數值需立即回報醫師？
A nurse is caring for a client with acute kidney injury. Which laboratory value should the nurse report to the provider immediately?
- ASerum creatinine 2.5 mg/dL血清肌酸酐 2.5 mg/dL
- BBlood Urea Nitrogen (BUN) 40 mg/dL尿素氮 (BUN) 40 mg/dL
- CHemoglobin 10.5 g/dL血紅素 10.5 g/dL
- DSerum potassium 6.8 mEq/L✓ 正解血清鉀 6.8 mEq/L
急性腎損傷（AKI）導致腎臟無法排出鉀離子，造成高血鉀（Hyperkalemia）。鉀離子濃度 6.8 mEq/L 已達危險水平，極易引發致命性的心律不整（如心室顫動、心搏停止）。護理師在面對此類檢驗值時，必須將「安全」置於首位，立即回報醫師並準備急救措施（如靜脈注射鈣劑、胰島素加葡萄糖等）。其他檢驗項目雖異常，但相較於高血鉀的直接致命風險，其急迫性較低。
Acute kidney injury impairs potassium excretion, leading to severe hyperkalemia, which poses an immediate risk of life-threatening cardiac arrhythmias. A serum potassium level of 6.8 mEq/L is critically high and requires urgent intervention, such as administering calcium gluconate or insulin with glucose, to stabilize the myocardium. While elevated creatinine, BUN, and mild anemia are expected findings in renal failure, they do not present the same acute, lethal threat as hyperkalemia.