一位病人因嚴重的 MRSA 感染處方靜脈注射萬古黴素 (Vancomycin)。護理師應優先採取哪項行動以確保用藥安全？
A client is prescribed intravenous vancomycin for a severe MRSA infection. Which action should the nurse prioritize to ensure safe medication administration?
- AInfuse the medication over at least 60 minutes.以至少 60 分鐘之時間輸注藥物
- BAssess the peak serum level 30 minutes after completing the infusion.在輸注完成後 30 分鐘評估血清峰值濃度
- CMonitor for the development of a red, itchy rash on the face and neck.監測面部與頸部是否出現紅癢皮疹
- DDraw a serum trough level just before the fourth dose.✓ 正解於第四劑給藥前抽取血清谷值濃度
萬古黴素（Vancomycin）具有顯著的腎毒性與耳毒性，其治療窗非常窄。在現代臨床指引中，為了確保療效並減少腎損傷，監測「最低血中濃度」（Trough level）是最關鍵的安全優先措施。選項 D 指出在第四劑給藥前（即達到穩定狀態時）抽取最低濃度，這是目前公認的最佳實踐，能精確反映藥物在體內的蓄積狀況。雖然選項 A（滴注至少 60 分鐘）與選項 C（監測紅人症候群）也非常重要，但它們是為了預防「輸注反應」，而非「長期器官毒性」。紅人症候群是因滴注過快而非過敏。選項 B（Peak level）目前在萬古黴素的臨床常規管理中已不再被強調，因為 Peak 與毒性的相關性不如 Trough 高。因此，從藥理安全與藥物動力學監測（TDM）的角度看，最低濃度的監測對於防止不可逆的腎功能衰竭具備最高的優先級。
Vancomycin is markedly nephrotoxic and ototoxic and has a very narrow therapeutic window. In contemporary clinical guidelines, monitoring the trough level is the single most critical safety priority to ensure efficacy while minimizing renal injury. Option D correctly identifies drawing a trough just before the fourth dose (when steady state is reached) as best practice, since it accurately reflects drug accumulation in the body. Although option A (infusing over at least 60 minutes) and option C (monitoring for red man syndrome) are also important, these address infusion-related reactions rather than long-term organ toxicity; red man syndrome is rate-related, not a true allergic reaction. Option B (peak level) is no longer emphasized in routine vancomycin management, because peak levels correlate poorly with toxicity compared with troughs. Therefore, from the standpoint of pharmacologic safety and therapeutic drug monitoring (TDM), trough level monitoring takes the highest priority in preventing irreversible renal failure.
在美國，護理師需具備藥物動力學知識，主動在給藥前確認醫師是否已開立 Trough 醫囑，並與檢驗科協調採血時間。台灣臨床上，TDM（治療藥物監測）多由臨床藥師介入指導，護理師主要負責執行採血與觀察滴注部位。NCLEX 特別強調護理師在『正確時間』採血的責任感，這是考題中的陷阱，不可與一般抽血混淆。