護理師正為病人進行萬古黴素（Vancomycin）點滴注射，病人出現臉部潮紅、心搏過速及低血壓。護理師應採取之首要措施為何？
A nurse is administering a piggyback infusion of vancomycin to a client. The client develops flushing, tachycardia, and hypotension. What is the priority nursing action?
- AStop the infusion✓ 正解停止輸注
- BAdminister an antihistamine給予抗組織胺
- CSlow the infusion rate減慢輸注速率
- DNotify the healthcare provider通知醫療提供者
病人出現臉部潮紅、心搏過速及低血壓，這是典型的「紅人症候群」（Red Man Syndrome），起因於萬古黴素（Vancomycin）輸注速度過快，導致肥大細胞釋放組織胺（Histamine）。當病人出現低血壓等生命徵象不穩定跡象時，護理師應視為過敏反應或休克前兆，首要行動必須是立即停止輸注（Stop the infusion），以阻斷持續的致敏原進入，之後再評估是否需要執行其他治療。
The client is exhibiting signs of Red Man Syndrome, a histamine-mediated reaction caused by rapid vancomycin infusion, characterized by flushing, tachycardia, and hypotension. The priority nursing action is to stop the infusion immediately to prevent further release of histamine and potential progression to shock. After stopping the infusion, the nurse can then administer prescribed antihistamines and notify the provider.