護理師為低血鉀病人靜脈注射氯化鉀，發現輸液部位腫脹且冰冷，首要行動為何？
A nurse is administering a dose of IV potassium chloride to a client with hypokalemia. The nurse notes the IV site is swollen and cool to the touch. What is the priority action?
- AApply a warm compress to the site在穿刺點應用熱敷
- BElevate the affected extremity抬高患肢
- CAssess distal pulses評估遠端脈搏
- DStop the infusion immediately✓ 正解立即停止輸液
氯化鉀（KCl）是高警訊藥物，對血管內皮具有強烈的刺激性。若發生靜脈滲漏（Infiltration），藥物進入皮下組織會導致嚴重的組織損傷甚至壞死。護理師發現滲漏徵象（腫脹、冰冷）時，首要行動是立即停止輸液（Stop the infusion），以防更多藥物進入受損組織，此為安全照護中最關鍵的優先行動。
Potassium chloride (KCl) is a high-alert medication that is highly irritating to the vascular endothelium. If extravasation occurs, the drug enters subcutaneous tissue and can cause severe tissue damage or necrosis. When the nurse notices signs of infiltration (swelling, coolness), the priority action is to stop the infusion immediately to prevent additional drug from entering the injured tissue; this is the most critical safety action.