病人正接受靜脈注射氯化鉀 20 mEq 於 100 mL 生理食鹽水中，護理師發現輸注部位出現紅腫。護理師應優先採取之行動為何？
A client is receiving an IV infusion of Potassium Chloride 20 mEq in 100 mL of 0.9% Normal Saline. The nurse notes redness and swelling at the site. What is the priority nursing action?
- AApply a cold compress to the site在注射部位應用冷敷
- BSlow the infusion rate減慢輸注速率
- CAssess the client's serum potassium level評估病人的血清鉀離子濃度
- DDiscontinue the IV infusion immediately✓ 正解立即停止靜脈輸注
鉀離子（KCl）是強烈血管刺激劑，若發生滲漏（Extravasation），會造成組織壞死。當發現輸注部位紅腫時，護理師的首要行動是立即停止輸注，以防止更多藥物進入組織造成嚴重損傷。移除管路後，再進行後續評估與處置（如溫敷或藥物塗抹）。此動作屬於預防嚴重組織併發症的關鍵急救步驟，延誤將導致不可逆傷害。
Potassium chloride (KCl) is a strong vascular irritant; extravasation can cause tissue necrosis. When redness and swelling are noted at the infusion site, the nurse's first action is to stop the infusion immediately to prevent further drug entry into tissue and serious injury. After removing the line, subsequent assessment and management (such as warm compresses or pharmacologic measures) should be performed. This step is a critical emergency action to prevent severe tissue complications; any delay can result in irreversible damage.