病人靜脈點滴輸注 20 mEq 氯化鉀於 100 mL 生理食鹽水中，護理師觀察到輸注部位腫脹、觸感冰冷且皮膚蒼白。護理師應優先採取的行動為何？
A client is receiving an intravenous infusion of potassium chloride 20 mEq in 100 mL of 0.9% Normal Saline. The nurse notes the infusion site is swollen, cool to the touch, and pale. Which action should the nurse take first?
- ANotify the healthcare provider通知醫療提供者
- BStop the infusion immediately✓ 正解立即停止輸注
- CElevate the affected extremity抬高患肢
- DApply a warm compress to the site在注射部位應用熱敷
氯化鉀（KCl）屬於高警訊藥物，具有強烈的血管刺激性。臨床上若出現輸注部位腫脹、冰冷、蒼白，即表示發生外滲（Infiltration）。氯化鉀若滲漏至組織，可能導致組織壞死甚至需手術清創。護理師的第一反應必須是「停止輸注」，以阻斷藥物繼續進入組織，保護病人安全，這是護理師在處理藥物外滲時的最高指導原則。
Potassium chloride (KCl) is a high-alert medication that is highly vesicant. Clinically, swelling, coolness, and pallor at the infusion site indicate infiltration. If KCl leaks into surrounding tissue, it may cause tissue necrosis that may even require surgical debridement. The nurse's first reaction must be to stop the infusion to prevent further medication from entering the tissue, in order to protect the patient. This is the foremost principle when managing medication extravasation.