護理師正在監測一位因深部靜脈栓塞（DVT）接受持續肝素（Heparin）靜脈輸注的病人。護理師應監測哪項檢驗值以評估該治療的效果？
A nurse is monitoring a client receiving a continuous heparin infusion for deep vein thrombosis (DVT). Which laboratory value should the nurse monitor to evaluate the effectiveness of this therapy?
- AProthrombin Time (PT)凝血酶原時間 (PT)
- BBleeding Time出血時間
- CInternational Normalized Ratio (INR)國際標準化比值 (INR)
- DActivated Partial Thromboplastin Time (aPTT)✓ 正解活化部分凝血活酶時間 (aPTT)
靜脈輸注普通肝素（Unfractionated Heparin）的療效監測主要依靠 aPTT。aPTT 反應的是內源性凝血路徑，其治療目標通常是病人基礎值的 1.5 到 2.5 倍。如果 aPTT 過低，血栓可能進一步發展；如果過高，則出血風險大增。PT 和 INR（A、C）是用來監測華法林（Warfarin）的。出血時間（B）在臨床上已較少用於抗凝血藥物的常規監測。這是護理師在執行高風險藥物管理時必須具備的藥物動力學基礎知識，確保給藥劑量在安全且有效的治療窗內。
Therapeutic monitoring of an intravenous unfractionated heparin infusion relies primarily on the aPTT. The aPTT reflects the intrinsic coagulation pathway, and the therapeutic target is generally 1.5 to 2.5 times the patient's baseline value. If the aPTT is too low, the thrombus may continue to extend; if it is too high, bleeding risk rises sharply. PT and INR (options A and C) are used to monitor warfarin. Bleeding time (option B) is rarely used clinically for routine anticoagulant monitoring. This pharmacokinetic foundation is essential for nurses managing high-risk medications, ensuring that the dose remains within a safe and effective therapeutic window.
在美國，護理師常依據檢驗報告與內建的肝素調整量表（Heparin Protocol）自主調整滴注速度；台灣臨床則多由護理師通報數值後，由醫師決定並開立調整後的滴注醫囑。