Warfarin is the most commonly used oral anticoagulant utilized in the United States (1), and is often encountered by anesthesiologists in patients with medical conditions requiring chronic anticoagulation or perioperative thromboembolism prophylaxis.

• 华法林是美国最常用的口服抗凝药物，麻醉医生也经常遇到需要长期抗凝治疗或围术期预防血栓的患者。