华法林主要是通过干扰维生素K的代谢,防止血栓形成。出血是其最容易出现的不良反应,发生率为9%～10%,一般发生于消化道、泌尿生殖系,甚至大脑等,特别是65岁以上的老年患者,是出血倾向的高危人群[1]。1对象与方法1.1对象我院门诊、住院患者服用华法林2周以上的共32例。1.2方法用 Warfarin mainly prevents thrombosis by interfering with the metabolism of vitamin K. Bleeding is its most prone to adverse reactions, the incidence of 9% to 10%, usually occurs in the digestive tract, genitourinary system and even the brain, especially in patients over the age of 65, is a high risk of bleeding tendency [1 ]. 1 objects and methods 1.1 object in our hospital, hospitalized patients taking warfarin for more than two weeks in a total of 32 cases. 1.2 method used