引起肺栓塞(PE)的血栓主要来源于深静脉血栓(DVT)。DVT与PE为同一疾病过程在不同部位、不同阶段的两种表现形式,二者共属于静脉血栓栓塞症(VTE)[1]。国外发现其先天性易患因素主要包括遗传性抗凝血酶-Ⅲ(AT-Ⅲ)缺乏症、遗传性蛋白C缺乏症、遗传性蛋白S缺乏症以及活化的蛋白C抵 Pulmonary embolism (PE) is mainly caused by deep venous thrombosis (DVT). DVT and PE are two manifestations of the same disease process in different parts and stages, both of which belong to venous thromboembolism (VTE) [1]. Abroad found that its predisposing factors include hereditary anti-thrombin-Ⅲ (AT-Ⅲ) deficiency, hereditary protein C deficiency, hereditary protein S deficiency and activated protein C arrived