肺栓塞(Pulmonary embolism,PE)是由于内源性或外源性的栓子堵塞肺动脉主干或分支引起肺循环障碍的临床和病理生理综合征。肺栓塞的栓子包括血栓、脂肪、羊水、空气等。该病的发病率高,仅次于冠心病及高血压病,且死亡率也高,仅次于肿瘤及心肌梗死,位居第3位。因PE缺乏特异性症 Pulmonary embolism (PE) is a clinical and pathophysiological syndrome caused by endogenous or extrinsic emboli blocking the pulmonary trunk or branches of the pulmonary circulation. Pulmonary embolism emboli include thrombus, fat, amniotic fluid, air and so on. The incidence of the disease is high, second only to coronary heart disease and hypertension, and the mortality rate is high, second only to tumors and myocardial infarction, ranked No. 3. Because of the lack of specificity of PE disease