肺血栓栓塞(Ｐｕｌｍｏｎａｒｙｔｈｒｏｍｂｏｅｍｂｏｌｉｓｍ,ＰＥＴ,简称肺栓塞)是一种常见病,在国外发病率很高,据统计,美国每年有600000新发患者,死亡率达15%[1]。我国目前尚无发病率的确切统计,但近年来由于重视了肺栓塞的诊断,且随着诊断技术的不断提高,其发病率有上升 Pulmonary thromboembolism (Pulmonary thromboembolism, Pulmonary embolism) is a common disease, high incidence in foreign countries, according to statistics, the United States every year there are 600,000 new patients, the mortality rate of 15% [1]. In our country, there is no exact statistics on the morbidity at present, but due to the emphasis on the diagnosis of pulmonary embolism in recent years, and with the continuous improvement of diagnostic techniques, the incidence has risen