肺栓塞(ｐｕｌｍｏｎａｒｙｅｍｂｏｌｉｓｍ,ＰＥ)是大循环血液中出现的不溶性异常物,随血液流动阻塞肺动脉造成的。它是神经外科患者一个重要致残和死亡的原因。据估计,美国每年ＰＥ的发病人数高达63万,死于ＰＥ的患者在5000～20000之间,可见其死亡率之高[1,2]。只有合理的预 Pulmonary embolism (PE) is an insoluble anomaly found in large circulating blood that clogs the pulmonary artery with blood flow. It is one of the major causes of disability and death in neurosurgical patients. It is estimated that the annual incidence of PE in the United States is as high as 630,000. The number of patients dying from PE is between 5,000 and 20,000, showing a high mortality rate [1,2]. Only reasonable pre-