肺栓塞(pu lmonary embolism,PE)是临床常见的病症,美国每年有60万PE病人,其中1/3最终死亡[1]。在我国PE患病率有逐年增多的趋势。而在高原环境因为继发性红细胞增多使血液黏滞度增加,导致PE发病率增加。由于PE临床表现缺乏特异性,加之客观诊断技术和设施受限,易造成误诊、漏诊 Pulmonary embolism (PE) is a common clinical condition. In the United States, there are 600,000 PE patients each year, of which 1/3 eventually dies [1]. PE in our country has a trend of increasing year by year. In the plateau environment because of secondary erythrocyte increase blood viscosity, leading to increased incidence of PE. Due to the lack of specificity of clinical manifestations of PE, combined with objective diagnostic techniques and facilities are limited, easily lead to misdiagnosis, missed diagnosis