肺血栓栓塞症 (pulmonarythromboembolism ,PTE)简称肺栓塞 ,指来自静脉系统或右心的血栓阻塞肺动脉或其分支 ,引起以肺循环和呼吸功能障碍为主要临床和病理生理特征的疾病。栓塞后发生肺出血或坏死者称肺梗死。肺栓塞发病率呈逐年上升趋势 ,但其误诊、漏诊率高而检出率低[1,2 Pulmonary thromboembolism (PTE) referred to as pulmonary embolism, refers to the venous system or right heart thrombus blocking the pulmonary artery or its branches, causing pulmonary circulation and respiratory dysfunction as the main clinical and pathophysiological characteristics of the disease. Pulmonary hemorrhage or necrosis after embolism, said lung infarction. The incidence of pulmonary embolism has been increasing year by year, but its misdiagnosis, missed diagnosis rate is high and the detection rate is low [1,2