近年来随着对肺栓塞 (PE)临床和病理生理机制认识的深入 ,其诊断率逐年提高。肺栓塞的常见原因为下肢深静脉血栓 (DVT) ,有 95 %的栓子来自下肢深静脉 ,如能阻止下肢静脉血栓进入肺动脉将明显降低肺栓塞的发病率[1] 。下腔静脉滤器可以捕获来自下肢深静脉的大块血栓 ,使严重肺 In recent years, with the understanding of the clinical and pathophysiological mechanisms of pulmonary embolism (PE), the diagnosis rate has been increasing year by year. A common cause of pulmonary embolism is deep venous thrombosis (DVT) of the lower extremities, with 95% of the emboli coming from the deep veins of the lower extremities. If it prevents the venous thrombosis of the lower extremities from entering the pulmonary artery, the incidence of pulmonary embolism will be significantly reduced [1]. Inferior vena cava filters can capture large thrombi from the deep veins of the lower extremities, causing severe lung injury