Objective:To evaluate the effectiveness of the vena cava filter in the prevention of pulmonary embolism in the treatment of deep venous thrombosis(DVT) of the acute lower limb.

• 目的:探讨经皮穿刺下腔静脉滤器植入术在治疗下肢深静脉血栓中预防肺动脉栓塞的作用。