Objective To evaluate the efficacy of inferior vena cava filter placement guided by digital subtraction angiography(DSA) for the prevention of pulmonary embolism(PE) after deep vein thrombosis(DVT) of the lower extremities.

• 目的探讨数字减影血管造影(d igital subtraction angiography,DSA)引导下置入腔静脉滤网对深静脉血栓形成后肺栓塞(pu lmonary embolism,PE)的预防作用。