The invention relates to the technical field of
medical instruments, and in particular relates to a postcava filter being capable of being placed for a long term and provided with an anti-proliferation and antithrombus
medicine coating. The postcava filter comprises a
branch pipe, a
pipe sleeve and a plurality of
metal filtering wires, wherein two ends of the
metal filtering wires are respectivelyconnected in the
branch pipe and the pipe sleeve, and the
metal filtering wires are convex outwards, so that a filtering cage is formed; the
branch pipe and the pipe sleeve are made of a soft material; a first
medicine coating used for resisting
thrombus coats each metal filtering wire. According to the postcava filter, the
thrombus can be intercepted through the metal filtering wires, so that
embolism seldom occurs, due to the first
medicine coatings on the metal filtering wires, the taking-out time of the filter can be prolonged, meanwhile, the occurrence rate of a series of complications including the difficulty in taking out, the injuries or tearing of the blood vessels, and the like which are caused by too late taking out can be reduced, the branch pipe and the pipe sleeve sleeve twoends of the metal filtering wires, so that the blood vessels are seldom injured. The postcava filter is strong in practicability and convenient to operate.