Patent ID: 6846317

Claim:
A kit for the withdrawal of a blood vessel filter, the filter having a bush ( 31 ) and a plurality of flexible strands ( 32 ) fixed to the bush ( 31 ) at a first end thereof, a second free end of the strands having hooks ( 33 ) directed outward so as to engage the inner wall of a blood vessel, the kit comprising: a first external catheter ( 1 ) having a through hole along the longitudinal axis thereof; a second catheter ( 11 ) having a through hole along the longitudinal axis thereof and a diameter allowing slidable engagement of the second catheter in and for the entire length of the through hole of the first external catheter ( 1 ), and a stem having a plurality of flexible legs ( 18 ) fixed at one end of the stem, the flexible legs ( 18 ) extending naturally outward from the one end of the stem, a free end of the flexible legs ( 18 ) having hooks ( 20 ) which extend inwards toward an extension of the longitudinal axis of the stem and can grasp the bush of the filter when compressed around the bush, wherein said stem can be slidably engaged in said second catheter ( 11 ) to compress the flexible legs ( 18 ) within the second catheter ( 11 ) or to release the flexible legs so as to be positioned over the bush, and wherein an assembly of the stem, second catheter, and first external catheter can be inserted within the blood vessel for removal of the filter after the flexible legs have been positioned the bush and then compressed by the second catheter to engage over the bush and the flexible strands of the filter have been compressed by the first external catheter.