Patent ID: 7763044

Claim:
An alienated thrombus capture device comprising: a ring portion having an approximately ring shape and comprising a wire member having foldable elasticity, a flexibly transformable linear stiffener portion that penetrates the ring portion, a porous bursiform portion comprising an open edge portion mounted on the ring portion and a closed edge portion mounted on a part of a distal end side of the stiffener portion, and a plurality of flexibly transformable support linear member portions attached to a support portion on the stiffener portion at a proximal end side of said stiffener portion relative, to the closed edge portion of the bursiform portion, and a support portion on the ring portion in a strained state, wherein when an outside force is exerted on said flexibly transformable support linear member portions, said flexibly transformable support linear member portions are drawn toward said stiffener portion, and then when said ring portion is subjected to tensions of said support linear member portions exerted by said outside force, said ring portion folds from an expanded state into a transport state wherein a plurality of peaks facing the distal end side of the stiffener portion and a plurality of valleys facing the proximal end side of the stiffener portion are alternately formed in accordance with a wavy shape, wherein the plurality of flexibly transformable support linear member portions and support portions on said ring portion are disposed radially at equal points, each of which generally equally divides the circumference of the ring portion, wherein said alienated thrombus capture device further comprises dividing points that generally equally divide the circumference of the ring portion into an even number of four or greater parts, wherein the support portions on the ring portion are formed at middle points between adjacent dividing points, and wherein at least every other dividing point divides the ring portion such that the ring portion can be folded, so that every other dividing point forms a peak facing a distal end side of the stiffener portion and the other dividing points form valleys facing the proximal end side of the stiffener portion.