IMPLANT FOR OCCLUDING BLOOD CIRCULATION Russian patent published in 2008 - IPC A61B17/00 

FIELD: medical engineering.

SUBSTANCE: implant is compressible to enable one to introduce it by means of delivery mechanism. The implant allows its rolling out and expanding for closing passage in blood circulation system. The implant has thin elongated members arranged essentially in parallel to each other when the implant is in compressed state, the members being bent outside in unclosed or expanded implant state. The elongated members are rolled in transverse direction assuming annular shape as response to overpassing critical point transition in longitudinal compression. The implant also has compressible closure body, being preferentially folding into compressed state allowing its spreading with transition into rolled-out or expanded state. The closure body is attached to the elongated members which enable the closure body to assume rounded shape in expanded state. The elongated members are preferentially manufactured at least partially from biodegradable material. The implant has a number of thin preferentially rigid members, each having distal and proximal end, holder having distal ends of said members attached to it, the second holder having proximal ends of said members attached to it. Expandable, preferentially foldable closure body is attached to the members. The set of members form elongated article together with the closure body. The article is elongated along longitudinal axis to enable its introducing by means of the delivery mechanism in introduction state. Said members attached to the first and the second holder are twistable in transverse direction in response to shortening distance between the holders, when the distance passes over the critical point. The twisting motion relative to the longitudinal axis causes plurality of essentially radially elongated loops to be formed, creating at least single fixed structure expanding in this way and preferentially spreading the closure body. The at least single fixed structure is lockable in closed state. At least the mentioned set of members is manufactured from biodegradable material.

EFFECT: high reliability of implant grafting in organism.

19 cl, 10 dwg