Methods and apparatus for flow restoration

Details Methods and apparatus for flow restoration Methods and apparatus for flow restoration

A - Human Necessities

61

B

A61B 17/22 (2006.01)

Patent

CA 2716260

Methods for restoring blood flow in occluded blood vessels using an apparatus having a self expandable distal seg-ment that is pre-formed to assume a superimposed structure in an unconstrained condition but can be made to take on a volume--reduced form making it possible to introduce it with a microcatheter and a push wire arranged at the proximal end, with the distal segment in its superimposed structure assuming the form of a longitudinally open tube and having a mesh structure of intercon-nected strings or filaments or struts. In a preferred embodiment, the distal segment has a tapering structure at its proximal end where the strings or filaments or struts converge at a connection point.

L'invention concerne des procédés pour restaurer un écoulement sanguin dans des vaisseaux sanguins bouchés en utilisant un appareil ayant un segment distal auto-expansible qui est préformé pour adopter une structure superposée dans un état non contraint mais qui peut être amené à prendre une forme de volume réduit, ce qui rend possible son introduction avec un microcathéter et un fil de poussée agencé à l'extrémité proximale, le segment distal dans sa structure superposée adoptant la forme d'un tube ouvert longitudinalement et ayant une structure de maille constituée de fils ou de filaments ou d'entretoises mutuellement reliés. Dans un mode préféré de réalisation, le segment distal a une structure conique à son extrémité proximale où les fils ou filaments ou entretoises convergent au niveau d'un point de liaison.

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