Dedicated distal protection guidewires

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/09 (2006.01) A61F 2/01 (2006.01)

Patent

CA 2487323

A dedicated distal protection guidewire having proximal and distal stops disposed about an elongated core wire is disclosed. A guidewire in accordance with the present invention includes an elongated core wire having a relatively stiff proximal section and a relatively flexible distal section, a distal stop disposed about a portion of the elongated core wire, and a proximal stop disposed about a portion of the elongated core wire proximal the distal stop. The distal stop may be formed from an enlarged outer diameter portion on the elongated core wire, or may be formed from an object disposed about and secured to a portion of the elongated core wire. The proximal stop may include an O-ring disposed within a recessed surface on the elongated core wire, or an annular ring having several circumferentially disposed notches. In one exemplary embodiment, a distal protection guidewire may include a proximal stop comprising a first tubular member, a second tubular member, and a plurality of expandable struts actuatable between a collapsed position and a deployed position.

l'invention concerne un fil-guide de protection distal doté de butées proximale et distale disposées sur une tige d'armature allongée. Selon l'invention, ce fil-guide comprend une tige d'armature allongée qui présente une section proximale relativement rigide et une section distale relativement souple, une butée distale disposée autour d'une partie de la tige d'armature rigide, et enfin, une butée proximale disposée autour de la tige d'armature allongée. La butée distale peut être constituée d'une partie à grand diamètre extérieur sur le fil-guide allongée, ou d'un objet disposé et fixé autour d'une partie de la tige d'armature allongée. La butée proximale peut comprendre un joint torique disposé dans une surface évidée sur la tige d'armature allongée, ou un anneau de bobinage comportant sur son pourtour de nombreuses entailles. Dans un mode de réalisation cité en exemple, un fil-guide de protection distal peut comprendre une butée proximale pourvue d'un premier élément tubulaire, d'un second élément tubulaire, et d'une pluralité d'entretoises extensibles actionnables entre une position repliée et une position déployée.

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