System, apparatus and method for opening an occluded lesion

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/09 (2006.01) A61B 17/3207 (2006.01) A61M 25/06 (2006.01)

Patent

CA 2687567

A system, apparatus and method for maximizing efficiency of tissue removal from body passageways is provided.The system comprises a device for opening an occluded lesion, e g, a rotational atherectomy device or angioplasty device, and a guide wire having an introducer sheath. The guide wire introducer sheath may comprise a hypo tube having columnar strength greater than that of the guide wire alone to assist the guide wire in crossing occluded lesions, wherein the sheath and guide wire are axially moveable relative to each other. The guide wire sheath may further comprise increased flexibility at its distal end to increase flexibility and/or a soft distal tip to help with steerabihty through the vasculature. The sheath may allow for a smaller outer diameter guide wire which in turn may allow for a smaller outer diameter on the occlusion-opening device.

L'invention concerne un système, un appareil et un procédé de maximisation de l'efficacité de retrait de tissus des voies de passages corporelles. Le système comprend un dispositif d'ouverture d'une lésion fermée, par exemple un dispositif d'athérectomie ou d'angioplastie, et un fil de guidage doté d'une gaine d'introduction. La gaine d'introduction du fil de guidage peut comprendre un hypo-tube ayant une résistance colonnaire plus grande que celle du fil de guidage seul pour aider le fil de guidage à traverser les lésions fermées, la gaine et le fil de guidage pouvant être déplacés axialement l'un par rapport à l'autre. La gaine du fil de guidage peut présenter en outre une flexibilité accrue à son extrémité distale pour améliorer la flexibilité et/ou peut comprendre une pointe distale souple pour aider à la capacité de pointage au travers des vaisseaux. La gaine peut autoriser un fil de guidage à diamètre externe plus petit qui peut lui-même recevoir un diamètre externe plus petit sur le dispositif d'ouverture d'occlusion.

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