Guide wire with adjustable flexibility

Details Guide wire with adjustable flexibility Guide wire with adjustable flexibility

A - Human Necessities

61

M

A61M 25/01 (2006.01) A61B 5/00 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2470598

A guide wire with a distal portion having adjustable flexibility. The guide wire may include a distal polymeric member and a heat source. The heat source may be activated to cause the polymeric member to increase in temperature and increase in flexibility. The increase in flexibility of the distal portion of the guide wire enhances the ability of the guide wire to navigate tortuous vasculature to a target site. After the guide wire has been navigated to the target site, the heat source may be deactivated to cause the polymeric member to decrease in temperature and increase in stiffness. The increase in stiffness of the distal portion of the guide wire enhances support provided for devices (e.g., catheters) advanced thereon.

La présente invention concerne un fil-guide avec une partie distale dont la souplesse est réglable. Ce fil-guide peut comprendre un élément distal polymère et une source de chaleur. Cette source de chaleur peut être activée de façon à entraîner une hausse de température de l'élément polymère et une augmentation de sa souplesse. L'augmentation de souplesse de la partie distale de ce fil-guide renforce la possibilité de ce fil-guide de naviguer dans des vaisseaux sinueux vers un site cible. Après cette navigation du fil-guide vers le site cible, on peut désactiver la source de chaleur, entraînant ainsi une baisse de la température de cet élément polymère et renforçant sa rigidité. L'augmentation de la rigidité de la partie distale du fil-guide renforce le support fourni à des dispositifs (par exemple des cathéters) avancés sur ce fil-guide.

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