Guidewire having linear change in stiffness

Details Guidewire having linear change in stiffness Guidewire having linear change in stiffness

A - Human Necessities

61

M

A61M 25/09 (2006.01) A61B 1/005 (2006.01) A61B 17/3207 (2006.01) A61F 2/84 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2617284

The invention is directed to a guidewire having a distal section with multiple distally tapered core segments with at least two contiguous distally tapering core segments in which the most distal tapered core segment preferably has a greater degree of taper than the proximally contiguous tapered core segment. The invention is also directed to an elongated intracorporeal device, preferably a guidewire or section thereof, that has a core member or the like with a plurality of contiguous tapered segments having taper angles that are configured to produce a linear change in stiffness over a longitudinal section of the device. The device may also have a core section with a continuously changing taper angle to produce a curvilinear profile that preferably is configured to produce a linear change in stiffness of the core over a longitudinal section of the device.

Fil guide ayant une partie distale comportant plusieurs segments centraux se rétrécissant dans le sens distal dont au moins deux segments contigus parmi lesquels le segment présentant le rétrécissement le plus distal présente, de préférence, un degré plus grand de conicité que le segment central rétréci en position contiguë proximale. L'invention comporte aussi un dispositif intracorporel allongé, idéalement, un fil guide ou une de ses parties, comportant un élément central ou un autre élément semblable pourvu de plusieurs segments rétrécis contigus présentant des angles de conicité prévus pour produire une modification linéaire de rigidité sur une section longitudinale du dispositif. Le dispositif peut également comporter une section centrale dont l'angle de conicité varie de façon continue afin de produire un profil curviligne, de préférence, conçu pour créer une modification linéaire de rigidité du noyau central sur une partie longitudinale du dispositif.

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