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)

Patent

CA 2352314

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.

L'invention concerne un fil de guidage possédant une partie distale comportant de multiples segments centraux se rétrécissant dans un sens distal dont au moins deux segments contigus parmi lesquels le segment présentant le rétrécissement le plus distal présente, de préférence, un degré plus important de conicité que le segment central rétréci en position contiguë proximale. Elle concerne également un dispositif intracorporel allongé, de préférence, un fil de guidage ou une de ses sections, possédant un élément central ou un élément semblable pourvu d'une pluralité de segments rétrécis contigus présentant des angles de conicité conçus pour produire une modification linéaire de rigidité sur une section de la longueur du dispositif. Ce dispositif peut également posséder une section centrale comportant un angle de conicité à variation continue afin de produire un profil curviligne, de préférence, conçu pour créer une modification linéaire de rigidité du noyau central sur une partie de la longueur du dispositif.

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