A stent and a method of use

Details A stent and a method of use A stent and a method of use

A - Human Necessities

61

M

A61M 29/00 (2006.01) A61F 2/06 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2191307

This invention is a stent comprising a skeletal frame (2) of thermal shape memory material which has been annealed at a temperature sufficient to set a memory shape. The frame (2) is adapted to assume a first condition in which the frame is relatively rigid and substantially tubular in configuration, and a second condition in which the frame is flexible, of reduced stress, and collapsible, such that in the second condition walls (6) of cells (18) of the frame are adapted to be positioned against each other to form a stent diameter substantially equal to the combined thickness of the frame walls in abutting engagement with each other. The cell walls (6) are joined by fusion welds formed before the frame (2) is annealed.

L'invention est un extenseur comprenant une structure d'ossature (2) en matériau à mémoire de forme thermique ayant été recuit à une température suffisante pour fixer une forme de mémoire. La structure (2) est adaptée pour adopter une première configuration dans laquelle elle est relativement rigide et sensiblement tubulaire, et une seconde configuration dans laquelle la structure est flexible, de contrainte réduite, et pliable, de manière que dans la seconde configuration des parois (6) des cellules (18) de la structure sont adaptées pour être positionnées les unes contre les autres afin de former un diamètre d'extenseur sensiblement égal à l'épaisseur combinée des parois de la structure en aboutement les unes avec les autres. Les parois (6) des cellules sont jointes par des soudages par fusion formés avant le recuit de la structure (2).

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