Braided stent

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01) B21F 45/00 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2226975

A braided stent (1) for transluminal implantation in body lumens is self- expanding and has a radial expanded configuration in which the angle .alpha. between filaments is acute. Some or all of filaments (6, 7) are welded together in pairs at each end (4, 5) of the stent to provide beads (8), thereby strengthening the stent and assisting its deployment from a delivery device. The stent is preferably completely coated using a biocompatible polymeric coating, said polymer preferably having pendant phosphoryl choline groups. A method of making the stent by braiding and welding is described as well as a delivery device for deploying the device.

Cette invention concerne un extenseur tressé (1) destiné à l'implantation transluminale dans des lumières corporelles, qui est auto-extensible et possède une structure à extension radiale dans laquelle l'angle .alpha. entre les filaments est aigu. Certains des filaments (6, 7), sinon tous, sont soudés par paires au niveau de chacune des extrémités (4, 5) de l'extenseur de façon à constituer des perles (8) qui servent à renforcer l'extenseur et à faciliter son déploiement à partir d'un dispositif de pose. De préférence, l'extenseur est entièrement recouvert d'un revêtement polymère biocompatible, ledit polymère ayant de préférence des groupes de phosphorylcholine disponibles. L'invention se rapporte également à un procédé de fabrication dudit extenseur par entrelacement des filaments et soudure de même qu'à un dispositif de pose conçu pour le déploiement dudit extenseur.

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