Low pressure stent

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/02 (2006.01) A61F 2/04 (2006.01) A61F 2/06 (2006.01) A61F 11/00 (2006.01)

Patent

CA 2315731

The present invention is directed to an expandable stent (10) which is relatively flexible along its logitudinal axis to facilitate delivery through tortuous body lumens, but which is stiff, and stable enough radially in an expanded condition to maintain the patency of a body lumen such as an artery when implanted therein. The struts (50) of the present invention have a specific trapezoidal (54), triangular (56), or a reduced radii (58) configuration projecting radially outward that functions to reduce the forces necessary to penetrate the vessel wall thereby minimizing trauma or damage imparted to the wall during deployment. In addition, this design feature of the present invention helps secure the expanded stent so that it does not move once it is implanted, and furthermore minimizes projections into the blood stream.

L'invention concerne un extenseur dépliant (10) qui possède une certaine souplesse sur son axe longitudinal, ce qui facilite son introduction à travers des lumières sinueuses du corps, mais qui est cependant rigide et possède à l'état déplié une stabilité radiale suffisante au maintien de la perméabilité d'une lumière de corps telle qu'une artère lorsque l'extenseur y est implanté. Les tiges (50) de la présente invention possèdent une forme appropriée en trapèze (54), en triangle (56) ou en rayons limités (58) qui font saillie radialement vers l'extérieur et fonctionnent de manière à réduire la force nécessaire pour pénétrer dans le vaisseau, ce qui a pour effet de limiter le traumatisme ou les dommages causés à la paroi pendant le déploiement. En outre, cette particularité de l'invention permet de fixer l'extenseur déplié de manière à ce que celui-ci ne bouge plus une fois implanté ainsi que de réduire davantage les protubérances s'opposant au flux sanguin.

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