Drug-delivery endovascular stent and method of use

A - Human Necessities – 61 – L

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A61L 31/16 (2006.01) A61F 2/06 (2006.01) A61L 31/02 (2006.01)

Patent

CA 2667061

An improvement in drug-eluting stents, and method of their making are disclosed. The surface of a metal stent is roughened to have a surface roughness of at least about 20 µin (0.5 µm) and a surface roughness range of between about 300-700 µin (7.5-17.5 µm). The roughened stent surface is covered with a polymer-free coating of a limus drug, to a coating thickness greater than the range of surface roughness of the roughened stent surface.

L'invention concerne une amélioration apportée à des endoprothèses d'élution pharmacologique, et leur procédé de fabrication. La surface d'une endoprothèse métallique est rigidifiée de manière à obtenir une rugosité superficielle d'au moins environ 0,5 µm (20 µpo) et une gamme de rugosités superficielles située entre environ 7,5 et 17,5 µm (300 et 700 µpo). La surface rigidifiée de l'endoprothèse est recouverte d'un revêtement dépourvu de polymère et constitué d'un médicament de la famille des <= limus >=, l'épaisseur de ce revêtement étant supérieure à la gamme des rugosités superficielles de la surface rigidifiée de l'endoprothèse.

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