Eptfe crimped graft

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01)

Patent

CA 2497702

The present invention provides an expanded tubular graft formed of expanded polytetrafluoroethylene (ePTFE).The graft has first (14) and second (16) open ends and a suface longitudinally extending between the ends. The graft also includes an inner (12a, 34) and outer (12b, 36) cylindrical walls, where the walls have crimps located along the surface of the graft. Additionally, the graft is coated with biocompatible elastomer covering portions of the outer cylindrical walls of the PTFE graft. The resulting ePTFE crimped graft exhibits various enhanced properties,such as adjustable graft length, high kink resi stance, improved suture retention and high crush resistance as compared to the same graft without the crimps.

L'invention concerne une greffe tubulaire expansée formée d'un PTFE expansé. Ladite greffe présente une première et une seconde extrémité ouverte et une surface s'étendant longitudinalement entre les extrémités. Ladite greffe comprend une paroi cylindrique interne et externe, ces dernières présentant des sertissures situées le long de la surface de la greffe. De plus, ladite greffe est recouverte par un élastomère biocompatible qui couvre des parties des parois externes cylindriques de la greffe en PTFE. La greffe sertie en PTFE expansé résultante présente de nombreuses propriétés améliorées, telles qu'une longueur de greffe réglable, une grande résistance à la pliure, une rétention à la suture améliorée, et une grande résistance à la déformation par rapport à la même greffe sans sertissures.

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