Stent and method for manufacturing the stent

Details Stent and method for manufacturing the stent Stent and method for manufacturing the stent

A - Human Necessities

61

F

A61F 2/06 (2006.01)

Patent

CA 2578102

A stent includes a stent body (1) with a diameter of between approximately 4 and 12 mm and a length of between approximately 10 and 250 mm. S-shaped struts (5) are disposed helically about the circumference along helical turns. The struts have straight portions (6) and curved portions (7) connecting respectively adjacent ones of the straight portions. Bridges (8,9) connect the struts in adjacent ones of the turns. The bridges include connecting bridges and a given number of sacrificial bridges before being expanded, and the connecting bridges and less than the given number of the sacrificial bridges after being at least partially expanded. A method for manufacturing a helical stent includes the steps of providing a stent body with struts disposed about the circumference thereof in turns and with bridges connecting the struts in adjacent turns. The stent body is expanded and, thereafter, some of the bridges, in particular, sacrificial bridges, are removed.

Un extenseur comprend un corps de l'extenseur (1) ayant un diamètre compris entre environ 4 et 12 mm et une longueur comprise entre environ 10 et 250 mm. Des entretoises en S (5) sont disposées hélicoïdales sur la circonférence le long des spires. Les entretoises comprennent des parties droites (6) ou incurvées (7) raccordant respectivement les parties droites adjacentes. Des ponts (8,9) relient les entretoises dans les spires adjacentes. Avant le déploiement, les ponts comprennent des ponts de raccordement et un nombre donné de ponts consommables; et, après un déploiement au moins partiel, des ponts de raccordement et un nombre de ponts consommables inférieur au nombre donné. Un procédé de fabrication d'un extenseur hélicoïdal comprend les stades qui consistent à fournir un corps de l'extenseur avec des entretoises disposées sur sa circonférence dans les spires et avec des ponts raccordant les entretoises dans les spires adjacentes. Le corps de l'extenseur est déployée, et certains ponts, notamment les ponts consommables, sont retirés.

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