A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/90 (2006.01)
Patent
CA 2378920
Medical devices may be made of shape-memory materials portions of which have been heat treated to exhibit spatial variations in the stiffness of the material. Devices including stents, vena cava filters and guidewires may be constructed from such materials. Devices may also be made from shape-memory materials which have been locally heat treated such that the superelasticity of the treated portion is destroyed while the remainder of the shape-memory material can transition between the martensitic and austenitic states.
La présente invention concerne des dispositifs médicaux pouvant être constitués de parties en matériaux à mémoire de forme ayant subit un traitement thermique permettant d'obtenir des variations spatiales de la rigidité du matériau. Les dispositifs qui comprennent les endoprothèses, les filtres caves, les fils-guides, peuvent être réalisé à partir de ces matériaux. Des dispositifs peuvent également être faits de matériaux à mémoire de forme qui ont subit un traitement thermique local de sorte que la superélasticité de la partie traitée thermiquement est éliminée alors que le reste du matériau à mémoire de forme peut passer de l'état martensitique à l'état austénitique et inversement.
Dicarlo Paul
Walak Steven
Boston Scientific Limited
Piasetzki Nenniger Kvas Llp
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