Endovascular prosthesis
AssigneesMDB Texinov SA, Deltaval
InventorsJacques Tankere, Eric Mignot, Franck Ott
Life of this patent
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Abstract
This vascular stent graft (1) is formed of a tubular knitted textile structure, integrating within the meshes of said knitted textile structure at least one helical continuous weft yarn (3) extending all along the major dimension of the stent graft. Said at least one stent graft (3) is made of a shape memory alloy having previously been submitted to such an education, and in particular such a thermomechanical treatment that, at the human body temperature, said yarn gives the structure its tubular shape by superelasticity or shape memory effect.
Claims15
A vascular stent graft formed of a tubular knitted textile structure, integrating within meshes of said knitted textile structure at least one helical continuous weft yarn extending all along a major dimension of the stent graft, said at least one yarn being made of a shape memory alloy having previously been submitted to a thermomechanical treatment, such that, at the human body temperature, said yarn gives the structure its tubular shape by superelasticity or shape memory effect.
A method of forming a vascular stent graft, comprising:
- forming by warp stitch knitting on a double needle bed loom two textile layers joined together at the level of edges of said layers oriented in a production direction of said loom to later define a tubular structure;
- and inserting a continuous weft made of a shape memory yarn at the level of the double needle bed, inserting into the meshes on said two layers with an offset in the production direction, the continuous weft being conveyed to the level of the needle beds by revolution around said beds, typically helically with respect to the production direction of the loom.
Dependencies are inferred from the claim text.