Peripheral overlap stent

Details Peripheral overlap stent Peripheral overlap stent

A - Human Necessities

61

F

A61F 2/90 (2006.01)

Patent

CA 2714775

A peripheral stent with individual segments reduces the occurrence of fatigue fracture failure seen in vessels and tubes having bending and twisting movement. Segments can be attached via connecting fibers that biodegrade and offer the seg-ments freedom of movement. The segments are balloon-expandable but will not be crushed by external forces placed upon the stent. Hinges and struts provide the stent with a plastic deformation during expansion and remain elastic if exposed to an oval shape. The segments overlap each other to provide improved scaffolding of the vessel wall and a greater flexibility during deliv-ery. A composite stent having both balloon-expandable and self-expanding character has application in the venous system.

La présente invention concerne un stent périphérique avec des segments individuels, qui réduit loccurrence des échecs dans le cas de fractures de fatigue dans des vaisseaux et des tubes qui présentent une flexion et un mouvement de torsion. Des segments peuvent être fixés par le biais de fibres de raccordement biodégradables qui offrent une certaine liberté de mouvement aux segments. Lesdits segments sont expansibles par ballon, mais ne peuvent pas être écrasés par des forces externes appliquées sur le stent. Des charnières et des entretoises fournissent au stent une déformation plastique durant lexpansion, et restent élastiques si elles sont exposées à une forme ovale. Les segments se chevauchent les uns les autres afin de fournir un échafaudage amélioré de la paroi du vaisseau et une plus grande souplesse lors de la pose. Un stent composite à la fois expansible par ballon et auto-expansible peut sutiliser dans le système veineux.

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