Stent device with multiple helix construction

Details Stent device with multiple helix construction Stent device with multiple helix construction

A - Human Necessities

61

F

A61F 2/06 (2006.01)

Patent

CA 2497701

An improved stent design (20) is disclosed that employs a series of helically oriented expansion elements (22a, 22b, 22c) encircling the stent. Each of the expansion elements includes a stepped pattern employing two distinct pitch angles (30, 36). The expansion elements are oriented to cooperate with each other to form a series of virtual radially expandable rings (40) that provide suitable outward force for proper stent function, but which are not connected together to form a continuous coherent ring if separated from the stent as a whole. In this manner, a distinctive stent design is provided that has numerous functional benefits over stents described in the prior art.

Cette invention a trait à un stent amélioré (20), comprenant une série d'éléments de dilatation orientés en hélice (22a, 22b, 22c) et enveloppant le stent. Chacun de ces éléments de dilatation forme une configuration en étages à deux angles de pas distincts (30, 36). Ces éléments sont orientés de façon à coopérer les uns avec les autres afin de former une série d'anneaux virtuels se dilatant radialement (40), ce qui permet d'obtenir une force de sollicitation appropriée dirigée vers l'extérieur aux fins d'un fonctionnement convenable du stent, mais ils ne sont, toutefois, pas connectés ensemble pour former un anneau cohérent continu s'il existe une séparation d'avec le stent dans son ensemble. On obtient, de la sorte, un stent particulier présentant de nombreux avantages par rapport aux stents relevant de la technologie antérieure à l'invention.

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