Stent delivery devices and methods

Details Stent delivery devices and methods Stent delivery devices and methods

A - Human Necessities

61

M

A61M 29/00 (2006.01) A61F 2/04 (2006.01) A61M 11/00 (2006.01)

Patent

CA 2538165

Stent delivery devices and methods include a shuttle for carrying multiple stent segments, to avoid direct contact between the stent segments and an expandable member. A sheath is disposed over the expandable member such that when it is withdrawn, a distal portion of the expandable member is exposed to expand against the shuttle, thus expanding the shuttle and expanding and deploying a selected number of stent segments. To deploy a second selected number of stent segments, the sheath may be withdrawn further to expose more of the expandable member. Thus, one or more custom length stents may be deployed with a reduced risk of damage to the expandable member and the stent segments and enhanced ease and accuracy of stent placement at a treatment location.

Les dispositifs et procédés de pose de stent de la présente invention mettent en oeuvre, d'une part une navette permettant d'emporter plusieurs segments de stent, de façon à éviter tout contact direct entre les eux, et d'autre part un élément déployable. Cet élément déployable est recouvert d'une gaine faisant, qu'au retrait, son extrémité distale se découvre et se déploie contre la navette, ce qui la déploie, et vient déployer et allonger le nombre voulu de segments de stent. Pour déployer un deuxième nombre voulu de segments de stent, on peut continuer à retirer la gaine pour découvrir encore plus l'élément expansible. Cela permet de déployer un ou plusieurs stents de longueur adaptée, en risquant moins d'endommager l'élément expansible et les segments de stent, tout en permettant une pose plus facile et précise du stent à l'emplacement à traiter.

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