Apparatus for delivering endoluminal prosthesis and methods...

A - Human Necessities – 61 – F

Patent

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A61F 2/06 (2006.01)

Patent

CA 2484072

A delivery apparatus (10) includes a tubular sheath (12) including proximal, intermediate (20), and distal (18) portions defining a lumen (16). A wall of the distal (18) portion is transparent, allowing observation of the lumen within the distal portion. The distal portion terminates in a rounded distal tip (14) including a plurality of leaflets (24). A self-expanding stent (50) is disposed within the intermediate portion (20), and a bumper member (30) is slidably disposed within the lumen (16) proximate the stent. Before use, the sheath (12) is retracted to bump the stent (50) forward into the distal portion until the stent (50) is observed within the distal portion (18). After the apparatus has been pre-loaded, the distal portion (18) is advanced into a blood vessel (100), e.g., across a stenosis (102), and the sheath (12) is retracted, causing the leaflets (24) to open and allow the stent (50) to be deployed, whereupon the stent (50) automatically expands to dilate the stenosis (102).

L'invention concerne un dispositif délivrant (10) une endoprothèse, qui comprend un manchon tubulaire (12) à parties proximale, intermédiaire (20), et distale (18) définissant une lumière (16). Une paroi de la partie distale (18) est transparente, permettant d'observer la lumière dans la partie distale, laquelle se termine par une extrémité distale arrondie (14) comprenant plusieurs clapets (24). Une endoprothèse autoextensible (50) est placée dans la partie intermédiaire (20), et un poussoir (30) est placé coulissant dans la lumière (16) à proximité de l'endoprothèse. Avant l'utilisation, le manchon (12) est rétracté, poussant ainsi l'endoprothèse (50) vers l'avant dans la partie distale, jusqu'à l'observation de l'endoprothèse (50) dans la partie distale (18). Une fois le dispositif préchargé, la partie distale (18) est avancée dans un vaisseau sanguin (100), par exemple au-delà d'une sténose (102), et le manchon (12) est rétracté, entraînant l'ouverture des clapets (24) et le déploiement de l'endoprothèse (50), laquelle s'étend automatiquement pour dilater la sténose (102).

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