Apparatus for delivering endoluminal prostheses and methods...

A - Human Necessities – 61 – F

Patent

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A61F 2/06 (2006.01)

Patent

CA 2422722

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 portion is transparent, allowing observation of the lumen (16) within the distal portion. The distal portion (18) terminates in a rounded distal tip including a plurality of leaflets (24) integrally molded thereto. A self-expanding stent (59) is disposed within the intermediate portion (20), and a bumper member (30) is slidably disposed within the lumen (16) proximate the stent (50). Before use, the sheath (12) is retracted to bump the stent (50) forward into the distal portion (18) until the stent is observed within the distal portion. After the apparatus (10) has been pre-loaded, the distal portion is advanced into a blood vessel, e.g., across a stenosis, 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.

L'invention concerne un appareil de distribution comprenant une gaine tubulaire comportant des parties proximales, intermédiaires et distales définissant un canal intérieur. Une paroi de la partie distale est transparente, permettant d'observer le canal intérieur dans la partie distale. La partie distale se termine en une pointe distale arrondie comprenant une pluralité de clapets moulés intégralement dedans. Un tuteur intravasculaire auto-extenseur est disposé dans la partie intermédiaire et un élément-tampon est monté coulissant dans le canal intérieur, à proximité du tuteur intravasculaire. Avant utilisation, la gaine est rentrée de manière à déplacer le tuteur intravasculaire vers l'avant dans la partie distale jusqu'à ce que ledit tuteur intravasculaire soit observé à l'intérieur de la partie distale. Une fois le dispositif pré-chargé, la partie distale est avancée dans un vaisseau sanguin, par ex. à travers une sténose et la gaine est rentrée, provoquant l'ouverture des clapets et permettant au tuteur intravasculaire de se déplier, ce dernier s'écartant alors pour dilater la sténose.

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