Stent deploying catheter system and balloon catheter

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/00 (2006.01) A61F 2/06 (2006.01) A61L 29/00 (2006.01) A61L 29/04 (2006.01)

Patent

CA 2292576

An intravascular catheter system for properly implanting a stent in a body lumen generally comprising a catheter having an elongated shaft with an inflatable balloon formed of compliant material and a stent mounted on the working length of the balloon. The balloon material is compliant within the working range of the balloon to provide substantial radial expansion. The wingless radially expansive balloon expands in a uniform manner, thereby producing uniform expansion and implantation of the stent. Another embodiment is directed to a balloon catheter having a semi-compliant balloon formed at least in part of a block copolymer. Axial elongation during inflation may be prevented by axial stretching or orientation during balloon production process or by mechanical device fitted on the catheter.

On décrit un ensemble cathéter intravasculaire qu'on utilise pour implanter correctement un extenseur dans une lumière du corps. L'ensemble cathéter se compose généralement d'un cathéter à manche allongé comprenant un ballonnet gonflable en matériau souple, et d'un extenseur monté sur la longueur utile du ballonnet. Le matériau de confection du ballonnet est souple sur la partie correspondant à l'espace de travail du ballonnet pour conférer une extension radiale considérable. Le ballonnet lisse accomplit une expansion radiale uniforme, ce qui permet un déploiement et une implantation uniformes de l'extenseur. Dans une autre forme de réalisation, on décrit un cathéter à ballonnet équipé d'un ballonnet semi souple formé au moins partiellement d'un copolymère bloc. On peut empêcher une élongation axiale pendant le gonflage en effectuant un allongement ou une orientation axial(e) pendant le processus de production du ballonnet, ou au moyen d'un dispositif mécanique qu'on fixe au cathéter.

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