Catheter having controlled flexibility and method of...

A - Human Necessities – 61 – M

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A61M 25/00 (2006.01) B29C 47/02 (2006.01) B29C 47/06 (2006.01) B29C 47/28 (2006.01) B29C 70/50 (2006.01)

Patent

CA 2290996

A guiding catheter or angiographic catheter and method of manufacture for use in cardiovascular interventions which incorporates an annealed low-flexibility proximal zone wherein a transition zone separates the proximal zone and a high-flexibility distal zone. The catheter is subjected to a slicking operation to improve the smoothness of the high flexibility distal zone in order to better traverse the aortic arch shape while reducing excess energy storage. The proximal zone is annealed to provide a high level of stiffness for optimal support and pushability. A mid-region zone transitions the high stiffness of the proximal zone to the higher flexibility of the distal zone to eliminate buckling and kinking.

L'invention concerne un cathéter de guidage ou un cathéter pour angiographie et un procédé de fabrication à utiliser dans les interventions cardiovasculaires. Ledit cathéter comporte une zone proximale recuite à faible flexibilité, une zone de transition séparant la zone proximale et une zone distale de flexibilité élevée. Le cathéter est soumis à une opération de lissage qui permet d'améliorer la régularité de la zone distale à flexibilité élevée, ce afin d'assurer une meilleure traversée de l'arc de l'aorte et de réduire le stockage d'énergie excessif. Cette zone proximale est recuite de sorte qu'un niveau élevé de rigidité soit obtenu de manière qu'une caractérisque optimale de support et une capacité optimale à être poussé soient produites. Une zone médiane fait la transition entre la rigidité élevée de la zone proximale et la flexibilité élevée de la zone distale de sorte que le gondolage ou le tortillement soient éliminés.

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