Preshaped ablation catheter for ablating pulmonary vein...

A - Human Necessities – 61 – M

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A61M 25/01 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2584549

Catheters are provided for performing medical procedures, such as tissue ablation, adjacent the ostia of anatomical vessels, such as pulmonary veins. The catheter comprises an elongated flexible integrated catheter body having proximal and distal shaft portions and at least one operative element carried by the distal shaft portion. The distal shaft portion has a proximal section configured to be internally actuated (e.g., using a steering mechanism or pre- shaping the proximal section) to form a simple curve with an apex that can be inserted into the vessel ostium, an intermediate section pre-shaped to form a curve that bends opposite the simple curve, and a distal section configured to be placed into a non-radial relationship (tangential or oblique) with the vessel ostium when the apex of the simple curve is inserted into the vessel ostium.

L'invention concerne des cathéters destinés à réaliser des opérations médicales, telles qu'une ablation de tissu, au voisinage des orifices de vaisseaux anatomiques tels que les veines pulmonaires. Ce cathéter comprend un corps de cathéter intégré souple allongé possédant des parties de tige proximale et distale et au moins un élément de fonctionnement supporté par la partie de tige distale. La partie de tige distale comporte une section proximale conçue pour être actionnée intérieurement (par ex., au moyen d'un mécanisme d'orientation ou par préformage de la section proximale) en vue de la formation d'une courbe simple présentant un sommet pouvant être inséré dans l'orifice du vaisseau, une section intermédiaire préformée en vue de la formation d'une courbe opposée à la courbe simple, ainsi qu'une section distale conçue pour être placée en relation non radiale (tangentielle ou oblique) par rapport à l'orifice du vaisseau lorsque le sommet de la courbe simple est inséré dans l'orifice du vaisseau.

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