High torque balloon catheter

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/10 (2006.01) A61L 29/00 (2006.01) A61M 25/00 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2205666

A balloon catheter (2) comprises an outer sheath (3) housing an inner catheter (10). The inner catheter comprises an inner tubular member (30), a braided reinforcement layer (32), and a soft outer layer (34). The inner tubular member extends from a proximal end (15) of the inner catheter to a first distal location (22). The braided reinforcement layer extends from the proximal end to a second distal location (18), usually located proximal of the first distal location. The soft outer layer extends from the proximal end of the inner catheter to the tip (44) of the inner catheter. In this way, a catheter having a shaft region (16), a transition region (20), and a distal region (24), each with different strength and flexibility characteristics, can be used with the outer sheath. The balloon (8) is bonded to the distal ends of the outer sheath and the inner catheter and is inflated through the space defined therebetween.

Un cathéter à ballonnet (2) se compose d'une gaine extérieure (3) contenant un cathéter intérieur (10). Ce dernier comprend un élément tubulaire intérieur (30), une couche de renforcement tressée (32) et une couche extérieure souple (34). L'élément tubulaire intérieur s'étend d'une extrémité proximale (15) du cathéter intérieur à un premier point distal (22). La couche de renforcement tressée s'étend de l'extrémité proximale à un second point distal (18), situé habituellement en amont du premier. La couche extérieure souple est comprise entre l'extrémité proximale du cathéter intérieur et le bout (44) de ce même cathéter. Ce procédé permet d'utiliser avec la gaine extérieure un cathéter comprenant une région en forme de tige (16), une région de transition (20) et une région distale (24), chacune de ces régions ayant des caractéristiques différentes concernant leur résistance et leur flexibilité. Le ballonnet (8) du cathéter est fixé aux extrémités distales de la gaine extérieure et du cathéter intérieur. Son gonflage s'effectue par l'espace défini entre ces derniers.

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