Small diameter, high torque catheter

Details Small diameter, high torque catheter Small diameter, high torque catheter

A - Human Necessities

61

M

A61M 25/00 (2006.01) F16L 11/08 (2006.01)

Patent

CA 2176389

A catheter (10) comprises an inner tubular member (30), a braided reinforcement layer (32) and a soft outer layer (34). The inner tubular member (30) extends from a proximal end of the catheter (10) to a first distal location (18). The braided reinforcement layer (32) extends from the proximal end of the catheter to a second distal location (22) which is usually located proximally from the first distal location (18). The soft outer layer (34) extends from the proximal end of the catheter to a third distal location which is usually located distally of the first distal location (18). In this way, a catheter (10) having a shaft region (16), a transition region (20), and a distal region (26), each with different strength and flexibility characteristics, can be obtained. Such catheter constructions are particularly useful for very small diameter access catheters.

Un cathéter (10) comporte un élément tubulaire intérieur (30), une couche de renfort tressée (32) et une couche extérieure souple (34). L'élément tubulaire intérieur (30) s'étend d'une extrémité proximale du cathéter (10) à un premier point distal (18). La couche de renfort tressée (32) s'étend de l'extrémité proximale du cathéter à un second point distal (22), dont la position est habituellement proximale par rapport au premier point distal (18). La couche extérieure souple (34) s'étend de l'extrémité proximale du cathéter à un troisième point distal, dont la position est habituellement distale par rapport au premier point distal (18). Il est ainsi possible d'obtenir un cathéter (10) pourvu d'une partie formant corps (16), d'une partie de transition (20) et d'une partie distale (26), qui ont chacune des caractéristiques de résistance et de souplesse différentes. Ces constructions de cathéter sont particulièrement utiles pour les cathéters d'accès de très petit diamètre.

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