Catheter having articulation system

Details Catheter having articulation system Catheter having articulation system

A - Human Necessities

61

M

A61M 25/01 (2006.01) A61B 18/02 (2006.01) A61M 25/16 (2006.01) A61B 17/00 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2427412

An articulation system for catheter steering and selective positioning of the catheter distal tip includes an articulation segment having a cylindrically shaped wall that is attached between a tip member and a catheter tube. The cylindrically shaped wall defines a longitudinal axis and surrounds a central lumen. The wall of the articulation segment is formed with a first section made of a first material having flexure! modulus, M1, -and a second section made of a second material having flexural modules, M2, with M2 being larger than M1 (M2 > M1). One end of a control wire is attached to the tip member, while the control wire itself extends from the tip member, through the lumen of the articulation segment and through the catheter tube. The sections are arranged to cause the tip member to deflect in a pre-selected plane in response to axial movements of the control wire.

Un système d'articulation destiné à orienter un cathéter et à placer dans une position particulière l'embout distal du cathéter comprend un élément d'emboîtement doté d'une paroi cylindrique reliant l'embout et le tube du cathéter. La paroi de forme cylindrique définit un axe longitudinal et entoure la lumière. La paroi de l'élément d'emboîtement est formé d'une première section composée d'une première matière munie d'un module en flexion, M1, et d'une deuxième section composée d'une deuxième matière pourvue d'un module en flexion, M2, M2 étant plus imposant que M1 (M2 > M1). L'une des extrémités d'un fil de commande est fixée à l'embout et le fil lui- même se prolonge à partir de l'embout, traverse la lumière de l'élément d'emboîtement et le cathéter. Les sections sont disposées de façon à faire dévier l'embout dans un plan prédéterminé en réponse aux mouvement axiaux du fil de commande.

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