Braided reinforced infusion catheter with inflatable membrane

Details Braided reinforced infusion catheter with inflatable membrane Braided reinforced infusion catheter with inflatable membrane

A - Human Necessities

61

M

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

Patent

CA 2212524

This is a surgical device particularly a perfusion catheter having an inflatablemembrane or balloon located at the distal end of the catheter shaft. The catheter shaft is comprised of an outer tubing assembly and an inner tubing assembly separated by an open annulus for inflating and deflating the inflatable membrane. The assembly may additionally comprise an inflatable membrane which is detachable. The outer tubing assembly is made up of at least one polymeric layer and a braid which may be polymeric or metallic, perhaps of a super-elastic alloy. At least a portion of the inner tubing assembly is made up of at least one polymeric layer and preferably a super-elastic metallic braid. The inner tubing assembly includes a lumen through which a guidewire may pass. It is further desirable that the inner tubing assembly include a coil member which generally is coextensive with the balloon along its axis. Thatlumen is preferably lined with a lubricious polymer. The outer tubing assembly allows the profile of the catheter to be minimized and yet provides significant resistance to the inner tubing assembly. The structure of the inner tubing assembly provides resistance to premature inflation during introduction of infusate through the inner lumen.

Instrument chirurgical, plus particulièrement un cathéter de perfusion constitué d'une membrane ou d'un ballonnet gonflable situé à l'extrémité distale de la tige du cathéter. Cette tige comprend un ensemble tube extérieur et un ensemble tube intérieur séparés par un espace annulaire ouvert, pour permettre de gonfler et de dégonfler la membrane. L'ensemble tube peut de plus comprendre une membrane gonflable amovible. L'ensemble tube extérieur est composé d'au moins une couche polymérique et d'un guipage polymérique ou métallique, peut-être d'un alliage super élastique. Au moins une partie de l'ensemble tube intérieur est composée d'au moins une couche polymérique et, préférablement, d'un guipage métallique super élastique. L'ensemble tube intérieur comprend une lumière par laquelle peut passer un fil-guide. Il est en outre souhaitable que l'ensemble tube intérieur comprenne une spirale généralement coextensible avec le ballonnet, le long de son axe. La lumière est préférablement doublée d'un polymère glissant. L'ensemble tube extérieur permet de réduire le contour du cathéter, tout en assurant une résistance considérable à l'ensemble tube intérieur. La structure de l'ensemble tube intérieur permet de supporter un gonflement prématuré durant l'introduction d'une solution intraveineuse dans la lumière intérieure.

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