Improved lumen design for catheter

Details Improved lumen design for catheter Improved lumen design for catheter

A - Human Necessities

61

F

A61F 7/00 (2006.01) A61F 7/12 (2006.01)

Patent

CA 2396760

The invention provides a device for heating or cooling a surrounding fluid in a feeding vessel and a method of manufacturing the same. The device includes a catheter assembly (400) capable of insertion to a selected blood vessel in the vascular system of a patient. The assembly includes an elongated catheter body, a heat transfer element (404) located at the distal end of the catheter and including an interior (410), an elongated supply lumen (442) adapted to deliver a working fluid to the interior of the heat transfer element and having a hydraulic diameter (D2), an elongated return lumen (436) for the working fluid having a hydraulic diameter (D3), and wherein the ratio of the hydraulic diameter of the return to the supply lumen is equal to 0.75.

L'invention concerne un dispositif permettant de chauffer ou de refroidir un fluide environnant dans un vaisseau nourricier. et un procédé de fabrication dudit dispositif. Ce dispositif comprend un ensemble cathéter (400) pouvant être inséré dans un vaisseau sanguin choisi du système vasculaire d'un patient. L'ensemble comprend un corps de cathéter de forme allongée, un élément de transfert de chaleur (404) situé à une extrémité distale de l'ensemble cathéter, lequel élément de transfert de chaleur comprend une lumière intérieure (410), une lumière d'alimentation de forme allongée (442) conçue de manière à distribuer un fluide de travail à l'intérieur de l'élément de transfert de chaleur et possédant un diamètre hydraulique (D2), une lumière de retour de forme allongée (436) destiné au fluide de travail possédant un diamètre hydraulique (D3), le rapport entre le diamètre hydraulique de la lumière de retour et de la lumière d'alimentation équivalant à 0,75.

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