Heat exchange catheter with discrete heat exchange elements

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/18 (2006.01) A61F 7/12 (2006.01)

Patent

CA 2382328

This invention is a catheter (50) including a main shaft (52), and a heat exchange region (56) having a plurality of heat exchange elements (58) each having a length, opposed ends being attached on at least one of its ends to the shaft,and disposed so that when inserted in a fluid body cavity with fluid, the body fluid may circumferentially surround each heat exchange element. The catheter includes a fluid circulation path therein, which desirably includes a hollow lumen within each of the heat exchange elements. The heat exchange elements may be connected at two points along the shaft using manifolds (70, 72). Alternatively, the heat exchange elements may be connected at only one point and be permitted to float. An insulating member, such as a balloon (204), may be provided along the shaft, and ribs (204) may be provided on each of the heat exchange elements.

L'invention concerne un cathéter (50) comprenant une tige principale (52) et une zone d'échange thermique (56) comportant plusieurs éléments d'échange thermique (58) ayant une certaine longueur et des extrémités opposées, fixés par au moins une extrémité à la tige et disposés de façon qu'une fois introduits dans une cavité corporelle fluide contenant du fluide, le fluide corporel puisse entourer chaque élément d'échange thermique. Le cathéter comporte une voie de circulation de fluide, qui comporte de préférence une lumière creuse dans chaque élément d'échange thermique. Les éléments d'échange thermique peuvent être reliés à deux points le long de la tige au moyen de collecteurs (70, 72). Les éléments d'échange thermique peuvent éventuellement être reliés à un point unique et disposés de façon à flotter. Un élément d'isolation, tel qu'un ballon (204), peut être disposé le long de la tige, et les éléments d'échange thermique peuvent comporter des nervures (204).

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