Selective organ hypothermia method and apparatus

Details Selective organ hypothermia method and apparatus Selective organ hypothermia method and apparatus

A - Human Necessities

61

B

A61B 18/02 (2006.01) A61F 7/12 (2006.01) A61B 17/00 (2006.01) A61F 7/00 (2006.01)

Patent

CA 2318084

The present invention is a method, and apparatus for performing hypothermia of a selected body organ without significant effect on surrounding organs or other tissue. A flexible catheter (10) is inserted through the vascular system of a patient to place the distal tip (26) of the catheter in an artery feeding the selected organ. A compressed refrigerant is pumped through the catheter to an expansion element (22) near the distal tip of the catheter, where the refrigerant vaporizes, and expands to cool a flexible heat transfer element (24) in the distal tip of the catheter. The heat transfer element cools the blood flowing through the artery to cool the selected organ, distal to the tip of the catheter.

L'invention concerne un procédé et un dispositif servant à mettre en hypothermie un organe corporel sélectionné sans exercer d'effet conséquent sur les organes situés à proximité ou sur d'autres tissus. On insère un cathéter souple (10) à travers le système vasculaire d'un patient, de manière à placer la pointe distale (26) du cathéter dans une artère alimentant l'organe sélectionné. On pompe un réfrigérant sous pression à travers le cathéter vers un élément de dilatation (11) situé à proximité de la pointe distale du cathéter, dans lequel ce réfrigérant se vaporise et se dilate, de façon à refroidir un élément souple de transfert de chaleur (24) placé dans la pointe distale du cathéter. Cet élément de transfert de chaleur refroidit le sang s'écoulant à travers l'artère afin de refroidir l'organe sélectionné, en position distale par rapport à la pointe du cathéter.

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