Indwelling heat exchange catheter and method of using same

A - Human Necessities – 61 – F

Patent

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Details

A61F 7/12 (2006.01) A61F 7/00 (2006.01) A61M 25/00 (2006.01) A61B 18/02 (2006.01) A61M 1/36 (2006.01)

Patent

CA 2340237

A catheter is adapted to exchange heat with a body fluid, such as blood, flowing in a body conduit, such as a blood vessel. The catheter includes a shaft with a heat exchange region disposed at its distal end. This region may include hollow fibers which are adapted to receive a remotely cooled heat exchange fluid preferably flowing in a direction counter to that of the body fluid. The hollow fibers enhance the surface area of contact, as well as the mixing of both the heat exchange fluid and the body fluid. The catheter can be positioned to produce hypothermia in a selective area of the body or alternatively positioned to systemically cool the entire body system.

L'invention se rapporte à une sonde conçue pour échanger de la chaleur avec un fluide corporel, tel que le sang, qui s'écoule dans un conduit corporel, tel qu'un vaisseau sanguin. Ladite sonde comporte une tige dotée d'une région échangeuse de chaleur située au niveau de son extrémité distale. Cette région peut comporter des fibres creuses qui sont conçues pour recevoir un fluide échangeur de chaleur refroidi à distance, qui s'écoule de préférence dans une direction inverse à celle du fluide corporel. Les fibres creuses augmentent l'aire de la surface de contact et accentuent l'échange thermique entre le fluide échangeur thermique et le fluide corporel. Ce cathéter peut être positionné de manière à produire une hypothermie dans une zone sélectionnée du corps ou bien être positionné de manière à refroidir systématiquement l'ensemble du système corporel.

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