Cooling tissue inside the body

Details Cooling tissue inside the body Cooling tissue inside the body

A - Human Necessities

61

F

A61F 7/12 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2575783

A catheter (10) for cooling blood includes a tubular shaft (12) with a lumen extending longitudinally through a portion of the member. The lumen has an entry port (18) and an exit port (20) through which blood from a body vessel may enter and exit the lumen. An inflatable balloon (14) is positioned between the entry and exit ports of the lumen, which when inflated, occludes the body vessel and prevent normal blood flow. A cooling element cools blood as it flows through the lumen. The cooling element may include a chamber that cools the blood by using a Joule-Thompson orifice to create a phase change of liquid to a gas. The cooling element may also include a thermoelectric cooler.

Un cathéter (10) pour refroidir le sang comprend un tube (12) avec une lumière disposée longitudinalement sur une partie de l'élément. La lumière a un port d'entrée (18) et un port de sortie (20) à travers lesquels le sang d'un vaisseau du corps peut entrer et sortir de la lumière. Un ballon gonflable (14) est positionné entre les ports d'entrée et de sortie de la lumière, qui lors du gonflage, obstrue le vaisseau du corps et empêche le débit normal du sang. Un élément refroidisseur rafraîchit le sang lorsqu'il coule à travers la lumière. L'élément refroidisseur peut comprendre une chambre qui refroidit le sang en utilisant un orifice Joule-Thompson pour créer un changement de phase de liquide à gaz. L'élément refroidisseur peut aussi comprendre un refroidisseur thermoélectrique.

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