A refrigeration source for a cryoablation catheter

Details A refrigeration source for a cryoablation catheter A refrigeration source for a cryoablation catheter

A - Human Necessities

61

B

A61B 18/02 (2006.01)

Patent

CA 2440777

A catheter-based system for performing a cryoablation procedure uses a precooler to lower the temperature of a fluid refrigerant to a sub-cool temperature (-40°C) at a working pressure (400 psi). The sub-cooled fluid is then introduced into a supply line of the catheter. Upon outflow of the primary fluid from the supply line, and into a tip section of the catheter, the fluid refrigerant boils at an outflow pressure of approximately one atmosphere, at a temperature of about -88°C. In operation, the working pressure is computer controlled to obtain an appropriate outflow pressure for the coldest possible temperature in the tip section.

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