Refrigeration source for a cryoblation catheter

Details Refrigeration source for a cryoblation catheter Refrigeration source for a cryoblation catheter

2007-10-01

2009-08-11

Peffley, Michael (Department: 3739)

Surgery

Instruments

Cyrogenic application

C606S022000, C606S024000

Reissue Patent

active

RE040868

ABSTRACT:
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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