Refrigeration source for a cryoblation catheter
USRE40868E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2007 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Oct 1, 2027 |
Classification
- Technology area (CPC —)General
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.