Cryogenic system
US7192426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | May 31, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B18/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cryosurgical system and method for supplying cryogen to a probe. The system including a container filled with cryogen and having bellows of a pump submerged within said cryogen. Conduits fluidly interconnect the bellows and a probe that is outside the container to permit the cryogen to be forced from the bellows to the probe upon activation of pump. A pressure relief valve is fluidly coupled to the conduits and positioned between the bellows and the probe. After initially forcing cryogen to the probe at a pressure that establishes a colligative-based sub-cooling of the liquid cryogen, the pressure relief valve is activated to lower the pressure of the cryogen to a running pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.