Cryogenic device, system and method of using same
US6241722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1998 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Jun 17, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0463
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a cryogenic device and system for treating biological tissue, which includes at least two media-flow lumens and a media-expansion element for cooling media flowing within the device. A cooling portion of the device is located along a portion of one of the media-flow lumens. The cooling portion is of a construction suitable for good contact with tissue selected for treatment. Preferably, the device and system employ one or more closed media-flow pathways for efficient recycling of the media employed. Preferably, the device and system also employ efficacious heat-exchange relationships between media-flow conduits for optimal cooling. The device and system are particularly designed for the formation of lesions in biological tissue, most particularly, the formation of deep, elongated and continuous lesions in cardiopulmonary tissue. The present invention also provides a method of using the cryogenic device and system in the treatment of biological tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.