Method and device for trans myocardial cryo revascularization
US5993444A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jul 30, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2309/021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Cryosurgery method and device for performing trans myocardial revascularization are provided. The method includes: forming trans myocardial channels by cryoablating selected portions of the myocardial tissue. The cryosurgery device includes: (a) an operating member having an operating surface and a hollow, and a housing member connected thereto; (b) a first passageway extending along the device for providing high pressure gas to the operating member, the first passageway including a primary Joule Thomson heat exchanger in the form of a primary orifice located on the first passageway for enabling expansion of gas within the hollow of the operating member, thereby providing a desired temperature to the surface of the operating member; (c) a second passageway extending through the length of the housing member for evacuating gas from the operating tip to atmosphere; (d) a third passageway extending along a portion of the device and including a secondary Joule Thomson heat exchanger for providing a desired temperature to gas flowing through the first passageway. Method and device according to the present invention enable the formation of durable transmyocardial channels without causing …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.