Method and device for transmyocardial cryo revascularization
US5885276A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1997 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Dec 2, 2017 |
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 to form durable transmyocardial channels without causing considerab…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.