Surgery – Instruments – Cyrogenic application
Patent
1998-07-30
1999-11-30
Dvorak, Linda C. M.
Surgery
Instruments
Cyrogenic application
606 22, 606 23, A61B 1736
Patent
active
059934441
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 considerable trauma to the myocardial tissue.
REFERENCES:
patent: 5254116 (1993-10-01), Baust et al.
patent: 5716353 (1998-02-01), Matsuura et al.
patent: 5853368 (1998-12-01), Soloman et al.
patent: 5893848 (1999-04-01), Negus et al.
Ammar Rony
Bliweis Mordechai
Ofer Glinka
Sturlesi Gideon Even
Dvorak Linda C. M.
Friedman Mark M.
Galil Medical Ltd.
Gibson Roy
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