Surgery – Instruments – Heat application
Patent
1997-04-25
1999-03-09
Nasser, Robert L.
Surgery
Instruments
Heat application
606 27, 606 29, 606 31, 606 41, 606 42, 606 48, 606194, 604113, 604114, 607101, A61B 1738
Patent
active
058793470
ABSTRACT:
An apparatus for treating body tissue using controlled application of heat includes an catheter having an expandable device defining a fluid reservoir about the distal end of the catheter. Fluid is provided to the fluid reservoir through a fluid supply conduit, and fluid drains from the fluid reservoir via a fluid drainage conduit. The apparatus includes a first pressure control valve that controls the outflow of fluid through the fluid drainage conduit, so that fluid pressure within the fluid reservoir is maintained within a desired range. The apparatus may also include a second pressure control valve that drains the fluid reservoir in case of an overpressure, such as may occur upon failure of the first pressure control valve. The apparatus may also include an electrical heating element disposed at the distal end of the catheter within the fluid reservoir, with current flow through heating element controlled by simple temperature switches that are also disposed at the distal end of the catheter within the fluid reservoir.
REFERENCES:
patent: 4116201 (1978-09-01), Shah
patent: 4793351 (1988-12-01), Landman
patent: 5498261 (1996-03-01), Strul
Astorino Michael
Gynecare, Inc.
Nasser Robert L.
Skula Emil Richard
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