Surgery – Instruments – Cyrogenic application
Reexamination Certificate
2005-12-06
2005-12-06
Gibson, Roy D. (Department: 3739)
Surgery
Instruments
Cyrogenic application
C606S022000, C251S129220
Reexamination Certificate
active
06972015
ABSTRACT:
Improved systems, devices, and methods for delivering cryogenic cooling fluid to cryosurgical probes such as cryosurgical endovascular balloon catheters take advantage of the transients during the initiation and termination of cryogenic fluid flow to moderate the treatment temperatures of tissues engaged by the probe. A flow limiting element along a cryogenic fluid path intermittently interrupts the flow of cooling fluid, often cycling both the fluid flow and treatment temperature. This can maintain the tissue treatment temperature within a predetermined range which is above the treatment temperature provided by a steady flow of cryogenic fluid. In another aspect, room temperature single-use cooling fluid cartridges are filled with a sufficient quantity of cryosurgical fluid to effect a desired endovascular cryosurgical treatment.
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Joye James
Williams Richard S.
Williams Ronald
Barrish Mark D.
CryoVascular Systems, Inc.
Gibson Roy D.
Townsend & Townsend & Crew LLP
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