Surgery – Instruments – Cyrogenic application
Reexamination Certificate
2007-03-19
2008-08-26
Cohen, Lee S (Department: 3739)
Surgery
Instruments
Cyrogenic application
C606S021000, C606S022000, C606S025000, C062S050600
Reexamination Certificate
active
07416548
ABSTRACT:
A cryosurgical system and method for supplying cryogen to a probe. The system including a container filled with cryogen and having bellows of a pump submerged within said cryogen. Conduits fluidly interconnect the bellows and a probe that is outside the container to permit the cryogen to be forced from the bellows to the probe upon activation of pump. A pressure relief valve is fluidly coupled to the conduits and positioned between the bellows and the probe. After initially forcing cryogen to the probe at a pressure that establishes a colligative-based sub-cooling of the liquid cryogen, the pressure relief valve is activated to lower the pressure of the cryogen to a running pressure.
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Baust John G.
Cheeks Roy
Cohen Lee S
Endocare, Inc.
Ginsberg Lawrence N.
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