Surgery – Instruments – Cyrogenic application
Patent
1997-04-14
1998-12-08
Buiz, Michael Powell
Surgery
Instruments
Cyrogenic application
606 20, 606 21, A61B 1736
Patent
active
058462350
ABSTRACT:
A cryoprobe instrument for endoscopic use has been provided that permits the delivery of liquid or gaseous cryogens in the form of a spray. In an embodiment, the cryoprobe instrument includes an elongated, flexible tube having a fluid passage defined therethrough; a proximal connector portion provided at the proximal end of the tube for coupling the tube to a pressurized source of cryogenic refrigerant; and a nozzle tip mounted to the distal end of the tube. The nozzle tip has an outlet orifice constructed and arranged such that through the Joule-Thompson effect, cryogenic refrigerant exiting through the outlet orifice rapidly and substantially expands and cools.
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Baust John G.
Kalloo Anthony N.
Pasricha Pankaj Jay
Potorff Lawrence
Buiz Michael Powell
Cryomedical Sciences Inc.
Johns Hopkins University
Woo Julian W.
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