Surgery – Instruments – Electrical application
Reexamination Certificate
2007-05-15
2007-05-15
Cohen, Lee S. (Department: 3739)
Surgery
Instruments
Electrical application
C606S041000, C606S046000, C604S114000, C607S099000, C607S105000, C607S113000
Reexamination Certificate
active
10602240
ABSTRACT:
An electrosurgical probe (10) comprises a shaft (13) having an electrode array (58) at its distal end and a connector (19) at its proximal end for coupling the electrode array to a high frequency power supply (28). The shaft includes a return electrode (56) recessed from its distal end and enclosed within an insulating jacket (18). The return electrode defines an inner passage (83) electrically connected to both the return electrode and the electrode array for passage of an electrically conducting liquid (50). By applying high frequency voltage to the electrode array and the return electrode, the electrically conducting liquid generates a current flow path between the return electrode and the electrode array so that target tissue may be cut or ablated. The probe is particularly useful in dry environments, such as the mouth or abdominal cavity, because the electrically conducting liquid provides the necessary return current path between the active and return electrodes.
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Eggers Philip E.
Thapliyal Hira V.
ArthroCare Corporation
Batt Richard
Cohen Lee S.
Raffle John
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