06224592 is referenced by 449 patents and cites 180 patents.

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.

Title
Systems and methods for electrosurgical tissue treatment in conductive fluid
Application Number
9/98205
Publication Number
6224592 (B1)
Application Date
July 27, 1998
Publication Date
May 1, 2001
Inventor
Hira V Thapliyal
Los Altos
CA, US
Philip E Eggers
Dublin
OH, US
Agent
John T Raffle
US
Assignee
ArthroCare Corporation
CA, US
IPC
A61B 18/12
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