Method for electrosurgical cutting and ablation

Details Method for electrosurgical cutting and ablation Method for electrosurgical cutting and ablation

1998-10-23

2000-05-23

Cohen, Lee

Surgery

Instruments

Electrical application

606 41, 606 46, 604114, 607 99, 607105, 607113, A61B 1812, A61B 1814

Patent

active

060661348

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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