Surgery – Instruments – Electrical application
Reexamination Certificate
2007-03-20
2007-03-20
Cohen, Lee S. (Department: 3739)
Surgery
Instruments
Electrical application
C606S032000
Reexamination Certificate
active
10392529
ABSTRACT:
A system and method for surface tissue ablation on the patient's outer skin, such as the epidermis or the underlying dermis. An electrosurgical probe (130) comprises a shaft (132) having an array of active electrodes (136) on its distal tip and a connector (134) at its proximal end for coupling the electrode array to a high frequency power supply. An electrically conducting liquid is directed along a fluid flow path (142) past a return electrode surface (138) to the target site to provide a current flow path between the target site and the return electrode. High frequency voltage is then applied to the active and return electrodes so that an electric current flows from the active electrode, through a layer of vapor formed at the tip of the electrode, and to the return electrode through the current flow path provided by the electrically conducting liquid. The high frequency voltage will preferably be sufficient to establish high electric field densities between the active electrode array and the epidermal tissue to thereby induce molecular breakdown or disintegration of several cell layers of the tissue.
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Eggers Philip E.
Thapliyal Hira V.
ArthroCare Corporation
Batt Richard R.
Cohen Lee S.
Raffle John
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