06409722 is referenced by 442 patents.

The present invention provides an apparatus and a method for producing a virtual electrode within or upon a tissue to be treated with radio frequency alternating electric current. An apparatus in accordance with the present invention includes a supply of a conductive or electrolytic fluid to be provided to the patient, an alternative current generator, and a processor for creating, maintaining and controlling the ablation process by the interstitial or surficial delivery of the fluid to a tissue and the delivery of electric power to the tissue via the virtual electrode. The method in accordance with the invention includes the steps of delivering a conductive fluid to a predetermined tissue ablation site for a predetermined time period, applying a predetermined power level of radio frequency current to the tissue, monitoring at least one of several parameters and adjusting either the applied power and/or the fluid flow in response to the measured parameters.

Title
Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue
Application Number
9/347635
Publication Number
6409722 (B1)
Application Date
July 6, 1999
Publication Date
June 25, 2002
Inventor
Steven M Goetz
Fridley
MN, US
Mark A Christopherson
Shoreview
MN, US
Michael F Hoey
Shoreview
MN, US
Agent
Dicke Billig & Czaja P A
US
Assignee
Medtronic
MN, US
IPC
A61B 18/18
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