Radio-frequency generator for powering an ablation device

Details Radio-frequency generator for powering an ablation device Radio-frequency generator for powering an ablation device

2005-07-05

2008-08-05

Johnson, III, Henry M. (Department: 3739)

Surgery

Instruments

Electrical application

C606S041000

Reexamination Certificate

active

07407502

ABSTRACT:
An apparatus and method for use in performing ablation of organs and other tissues includes a radio frequency generator which provides a radio frequency signal to ablation electrodes. The power level of the radio frequency signal is determined based on the subject area of ablation. The radio frequency signal is coupled with the ablation electrodes through a transformation circuit. The transformation circuit includes a high impedance transformation circuit and a low impedance transformation circuit. The high or low impedance transformation circuit is selected based on the impedance of the ablation electrodes in contact with the subject tissue. Vacuum level, impedance level, resistance level, and time are measured during ablation. If these parameters exceed determinable limits the ablation procedure is terminated.

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