Electrosurgical method and apparatus

Details Electrosurgical method and apparatus Electrosurgical method and apparatus

2008-05-27

2008-05-27

Peffley, Michael (Department: 3739)

Surgery

Instruments

Electrical application

C606S032000, C606S041000, C606S042000

Reexamination Certificate

active

07377918

ABSTRACT:
Apparatus for forming a lesion in body tissue includes a probe having an active region with an electrode for contacting tissue to be treated, and an inactive region including an insulative sleeve around a portion of the electrode. The temperature of the inactive region is monitored using a temperature sensor. A controller supplies radio frequency energy to the electrode and samples signals from the temperature sensor. By performing a calculation using the sampled signals and a predetermined inactive region threshold temperature, and by adjusting the supplied radio frequency power, the inactive region of the probe can be maintained at or below an inactive region maximum temperature while the controller continues to supply radio frequency energy to the electrode. The probe has a second temperature sensor, mounted at a distal end of the electrode, the controller being configured to reduce the supplied radio frequency power when the electrode temperature reaches a predetermined maximum electrode temperature.

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