Loading patent…
AssigneeCovidien LP
InventorsROBERT H. WHAM, JAMES A. GILBERT, CRAIG A. KELLER, BRIAN L. ROBERTS
Estimating the term…
The systems and methods of the present disclosure detect arcing patterns or impedance changes and adjust the level of electrosurgical energy provided to tissue based on the detected arcing patterns or impedance changes. In embodiments, the drag force imposed on the electrode or blade of an electrosurgical instrument may be controlled by adjusting the level of electrosurgical energy based on the detected arcing patterns or impedance changes. The arcing patterns or impedance changes may be detected by sensing voltage and/or current waveforms of the electrosurgical energy and analyzing the sensed voltage and/or current waveforms. The current and/or voltage waveform analysis may involve calculating impedance based on the sensed voltage and current waveforms and calculating changes in impedance over time. The waveform analysis may involve detecting harmonic distortion using FFTs, DFTs, Goertzel filters, polyphase demodulation techniques, and/or bandpass filters. The waveform analysis may involve determining a normalized difference or the average phase difference between the voltage and current waveforms.
A method of controlling electrosurgical energy provided by an electrode of an electrosurgical instrument to tissue:
An electrosurgical generator for providing electrosurgical energy to an electrode of an electrosurgical instrument, the electrosurgical generator comprising:
An electrosurgical system comprising:
Dependencies are inferred from the claim text.