Patent
Control apparatus for electrosurgical generator power output
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TLDR
In this article, a power control apparatus for an electrosurgical generator is used for controlling output power from the generator to the tissue or bodily fluids of a patient, and the control apparatus rapidly determines the range of impedance of the load on the generator and adjusts the output power accordingly.Abstract:
A power control apparatus for an electrosurgical generator (10) is used for controlling output power from the generator (10) to the tissue or bodily fluids of a patient (11). The control apparatus rapidly determines the range of impedance of the load on the electrosurgical generator (10) and adjusts the output power accordingly. Output current and output voltage from the electrosurgical generator (10) are monitored and sent to a microprocessor (18). The microprocessor (18) runs an algorithm that rapidly determines the impedance range of the load on the generator (10). The algorithm uses computational techniques, such as comparisons and bit shifting, that avoid long division and other time-consuming operations. The microprocessor (18) can then adjust a high voltage power supply (15) that effects the radio frequency amplifier stage. A method for controlling the power of the electrosurgical generator (10), including steps in the algorithm, is also disclosed.read more
Citations
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References
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Patent
Electrosurgical hemostatic device
TL;DR: An electrosurgical instrument is provided for cauterization and/or welding of tissue of varying impedances, thicknesses and vascularity especially in the performance of endoscopic procedures as discussed by the authors.
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TL;DR: In this article, a load responsive output sensing circuit for monitoring and controlling parameters of an electrosurgical unit (ESU) relative to load and the RF energy, has been proposed.
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Stuart D. Edwards,Roger A. Stern +1 more
TL;DR: In this article, the authors measured the current and voltage delivered to the associated electrode assembly and generated measured current and voltages signals to derive a measured tissue impedance signal, which was then used to control control functions based upon the measured impedance signal.
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Electrosurgical generator with improved circuitry for generating rf drive pulse trains
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