Power apparatus, control and inverters for electrosurgery
AssigneeThe Board of Trustees of the University of Illinois
InventorsSudip Mazumder, Congbo Bao
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Abstract
The disclosure provides an example electrosurgical system and methods for use thereof. The electrosurgical system includes a high-frequency inverter (“HFI”) having a full bridge and a control system electrically coupled to the HFI. The control system controls output parameters including one or more of an output power Pout(t) and an output voltage or current by varying power reference Pref(t) or switch states of the HFI. The control system causes a power adaptation ΔP(t) to a preset power set Pset based on receiving at least one of impedance feedback and thermal feedback according to the following relationship: Pref(t)=Pset+ΔP(t).
Claims20
An electrosurgical system, comprising:
- a high-frequency inverter (“HFI”) having a full bridge;
- a control system electrically coupled to the HFI that controls output parameters including one or more of an output power Pout(t) and an output voltage or current by varying power reference Pref(t) or switch states of the HFI, wherein the control system causes a power adaptation ΔP(t) to a preset power Pset based on receiving at least one of impedance feedback and thermal feedback according to the following relationship:
- Pref(t)=Pset+ΔP(t).
A non-transitory computer-readable medium having stored thereon program instructions that upon execution by a processor, cause performance of a set of steps comprising:
- the control system receiving at least one signal with an indication of thermal feedback and/or impedance feedback;
- the control system determining a power adaptation ΔP(t) based on the thermal feedback and/or impedance feedback;
- and
- the control system combining a preset power Pset for the HFI with the determined power adaptation ΔP(t) to obtain the output power reference Pref(t) for the HFI.
Dependencies are inferred from the claim text.