Electrosurgical medical system and method
First Claim
1. A system for controlling an electrosurgical electrode of a medical device, comprising:
- a hand-held electrosurgical electrode having a cutting probe, the cutting probe having a free distal end;
a return electrode configured to be positioned remote from the electrosurgical electrode;
an RF generator coupled to the electrosurgical electrode and to the return electrode, the RF generator including an RF amplifier, the RF generator being configured to generate an RF signal at a first RF power level for tissue cutting and generate the RF signal at a second RF power level greater than the first RF power level to initiate tissue cutting, the first RF power level being associated with a cutting mode of the RF generator and the second RF power level being associated with a start mode of the RF generator;
a sensor to monitor an electrical characteristic associated with the electrosurgical electrode;
a controller coupled to the RF amplifier, the controller configured to maintain a desired RF power output and a desired RF duty cycle at the first RF power level by adjusting a DC input voltage applied to an output stage of the RF amplifier based on the monitored electrical characteristic associated with the electrosurgical electrode; and
a patient box coupled between the RF generator and the electrosurgical electrode, the patient box configured such that an output impedance of the RF amplifier matches a load impedance of the tissue to enable a transfer of maximum power.
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Accused Products
Abstract
A system for controlling an electrosurgical electrode of a medical device includes a hand-held electrosurgical electrode having cutting probe. A return electrode is positioned remote from the electrosurgical electrode. An RF generator is coupled to the electrosurgical electrode and to the return electrode, and includes an RF amplifier. The RF generator generates an RF signal at a first RF power level for tissue cutting and generates the RF signal at a second RF power level greater than the first RF power level to initiate tissue cutting. A sensor monitors an electrical characteristic associated with the electrosurgical electrode. A controller coupled to the RF amplifier maintains a desired RF power output and a desired RF duty cycle at the first RF power level by adjusting a DC input voltage applied to an output stage of the RF amplifier based on the monitored electrical characteristic associated with the electrosurgical electrode.
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Citations
4 Claims
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1. A system for controlling an electrosurgical electrode of a medical device, comprising:
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a hand-held electrosurgical electrode having a cutting probe, the cutting probe having a free distal end; a return electrode configured to be positioned remote from the electrosurgical electrode; an RF generator coupled to the electrosurgical electrode and to the return electrode, the RF generator including an RF amplifier, the RF generator being configured to generate an RF signal at a first RF power level for tissue cutting and generate the RF signal at a second RF power level greater than the first RF power level to initiate tissue cutting, the first RF power level being associated with a cutting mode of the RF generator and the second RF power level being associated with a start mode of the RF generator; a sensor to monitor an electrical characteristic associated with the electrosurgical electrode; a controller coupled to the RF amplifier, the controller configured to maintain a desired RF power output and a desired RF duty cycle at the first RF power level by adjusting a DC input voltage applied to an output stage of the RF amplifier based on the monitored electrical characteristic associated with the electrosurgical electrode; and a patient box coupled between the RF generator and the electrosurgical electrode, the patient box configured such that an output impedance of the RF amplifier matches a load impedance of the tissue to enable a transfer of maximum power. - View Dependent Claims (2, 3, 4)
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Specification