ELECTROSURGICAL MEDICAL SYSTEM AND METHOD
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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
52 Claims
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1. -43. (canceled)
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44. A system for controlling an electrosurgical electrode of a medical device, comprising:
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a hand-held electrosurgical electrode having 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; and 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. - View Dependent Claims (48, 49, 50, 51)
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45. -47. (canceled)
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52. A system for controlling an electrosurgical electrode of a medical device, comprising:
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an electrosurgical electrode having 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 being configured to generate an RF signal, and wherein any asymmetry in the RF signal is designated as a common mode signal; and a patient box communicatively interposed between the RF generator and the electrosurgical electrode, the RF generator being coupled to the patient box via a balanced and symmetrical shielded transmission line, the patient box having a common mode choke configured to block the common mode signal.
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Specification