Adjustable impedance electrosurgical electrodes

摘要

An electrosurgical system is disclosed. The electrosurgical system includes at least one electrosurgical electrode having a resistive element and a capacitive element configured in series. The electrosurgical system also including an electrosurgical generator configured to generate electrosurgical energy having a first frequency which generates a first impedance in the at least one electrode due to capacitive reactance of the capacitive element in series. The generator is further configured to adjust the first frequency to at least one other frequency to generate a different impedance in the at least one electrode due to capacitive reactance of the capacitive element in series, thereby adjusting the temperature of at least one electrosurgical electrode.

主权项

1. An electrosurgical system, comprising:
at least one electrosurgical electrode having a resistive element and a capacitive element configured in series; and an electrosurgical generator configured to generate electrosurgical energy having a low frequency that generates an increase in impedance in the at least two electrosurgical electrodes due to capacitive reactances of each the capacitive elements in series to generate an increase in temperature of a plurality of layers of tissue within a patient, the electrosurgical generator being further configured to adjust the low frequency to a high frequency to generate a decrease in the impedance in the at least two electrosurgical electrodes due to the capacitive reactances of each of the capacitive elements in series that generates a decrease in the temperature of the plurality of layers of tissue, wherein each of the capacitive elements functions as a variable resistor adjustable based on a frequency of the electrosurgical energy applied by the electrosurgical generator and allows approximately a same current to pass through each of the plurality of layers of tissue clasped between the at least two electrosurgical electrodes to provide uniform heating across the plurality of layers of tissue.