System and method for DC tissue impedance sensing
First Claim
1. An electrosurgical system, comprising:
- a direct current power supply configured to supply direct current;
a radio frequency output stage electrically coupled to the direct current power supply, the radio frequency output stage includes at least one active output terminal and at least one return output terminal and is configured to transform direct current into a radio frequency waveform;
a direct current voltage sensor coupled to the direct current power supply and configured to measure direct current voltage;
a direct current current sensor coupled to the direct current power supply and configured to measure direct current;
a controller coupled to the direct current voltage and current sensors, the controller configured to determine at least one of voltage and current of the radio frequency waveform based on the measured voltage and current of the direct current;
a radio frequency voltage sensor coupled to the at least one active output terminal and the at least one return output terminal and configured to measure radio frequency voltage therebetween; and
a radio frequency current sensor coupled to the at least one active output terminal and configured to measure radio frequency current therethrough,wherein the controller is configured to compare at least one of calculated voltage and calculated current of the radio frequency waveform with at least one of measured voltage and measured current of the radio frequency waveform.
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Accused Products
Abstract
A system and method for transmitting electrosurgical energy from a generator to an electrosurgical instrument are provided. The electrosurgical system includes a generator adapted to generate electrosurgical energy for treating tissue. The generator includes one or more active output terminals which supply energy to the tissue. The active output terminals are operatively connected to one or more active leads. The generator also includes one or more return output terminals which returns energy from the tissue. The return output terminals are operatively connected to at least one return lead. The system also includes an electrosurgical instrument operatively connected to the one or more active leads and one or more return electrodes operatively connected to one or more return leads. The system further includes an electrosurgical cable including one or more active leads and one or more return leads. The one or more active leads and one or more return leads are wound in a double helix fashion such that the electrical field along the cable is mitigated along the length thereof.
253 Citations
12 Claims
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1. An electrosurgical system, comprising:
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a direct current power supply configured to supply direct current; a radio frequency output stage electrically coupled to the direct current power supply, the radio frequency output stage includes at least one active output terminal and at least one return output terminal and is configured to transform direct current into a radio frequency waveform; a direct current voltage sensor coupled to the direct current power supply and configured to measure direct current voltage; a direct current current sensor coupled to the direct current power supply and configured to measure direct current; a controller coupled to the direct current voltage and current sensors, the controller configured to determine at least one of voltage and current of the radio frequency waveform based on the measured voltage and current of the direct current; a radio frequency voltage sensor coupled to the at least one active output terminal and the at least one return output terminal and configured to measure radio frequency voltage therebetween; and a radio frequency current sensor coupled to the at least one active output terminal and configured to measure radio frequency current therethrough, wherein the controller is configured to compare at least one of calculated voltage and calculated current of the radio frequency waveform with at least one of measured voltage and measured current of the radio frequency waveform. - View Dependent Claims (2, 3, 4, 5)
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6. A method for delivering radio frequency energy to tissue, the method comprising:
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generating direct current at a direct current power supply; transforming direct current into a radio frequency waveform at a radio frequency output stage electrically coupled to the direct current power supply; measuring voltage and current of the direct current supplied to the radio frequency output stage; determining at least one of voltage and current of the radio frequency waveform based on the measured voltage and current of the direct current; measuring voltage and current of the radio frequency waveform; and comparing calculated voltage and current of the radio frequency waveform, based on the measured voltage and current of the direct current, with measured voltage and current of the radio frequency waveform. - View Dependent Claims (7, 8, 9)
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10. An electrosurgical system, comprising:
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an electrosurgical generator including; a direct current power supply configured to supply direct current; a direct current voltage sensor coupled to the direct current power supply and configured to measure direct current voltage; a direct current current sensor coupled to the direct current power supply and configured to measure direct current; a controller coupled to the direct current voltage and current sensors; and an electrosurgical instrument coupled to the electrosurgical generator, the electrosurgical instrument including; a radio frequency output stage electrically coupled to the direct current power supply, the radio frequency output stage includes at least one active output terminal and at least one return output terminal, the radio frequency output stage is configured to transform direct current into a radio frequency waveform, wherein the controller is configured to determine at least one of voltage and current of the radio frequency waveform based on the measured voltage and current of the direct current; a radio frequency voltage sensor coupled to the at least one active output terminal and the at least one return output terminal and configured to measure radio frequency voltage therebetween; and a radio frequency current sensor coupled to the at least one active output terminal and configured to measure radio frequency current therethrough, wherein the controller is configured compare at least one of calculated voltage and calculated current of the radio frequency waveform with at least one of measured voltage and measured current of the radio frequency waveform, respectively. - View Dependent Claims (11, 12)
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Specification