System and method for controlling tissue heating rate prior to cellular vaporization
First Claim
1. An electrosurgical system comprising:
- an electrosurgical generator adapted to supply electrosurgical energy to tissue and to transmit an interrogatory signal to obtain initial tissue impedance and to derive a starting impedance value, the electrosurgical generator including;
a microprocessor adapted to generate a desired impedance trajectory as a function of at least one of the initial tissue impedance and the starting impedance value, wherein the desired impedance trajectory includes a plurality of target impedance values, the microprocessor being adapted to drive tissue impedance along the desired impedance trajectory by adjusting the output level to substantially match tissue impedance to a corresponding target impedance value; and
an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue.
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Accused Products
Abstract
A system and method for performing electrosurgical procedures are disclosed. The system includes an electrosurgical generator adapted to supply energy at an output level to tissue and to transmit an interrogatory signal to obtain initial tissue impedance to derive a starting impedance value. The electrosurgical generator includes a microprocessor adapted to generate a desired impedance trajectory as a function of either of the initial tissue impedance or the starting impedance value. The desired impedance trajectory includes a plurality of target impedance values. The electrosurgical generator is further adapted to drive tissue impedance along the desired impedance trajectory by adjusting the output level to match tissue impedance to a corresponding target impedance value. The system also includes an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue.
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Citations
20 Claims
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1. An electrosurgical system comprising:
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an electrosurgical generator adapted to supply electrosurgical energy to tissue and to transmit an interrogatory signal to obtain initial tissue impedance and to derive a starting impedance value, the electrosurgical generator including; a microprocessor adapted to generate a desired impedance trajectory as a function of at least one of the initial tissue impedance and the starting impedance value, wherein the desired impedance trajectory includes a plurality of target impedance values, the microprocessor being adapted to drive tissue impedance along the desired impedance trajectory by adjusting the output level to substantially match tissue impedance to a corresponding target impedance value; and an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for performing an electrosurgical procedure comprising the steps of:
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applying electrosurgical energy at an output level to tissue from an electrosurgical generator; transmitting an interrogatory signal to obtain initial tissue impedance to derive a starting impedance value; generating a desired impedance trajectory as a function of at least one of the initial tissue impedance and the starting impedance value, wherein the desired impedance trajectory includes a plurality of target impedance values; and driving tissue impedance along the desired impedance trajectory by adjusting the output level to match tissue impedance to a corresponding target impedance value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electrosurgical generator comprising sensor circuitry adapted to supply energy at an output level to tissue, the electrosurgical generator being adapted to transmit an interrogatory signal to obtain initial tissue impedance to derive a starting impedance value;
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a microprocessor adapted to generate a desired impedance trajectory as a function of at least one of the initial tissue impedance and the starting impedance value, wherein the desired impedance trajectory includes a plurality of target impedance values, the electrosurgical generator being adapted to drive tissue impedance along the desired impedance trajectory by adjusting the output level to match tissue impedance to a corresponding target impedance value. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification