System and method for terminating treatment in impedance feedback algorithm
First Claim
1. An electrosurgical system comprising:
- an electrosurgical generator adapted to supply electrosurgical energy to tissue, the electrosurgical generator including;
a microprocessor adapted to generate a target impedance trajectory having at least one slope, wherein the target impedance trajectory includes a plurality of target impedance values, the microprocessor also adapted to drive tissue impedance along the target impedance trajectory by adjusting the output level to substantially match tissue impedance to a corresponding target impedance value, the microprocessor further adapted to compare tissue impedance to a threshold impedance value and adjust output of the electrosurgical generator when the tissue impedance is equal to or greater than the threshold impedance; and
an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue.
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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. The electrosurgical generator includes a microprocessor adapted to generate a desired impedance trajectory having at least one slope. The target impedance trajectory includes one or more target impedance values. The microprocessor is also adapted to drive tissue impedance along the target impedance trajectory by adjusting the output level to substantially match tissue impedance to a corresponding target impedance value. The microprocessor is further adapted to compare tissue impedance to a threshold impedance value and adjust output of the electrosurgical generator when the tissue impedance is equal to or greater than the threshold impedance. 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
18 Claims
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1. An electrosurgical system comprising:
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an electrosurgical generator adapted to supply electrosurgical energy to tissue, the electrosurgical generator including;
a microprocessor adapted to generate a target impedance trajectory having at least one slope, wherein the target impedance trajectory includes a plurality of target impedance values, the microprocessor also adapted to drive tissue impedance along the target impedance trajectory by adjusting the output level to substantially match tissue impedance to a corresponding target impedance value, the microprocessor further adapted to compare tissue impedance to a threshold impedance value and adjust output of the electrosurgical generator when the tissue impedance is equal to or greater than the threshold impedance; and
an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue. - View Dependent Claims (2, 3, 4, 5)
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6. 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;
generating a target impedance trajectory, wherein the target impedance trajectory includes a plurality of target impedance values;
driving tissue impedance along the target impedance trajectory by adjusting the output level to match tissue impedance to a corresponding target impedance value; and
comparing tissue impedance to a threshold impedance value and adjusting output of the electrosurgical generator when the tissue impedance is equal to or greater than the threshold impedance. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. An electrosurgical generator comprising:
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an RF output stage adapted to supply electrosurgical energy to tissue; and
a microprocessor adapted to generate a target impedance trajectory having at least one slope, wherein the target impedance trajectory includes a plurality of target impedance values, the microprocessor also adapted to drive tissue impedance along the target impedance trajectory by adjusting the output level to substantially match tissue impedance to a corresponding target impedance value, the microprocessor further adapted to compare tissue impedance to a threshold impedance value and adjust output of the electrosurgical generator when the tissue impedance is equal to or greater than the threshold impedance. - View Dependent Claims (15, 16, 17, 18)
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Specification