Electrosurgical power control
First Claim
1. A method comprising:
- determining whether a probe is delivering power in an ablative mode or a non-ablative mode;
delivering power to the probe according to a first algorithm when in the ablative mode;
delivering power to the probe according to a second algorithm different from the first algorithm when in the non-ablative mode, the second algorithm comprising a pulsed profile including portions of low power and portions of high power, the portions of high power being of sufficient durations to initiate the ablative mode and the durations being less than 250 milliseconds.
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Accused Products
Abstract
A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.
205 Citations
12 Claims
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1. A method comprising:
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determining whether a probe is delivering power in an ablative mode or a non-ablative mode; delivering power to the probe according to a first algorithm when in the ablative mode; delivering power to the probe according to a second algorithm different from the first algorithm when in the non-ablative mode, the second algorithm comprising a pulsed profile including portions of low power and portions of high power, the portions of high power being of sufficient durations to initiate the ablative mode and the durations being less than 250 milliseconds. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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an electrosurgical probe configured to deliver power to tissue; and a control module configured to determine whether the probe is delivering power in an ablative mode or a non-ablative mode, deliver power to the probe according to a first algorithm when in the ablative mode, and deliver power to the probe according to a second algorithm different from the first algorithm when in the non-ablative mode, wherein the second algorithm comprises a pulsed profile including portions of low power and portions of high power, the portions of high power being of sufficient durations to initiate the ablative mode and the durations being less than 250 milliseconds. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification