Electrosurgical Apparatus With High Speed Energy Recovery
First Claim
1. A generator for providing treatment energy to tissue, comprising:
- a power supply having an output filter and a discharge circuit, the output filter configured to store and output direct current energy;
an output stage coupled to the power supply and configured to convert the direct current energy into treatment energy for use in treating tissue; and
a controller for adjusting at least one of the power supply and the output stage to control the amount of treatment energy outputted by the output stage, wherein the discharge circuit is configured to provide time rate control of the discharge of the direct current energy stored in the output filter based on a comparison between the direct current energy stored in the output filter and a feedback signal.
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Accused Products
Abstract
A circuit for controlling the discharging of stored energy in an electrosurgical generator includes a pulse modulator which controls an output of a power supply. At least one comparator is configured to provide an error signal to the pulse modulator based on a comparison between an output signal generated by the power supply and a feedback signal generated in response to the application of energy to tissue. A discharge circuit is configured to control the discharge of the output of the power supply to an inductive load disposed in parallel with the output of the power supply based on the comparison between the output signal and the feedback signal. The discharge circuit provides a rapid response and time rate control of the delivered electrosurgical energy by controlling the power supply and delivered RF energy in real time, based on a feedback signal generated in response to the application of energy to tissue.
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Citations
19 Claims
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1. A generator for providing treatment energy to tissue, comprising:
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a power supply having an output filter and a discharge circuit, the output filter configured to store and output direct current energy; an output stage coupled to the power supply and configured to convert the direct current energy into treatment energy for use in treating tissue; and a controller for adjusting at least one of the power supply and the output stage to control the amount of treatment energy outputted by the output stage, wherein the discharge circuit is configured to provide time rate control of the discharge of the direct current energy stored in the output filter based on a comparison between the direct current energy stored in the output filter and a feedback signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A generator for providing treatment energy to tissue, comprising:
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a power supply having an output filter and a discharge circuit, the output filter configured to store and output direct current energy; an output stage coupled to the power supply and configured to convert the direct current energy into treatment energy for use in treating tissue; at least one sensor configured to sense at least one tissue property based on the application of treatment energy to tissue; and a controller in operable communication with the at least one sensor and configured to adjust at least one of the power supply and the output stage to control the amount of treatment energy output by the output stage, wherein the discharge circuit is configured to provide time rate control of the discharge of the direct current energy stored in the output filter based on a comparison between the direct current energy stored in the output filter and a feedback signal generated by the sensor based on the at least one sensed tissue property.
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12. A method for providing treatment energy from a generator to tissue, comprising the steps of:
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storing direct current energy; converting the stored direct current energy into treatment energy; controlling an output of treatment energy for treating tissue; sensing at least one sensed tissue property based on application of treatment energy to tissue; and controlling a time rate of change of a discharge of the stored direct current energy based on a comparison between the stored direct current energy and a feedback signal based on the sensed tissue property. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification