Method and system for controlling output of RF medical generator
First Claim
1. A closed-loop control system for use with an electrosurgical generator that generates electrosurgical energy including at least one pulse, said closed loop control system comprising:
- a user interface which allows a user to select at least one pre-surgical parameter, said at least one pre-surgical parameter including at least one of a type of surgical instrument operatively connected to the generator, type of tissue and desired surgical effect;
a sensor module which continually senses at least one of electrical and physical properties proximate a surgical site and generating at least one signal relating thereto; and
a control module which continually receives said selected at least one pre-surgical parameter from said user interface and said at least one signal from said sensor module, and processing said at least one signal in accordance with the at least one pre-surgical parameter using at least one of a microprocessor, computer algorithm and a mapping, said control module generating at least one corresponding control signal relating to said at least one signal from said sensor module, and providing the at least one control signal to the electrosurgical generator for controlling the generator;
wherein said control module comprises a plurality of loop control modules with at least a first loop control module of said plurality of loop control modules providing a ratio between a real time parameter value and a desired parameter value;
said real time parameter value being from said at least one signal from said sensor module, and wherein said first loop control modules modulates another of said plurality of loop control modules based in part on said ratio to control the generator.
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Accused Products
Abstract
A closed-loop control system has a user interface for allowing a user to select at least one pre-surgical parameter. The system also has a sensor module for continually sensing at least one of electrical and physical properties proximate a surgical site and generating at least one signal and a control module for continually receiving the selected parameter from the user interface and the at least one signal from the sensor module. The system processes the signal in accordance with the parameter using at least one of a microprocessor, computer algorithm and a mapping. The control module generates a corresponding control signal relating to the signal from the sensor module, and provides the control signal to the generator. The control module has number of loop control modules with a first loop control module providing a ratio of a real time parameter value to a desired parameter value. The real time parameter value is from the signal from the sensor module. The first loop control module modulates another loop control module based in part on the ratio for controlling the generator
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Citations
25 Claims
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1. A closed-loop control system for use with an electrosurgical generator that generates electrosurgical energy including at least one pulse, said closed loop control system comprising:
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a user interface which allows a user to select at least one pre-surgical parameter, said at least one pre-surgical parameter including at least one of a type of surgical instrument operatively connected to the generator, type of tissue and desired surgical effect; a sensor module which continually senses at least one of electrical and physical properties proximate a surgical site and generating at least one signal relating thereto; and a control module which continually receives said selected at least one pre-surgical parameter from said user interface and said at least one signal from said sensor module, and processing said at least one signal in accordance with the at least one pre-surgical parameter using at least one of a microprocessor, computer algorithm and a mapping, said control module generating at least one corresponding control signal relating to said at least one signal from said sensor module, and providing the at least one control signal to the electrosurgical generator for controlling the generator; wherein said control module comprises a plurality of loop control modules with at least a first loop control module of said plurality of loop control modules providing a ratio between a real time parameter value and a desired parameter value; said real time parameter value being from said at least one signal from said sensor module, and wherein said first loop control modules modulates another of said plurality of loop control modules based in part on said ratio to control the generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for electrosurgically sealing tissue, comprising an electrosurgical generator comprising an RF energy source and a controller for controlling the operation of an electrosurgical generator, said electrosurgical generator having an output for coupling to a surgical instrument comprising electrodes for coupling RF energy generated by said electrosurgical generator to tissue to be sealed;
- said controller being operable for causing said electrosurgical generator to apply an initial pulse of RF energy to the tissue and for measuring a value of an electric characteristic of the tissue in response to the applied initial pulse, said controller being responsive to the measured electrical characteristic for determining an initial set of pulse parameters for a subsequent pulse and for then varying the pulse parameters of individual pulses of further subsequent RF energy pulses in accordance with a change in the electrical characteristic of the tissue;
wherein the controller is further operable for measuring an electrical and a physical characteristic of the tissue in response to the individual pulses and for then varying the pulse parameters of subsequent individual pulses in accordance with the electrical and physical characteristics of the tissue.
- said controller being operable for causing said electrosurgical generator to apply an initial pulse of RF energy to the tissue and for measuring a value of an electric characteristic of the tissue in response to the applied initial pulse, said controller being responsive to the measured electrical characteristic for determining an initial set of pulse parameters for a subsequent pulse and for then varying the pulse parameters of individual pulses of further subsequent RF energy pulses in accordance with a change in the electrical characteristic of the tissue;
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18. A control system to control an electrosurgical generator that generates electrosurgical energy including at least one pulse, the control system comprising:
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a sensor module which senses at least one property associated with a surgical site as one of a pre-surgical condition, concurrent surgical condition or a post-surgical condition and generating at least one signal relating thereto; and a control module executable on a processor which receives said at least one signal from said sensor module and processing said at least one signal using at least one of a computer algorithm and a mapping and generating at least one control signal in accordance with the processing, said control module providing the at least one control signal to the electrosurgical generator and being configured to control the generator, wherein said control module comprises a plurality of loop control modules with at least a first loop control module of said plurality of loop control modules providing a ratio between a real time parameter value and a desired parameter value; said real time parameter value being from said at least one signal from said sensor module, and wherein said first loop control modules modulates another of said plurality of loop control modules based in part on said ratio to control the generator. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification