Electrosurgical generator
First Claim
1. In an electrosurgical generator for performing a plurality of electrosurgical operations having a D.C. power source, output circuitry for connection to a patient and means controllable by an operating surgeon for selecting one of said electrosurgical operations, the improvement comprising:
- a plurality of switches;
means responsive to said selecting means for connecting said switches in a bridge configuration;
means responsive to said selecting means for connecting said bridge across said power source;
means responsive to said selecting means for connecting said output circuitry across said bridge; and
means responsive to said selecting means for generating timing signals to control said switches to selectively connect said output circuitry to said power source.
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Accused Products
Abstract
A solid-state electrosurgical generator is disclosed which provides three separate output circuits that may be operated from a single common power source. One of the output circuits produces an output electrical waveform which is optimized for cutting and coagulation with monopolar electrodes. Another circuit provides a waveform which is optimized for cutting and coagulation with bipolar electrodes. The other electrosurgical circuit produces an output electrical waveform which is optimized for fulguration. The output circuits produce the optimized waveforms by appropriately processing electrical power provided by a D.C. power source. In order to do this, the output circuits may be connected to the power source by means of four semiconductor switches may be arranged in either a bridge configuration for one output circuit or in a series arrangement for the other output circuit. The switches are, in turn, controlled by a timing circuit which provides different timing waveforms to the switches depending on their configuration.
163 Citations
15 Claims
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1. In an electrosurgical generator for performing a plurality of electrosurgical operations having a D.C. power source, output circuitry for connection to a patient and means controllable by an operating surgeon for selecting one of said electrosurgical operations, the improvement comprising:
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a plurality of switches; means responsive to said selecting means for connecting said switches in a bridge configuration; means responsive to said selecting means for connecting said bridge across said power source; means responsive to said selecting means for connecting said output circuitry across said bridge; and means responsive to said selecting means for generating timing signals to control said switches to selectively connect said output circuitry to said power source. - View Dependent Claims (2, 3, 4)
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5. In an electrosurgical generator for performing a plurality of electrosurgical operations having a D.C. power source, a first output circuit connectable to a patient for performing an electrosurgical fulguration operation, a second output circuit connectable to a patient for performing electrosurgical dessication or cutting operations, and means controllable by an operating surgeon for selecting one of said electrosurgical operations, the improvement comprising;
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a reconfigurable switching network; means connecting said switching network to said power source; first means responsive to said selecting means for configuring said switching network to connect said first output circuit directly across said power source; and second means responsive to said selecting means for configuring said switching network to connect said second output circuit directly across said power source. - View Dependent Claims (6, 7, 8, 9)
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10. An electrosurgical generator for performing a plurality of electrosurgical operations comprising:
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a D.C. power source, a first output transformer having a primary winding and a secondary winding connectable to a patient for performing an electrosurgical fulguration operation; a capacitor connected across said primary winding of said first output transformer; a second output transformer having a primary winding and a secondary winding connectable to a patient for performing electrosurgical dessication or cutting operations; control means operable by an operating surgeon for selecting one of said electrosurgical operations; a plurality of switches; first mode means responsive to said control means for connecting said switches in series with said primary winding of said first output transformer across said power source; second mode means responsive to said control means for connecting said switches in a bridge configuration across said power source and for connecting said primary winding of said second output transformer across said bridge. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification