Electrosurgical generator adaptors
First Claim
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1. An adaptor for coupling between an electrosurgical generator and a hemostatic bipolar surgical instrument, the adaptor comprising:
- input terminals for coupling the adaptor to the electrosurgical generator;
output terminals for coupling the adaptor to the hemostatic bipolar instrument; and
a voltage limiting circuit coupled between the input terminals and the output terminals, the voltage limiting circuit including first and second output nodes, the voltage limiting circuit accepting an input voltage waveform from the electrosurgical generator and supplying an output voltage waveform to the hemostatic bipolar instrument proportional to the input voltage waveform when the input voltage is less than or equal to a predetermined voltage value, the voltage limiting circuit shunting current between the first and second output nodes to supply a clipped output voltage waveform to the hemostatic bipolar instrument when the input voltage waveform exceeds the predetermined voltage value.
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Abstract
Adaptors are provided for use with electrosurgical bipolar instruments and standard commercially available electrosurgical generators that reduce coagulum buildup and sticking on electrosurgical instruments. A first type of adaptor converts a high voltage, high crest factor output voltage waveform typical of conventional electrosurgical generators to a more desirable lower voltage, lower crest factor regime. A second type of adaptor limits the peak open-circuit voltage supplied by a conventional electrosurgical generator to an electrosurgical instrument.
322 Citations
10 Claims
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1. An adaptor for coupling between an electrosurgical generator and a hemostatic bipolar surgical instrument, the adaptor comprising:
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input terminals for coupling the adaptor to the electrosurgical generator; output terminals for coupling the adaptor to the hemostatic bipolar instrument; and a voltage limiting circuit coupled between the input terminals and the output terminals, the voltage limiting circuit including first and second output nodes, the voltage limiting circuit accepting an input voltage waveform from the electrosurgical generator and supplying an output voltage waveform to the hemostatic bipolar instrument proportional to the input voltage waveform when the input voltage is less than or equal to a predetermined voltage value, the voltage limiting circuit shunting current between the first and second output nodes to supply a clipped output voltage waveform to the hemostatic bipolar instrument when the input voltage waveform exceeds the predetermined voltage value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification