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ELECTROSURGICAL GENERATOR

  • US 3,699,967 A
  • Filed: 04/30/1971
  • Issued: 10/24/1972
  • Est. Priority Date: 04/30/1971
  • Status: Expired due to Term
First Claim
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1. An electrosurgical generator suitable for generating cutting and coagulation electrosurgical currents comprising:

  • a power stage means including a resonant circuit for selectively generating a cutting current at a voltage and a frequency suitable for performing a cutting electrosurgical operation and a coagulation current at a voltage and a frequency suitable for performing a coagulation electrosurgical operation, the voltage of said cutting current having a substantially constant peakto-peak value and the voltage of said coagulation current having a decaying envelope with a maximum peak-to-peak value greater than the peak-to-peak value of said cutting current, the frequency of said cutting current being different than the frequency of said coagulation current, said resonant circuit resonating at the frequency of said coagulation current but not at the frequency of said cutting current;

    a control circuit means connected to said power stage means for controlling the operation of said power stage means in a manner such that the cutting current and the coagulation current are selectively generated; and

    , an output circuit means connected to said power stage means for applying the cutting current and the coagulation current selectively generated by said power stage means to instruments suitable for performing cutting and coagulation electrosurgical operations.

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