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Electrosurgical medical system and method

  • US 8,475,446 B2
  • Filed: 07/09/2012
  • Issued: 07/02/2013
  • Est. Priority Date: 12/28/2000
  • Status: Expired due to Fees
First Claim
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1. A method for mitigating leakage in an RF electrosurgical generator, comprising:

  • delivering an RF signal from an RF electrosurgical generator to an electrosurgical electrode by way of a patient box, said RF electrosurgical generator including an RF amplifier;

    providing a balanced and symmetrical shielded transmission line coupling said RF electrosurgical generator disposed in a first housing to said patient box disposed in a second, different housing;

    providing a common mode choke in said patient box, said common mode choke including an output winding and a return winding, each of said output winding and said return winding wound about a ferrite core, said output winding and said return winding spaced apart and in parallel to maintain a desired impedance, said output winding comprising a wire carrying said RF signal as an output signal and said return winding comprising a duality of intertwined wires carrying a return signal from a return electrode, each of said output winding and said return winding having adjacent ribs spaced apart; and

    directing a common mode signal from said RF signal to said common mode choke thereby blocking said common mode signal.

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