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Enhanced electrosurgical apparatus

  • US 5,217,457 A
  • Filed: 01/29/1992
  • Issued: 06/08/1993
  • Est. Priority Date: 03/15/1990
  • Status: Expired due to Term
First Claim
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1. An electrosurgical apparatus for cutting biological tissue, which comprises, in combination, a hand-operated electrosurgical pencil comprising an exposed electrode with a distal end defining a cutting tip, means for supplying high-frequency, electrical energy from a generator through said electrode to cut said tissue and means for returning said electrical energy from said tissue to said generator to complete an electrical circuit, a source of inert gas, a device attached to said electrosurgical pencil, which device comprises a nose piece having a central axis and a hollow portion extending longitudinally about said axis, which hollow portion accommodates said electrode, said nose piece containing conduit means defining at least one pathway for gas so that gas passing therethrough shrouds said exposed electrode at or near to the tip thereof, means for connecting said conduit means to said source of inert gas and passing filtered inert gas from said source at a predetermined pressure and flow rate through said at least one pathway.

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