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Electrosurgical devices having sesquipolar electrode structures incorporated therein

  • US 3,987,795 A
  • Filed: 08/28/1974
  • Issued: 10/26/1976
  • Est. Priority Date: 08/28/1974
  • Status: Expired due to Term
First Claim
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1. An electrosurgical device adapted for connection to an electrical generator having active and return output terminals, said device being used to cut, coagulate, or otherwise treat human tissue or the like, said device comprising:

  • an insulative electrode support means;

    an active electrode comprising at least one conductive element responsive to said active output terminal and a return electrode comprising at least one conductive element responsive to said return output terminal, said electrodes being supported by said electrode support means, the entirety of said return electrode being asymmetrically disposed with respect to said one element of said active electrode, said active and return electrodes being rigidly supported a fixed distance apart by said electrode support means, both said electrodes being adapted for electrical connection to said tissue, the ratio of the return electrode area adapted to electrically connect to said tissue to the active electrode area adapted to electrically connect to said tissue being in the range of approximately 2 to 200; and

    means for connecting said active electrode to said active output terminal and said return electrode to said return output terminalwhereby said electrosurgical device can be used for cutting of said tissue due to said entirety of said return electrode being asymmetrically disposed with respect to said one active electrode element.

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