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Resecting loop electrode and method for electrosurgical cutting and ablation

  • US 5,810,764 A
  • Filed: 07/18/1996
  • Issued: 09/22/1998
  • Est. Priority Date: 01/07/1992
  • Status: Expired due to Term
First Claim
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1. An electrosurgical resecting instrument comprising:

  • a shaft having a proximal end and a distal end;

    at least one active electrode having an elongate body with first and second ends disposed near the distal end of the shaft, the elongate body having an active portion with a surface geometry configured to promote substantially high electric field intensities between the active portion and the target site when a high frequency voltage is applied to the electrode, wherein the electric field intensities are sufficient to vaporize an electrically conducting fluid in contact with the active portion of the electrode; and

    a connector disposed near the proximal end of the shaft for electrically coupling the electrode to a high frequency voltage source.

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