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Electrosurgical working end for controlled energy delivery

  • US 7,125,409 B2
  • Filed: 12/21/2005
  • Issued: 10/24/2006
  • Est. Priority Date: 10/22/2001
  • Status: Expired due to Term
First Claim
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1. A method for controlled energy delivery to tissue, the method comprising:

  • providing an electrosurgical probe having a working end comprising an internal conductor, an insulative layer and a conducive element extending through the insulative layer with one end of the element in electrical contact with the internal conductor and the other end exposed on the probe surface;

    engaging tissue at a tissue site with the working end;

    delivering Rf energy to the tissue site through the conductive element; and

    modulating the delivery of Rf energy to the tissue site by thermally altering a dimension of the insulative layer to move the conductive element out of or into electrical contact with the internal conductor.

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