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Helically wound radio-frequency emitting electrodes for creating lesions in body tissue

  • US 5,545,193 A
  • Filed: 08/22/1995
  • Issued: 08/13/1996
  • Est. Priority Date: 10/15/1993
  • Status: Expired due to Term
First Claim
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1. A device for ablating tissue within the body comprisingan element having an axis,a winding comprising spaced turns of energy emitting material wrapped about and along the axis of the element, anda sheath of a non-energy emitting material movable about the winding in one direction to expose more turns of the winding beyond the sheath and in another direction to cover more turns of the winding within the sheath,wherein the sheath carries an energy conveying contact touching at least one turn of the winding for conveying ablating energy from a source to the winding, the touching contact being advanced along successive turns of the winding during movement of the sheath to maintain the energy conveying contact.

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