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Coil electrode for thermal therapy

  • US 9,943,360 B2
  • Filed: 01/30/2012
  • Issued: 04/17/2018
  • Est. Priority Date: 01/30/2011
  • Status: Active Grant
First Claim
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1. An RFA (radio frequency ablation) apparatus, comprising:

  • an applicator, the applicator including a handle and a cannulating delivery needle mounted to the handle, the cannulating delivery needle including a tip spaced apart from the handle;

    a coil electrode, the coil electrode including a lead portion housed in the cannulating delivery needle, and a helical portion coupled to the lead portion, the helical portion formed of Nitinol and having a retracted state when housed within the cannulating delivery needle and a deployed state when moved out of the tip of the cannulating delivery needle, the helical portion having a central axis that is offset from the longitudinal axis of the cannulating delivery needle;

    a radially projecting first fin on the handle, the first fin being positioned to indicate a deployment path direction of the helical portion of the coil electrode, the first fin extends along half of the handle adjacent to the cannulating delivery needle and the first fin is caused to rotate about the handle to alert a user of the apparatus with tactile feedback when the helical portion encounters resistance when deployed; and

    a second fin being aligned with the central axis of the helical portion of the coil electrode when it is in its deployed position to indicate a center of an ablation zone during use.

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