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Atrial ablation catheter and method for treating atrial fibrillation

  • US 20040015164A1
  • Filed: 07/19/2002
  • Published: 01/22/2004
  • Est. Priority Date: 07/19/2002
  • Status: Active Grant
First Claim
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1. A catheter for ablating tissue, the catheter comprising:

  • an elongated generally-tubular catheter body having proximal and distal ends and at least one lumen extending therethrough;

    a non-retractable ablation assembly attached to the distal end of the catheter body, the ablation assembly comprising;

    proximal and distal non-conductive tubings, each having a lumen extending therethrough, a generally tubular electrode mounted between the proximal and distal non-conductive tubings, the tubular electrode being formed of a material having shape-memory having at least one irrigation port through which fluid can pass from the inside to the outside of the electrode, and a non-conductive protective tubing extending generally parallel to and along the outside of the tubular electrode and having proximal and distal ends extending into the proximal and distal non-conductive tubings, respectively;

    at least one of an electrode lead wire and a temperature sensor wire extending through the non-conductive protective tubing and catheter body, the electrode lead wire having a distal end mounted to a ring electrode mounted on the distal non-conductive tubing, and the temperature sensor wire having a distal end mounted on or under the distal non-conductive tubing; and

    means for introducing fluid into the tubular electrode.

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