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Catheter with cryogenic and heating ablation

  • US 7,097,641 B1
  • Filed: 12/09/1999
  • Issued: 08/29/2006
  • Est. Priority Date: 12/09/1999
  • Status: Expired due to Fees
First Claim
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1. A catheter for the cryotreatment of tissue, said catheter comprising:

  • a catheter body;

    a controller operative for selectively regulating cryogenic cooling energy with heat ablation energy; and

    , a treatment tip positioned at the distal end of said catheter body, said treatment tip having;

    a cooling segment operable at a temperature sufficient to freeze tissue, said cooling segment having a thermally conductive wall for contacting and thermally treating tissue in contact with said thermally conductive wall; and

    an electrically-driven ablation assembly, said electrically-driven ablation assembly operable to apply heating ablation energy to said tissue, wherein said cooling segment and said electrically-driven heating ablation assembly operable to apply heating ablation energy to said tissue, wherein said cooling segment and said electrically-driven heating ablation assembly each effect tissue ablation;

    wherein said electrically driven ablation assembly includes an electrode assembly for applying one of radio frequency and microwave energy; and

    , a microwave driver tuned for propagation through near tissue and preferential absorption beyond said near tissue to effect ablation at a depth within said tissue.

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