Apparatus for R-F ablation
First Claim
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1. An ablation catheter system, comprising:
- an elongated catheter body having a proximal end and a distal end and comprising a first tube having an internal longitudinal lumen;
a hollow conductive electrode mounted to the distal end of said catheter body and having an internal lumen coupled to the internal lumen of said first tube;
fluid delivery means coupled to the internal lumen of said first tube for delivering a conductive fluid to said internal lumen of said first tube;
means for cooling said conductive fluid while in said internal lumen of said first tube; and
a source of R-F electrical energy, coupled to said electrode.
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Abstract
A method and apparatus for ablation of body tissue. A catheter provided with a hollow needle is employed both for mapping the location to be ablated by injection of an excitability reducing agent and for ablating tissue, employing RF energy in conjunction with an injected, conductive fluid.
473 Citations
11 Claims
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1. An ablation catheter system, comprising:
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an elongated catheter body having a proximal end and a distal end and comprising a first tube having an internal longitudinal lumen; a hollow conductive electrode mounted to the distal end of said catheter body and having an internal lumen coupled to the internal lumen of said first tube; fluid delivery means coupled to the internal lumen of said first tube for delivering a conductive fluid to said internal lumen of said first tube; means for cooling said conductive fluid while in said internal lumen of said first tube; and a source of R-F electrical energy, coupled to said electrode. - View Dependent Claims (2, 5, 6, 7, 8)
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3. An ablation catheter system, comprising:
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an elongated catheter body having a proximal end, a distal end and an internal longitudinal lumen; a hollow conductive electrode mounted to the distal end of said catheter body and having an internal lumen coupled to the internal lumen of said catheter body; fluid delivery means coupled to the internal lumen of said catheter body for delivering a conductive fluid to said internal lumen of said catheter body; means for heating said conductive fluid while in said internal lumen of said catheter body; and a source of R-F electrical energy, coupled to said electrode. - View Dependent Claims (4)
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9. An ablation catheter system, comprising:
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an elongated catheter body having a proximal end, a distal end and having an internal lumen, open to the distal end of said catheter body; a conductive electrode within said internal lumen; a first conductor, coupled to said electrode; a source of R-F energy, coupled to said first conductor; fluid delivery means coupled to said internal lumen of said catheter body for delivering a conductive fluid to said internal lumen; and a helical member extending from the distal end of said internal lumen. - View Dependent Claims (10, 11)
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Specification