Methods and devices for creating electrical block at specific sites in cardiac tissue with targeted tissue ablation
First Claim
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1. An ablation device comprising:
- a body having a proximal and distal end;
a first set and a second set of electrically conductive tissue penetrating elements disposed at said distal end of said body;
said first set of electrically conductive tissue penetrating elements having a positive polarity and said second set of electrically conductive tissue penetrating elements having a negative polarity;
said first set positioned opposite said second set; and
, an ablative energy source connected to second set of electrically conductive tissue penetrating elements.
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Abstract
In one embodiment, the present invention provides a bipolar ablation device with multiple needle electrodes that penetrate a desired target tissue. These electrodes may be arranged in a variety of therapeutically effective arrangements, such as a comb-like shape, a multi-needle wheel, or an expanding bow design. By contacting and preferably penetrating the cardiac tissue with bipolar electrodes, a user can more precisely create ablation-induced scarring and thus electrical block at desired target locations without causing unwanted damage and related complications.
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Citations
35 Claims
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1. An ablation device comprising:
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a body having a proximal and distal end;
a first set and a second set of electrically conductive tissue penetrating elements disposed at said distal end of said body;
said first set of electrically conductive tissue penetrating elements having a positive polarity and said second set of electrically conductive tissue penetrating elements having a negative polarity;
said first set positioned opposite said second set; and
,an ablative energy source connected to second set of electrically conductive tissue penetrating elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of ablating tissue comprising:
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identifying tissue of a desired ablation site;
introducing a first set of ablation elements of a predetermined polarity to said ablation site;
introducing a second set of ablation elements of an opposite polarity to a position spaced from said first set of ablation elements at said ablation site; and
,energizing said ablation elements so as to ablate said tissue in the region between said first and second sets of ablation elements. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A device for creating electrical block in heart tissue comprising:
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a device body;
a plurality of pliable bow electrodes extending along and around said device body;
an electrically conductive tissue penetrating element disposed on each of said bow electrodes;
said pliable bow electrodes being movable along an axis of said device body between an expanded and a retracted position;
said expanded position positioning each of said tissue penetrating elements circumferentially outwardly relative to said device body;
said retracted position positioning each of said tissue penetrating elements generally along a surface of said body; and
an electrical energy source connected to said bow electrodes. - View Dependent Claims (19, 20, 21)
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22. An ablation device comprising:
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a first tissue penetrating element and a second tissue penetrating element;
an ablation electrode disposed on each of said first and second tissue penetrating elements;
a ring electrode disposed on each of said first and second tissue penetrating elements;
an impedence measuring mechanism for measuring impedance between said ring electrode and said ablation electrode; and
,an ablative energy source connected to ablation electrode. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A method of ablating tissue comprising:
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providing at least one tissue penetrating element having an ablation electrode and a ring electrode;
introducing said tissue penetrating element into a tissue region;
measuring impedance between said ablation electrode and said ring electrode;
determining the nature of said tissue region according to said impedance measurement;
ablating said tissue region when said impedance measurement corresponds to said desired nature of said tissue region. - View Dependent Claims (29, 30, 32, 33, 34, 35)
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Specification