Ablation system and method of use
First Claim
1. A method of ablating tissue, comprising:
- applying ablation energy from an ablation device to a first tissue site;
monitoring submersion of at least a portion of the ablation device at the first tissue site; and
responsive to the degree of submersion of the ablation device at the first tissue site, changing the application of ablating energy to the first tissue site.
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Accused Products
Abstract
A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the impedance of the tissue to be ablated. Rather than attempting to detect a desired drop or a desired increase impedance, completeness of a lesion is detected in response to the measured impedance remaining at a stable level for a desired period of time, referred to as an impedance plateau. The mechanism for determining transmurality of lesions adjacent individual electrodes or pairs may be used to deactivate individual electrodes or electrode pairs, when the lesions in tissue adjacent these individual electrodes or electrode pairs are complete, to create an essentially uniform lesion along the line of electrodes or electrode pairs, regardless of differences in tissue thickness adjacent the individual electrodes or electrode pairs. Complete or partial submersion in a fluid of the ablating portion of the ablation device may be detected prior to, during or following an ablation procedure.
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Citations
36 Claims
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1. A method of ablating tissue, comprising:
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applying ablation energy from an ablation device to a first tissue site;
monitoring submersion of at least a portion of the ablation device at the first tissue site; and
responsive to the degree of submersion of the ablation device at the first tissue site, changing the application of ablating energy to the first tissue site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of ablation, comprising:
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applying ablation energy from an ablation device to a tissue site;
monitoring submersion of at least a portion of the ablation device; and
responsive to the amount of submersion of the ablation device, modifying the application of ablating energy to the tissue site. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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- 28. An ablation device comprising at least one submersion sensor for monitoring submersion of at least a portion of the ablation device in a fluid.
Specification