Temperature controlled short duration ablation
First Claim
1. A method, comprising:
- performing an ablation procedure on biological tissue using radiofrequency (RF) power by delivering a first level of RF power to the tissue;
measuring at respective times a temperature of the tissue; and
when the temperature exceeds a preset maximum allowable temperature, reducing the RF power by delivering a second level of RF power to the tissue,wherein the first level of RF power is in a range of 70 W-100 W, and the second level of RF power is in a range of 20 W-60 W.
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Abstract
A method, including selecting a first maximum radiofrequency (RF) power to be delivered by an electrode within a range of 70 W-100 W, and selecting a second maximum RF power to be delivered by the electrode within a range of 20 W-60 W. The method also includes selecting an allowable force on the electrode within a range of 5 g-50 g, selecting a maximum allowable temperature, of tissue to be ablated, within a range of 55° C.-65° C., and selecting an irrigation rate for providing irrigation fluid to the electrode within a range of 8-45 ml/min. The method further includes performing an ablation of tissue using the selected values by initially using the first power, switching to the second power after a predefined time between 3 s and 6 s, and terminating the ablation after a total time for the ablation between 10 s and 20 s.
27 Citations
20 Claims
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1. A method, comprising:
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performing an ablation procedure on biological tissue using radiofrequency (RF) power by delivering a first level of RF power to the tissue; measuring at respective times a temperature of the tissue; and when the temperature exceeds a preset maximum allowable temperature, reducing the RF power by delivering a second level of RF power to the tissue, wherein the first level of RF power is in a range of 70 W-100 W, and the second level of RF power is in a range of 20 W-60 W. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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performing an ablation procedure on biological tissue using radiofrequency (RF) power; measuring at respective times a temperature of the tissue; and when the temperature exceeds a preset maximum allowable temperature, reducing a level of the RF power supplied to the tissue according to the following equations;
Δ
P=min(Δ
P(T),Δ
P(p)),where Δ
P(T)=(a(Tt-1−
Tt)/T)+(b(Tt-1−
Tt)/T), andwhere Δ
P(p)=(P−
Pt)/P. - View Dependent Claims (8)
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9. Apparatus, comprising:
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a power control module configured to perform an ablation procedure on biological tissue using radiofrequency (RF) power; and a processor configured to; deliver to the tissue a first level of RF power supplied by the power control module; measure at respective times a temperature of the tissue; and when the temperature exceeds a preset maximum allowable temperature, reduce the RF power supplied to the tissue by the power control module to the tissue by delivering a second level of RF power, wherein the first level of RF power is in a range of 70 W-100 W, and the second level of RF power is in a range of 20 W-60 W. - View Dependent Claims (10, 11, 12, 13, 14)
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15. Apparatus, comprising:
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a power control module configured to perform an ablation procedure on biological tissue using radiofrequency (RF) power; and a processor configured to; deliver to the tissue a first level of RF power supplied by the power control module; measure at respective times a temperature of the tissue; and when the temperature exceeds a preset maximum allowable temperature, reduce the RF power supplied to the tissue by the power control module to the tissue according to the following equation;
Δ
P=min(Δ
P(T),Δ
P(p)),where Δ
P(T)=(a(Tt-1−
Tt)/T)+(b(Tt-1−
Tt)/T), andwhere Δ
P(p)=(P−
Pt)/P. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification