Ablation system, methods, and controllers
First Claim
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1. A multi-electrode ablation system comprising:
- a power supply configured to be coupled to a plurality of electrodes; and
a controller coupled to the power supply, the controller configured to;
determine a thermal gain of each electrode of the plurality of electrodes, wherein the thermal gain of each electrode is determined based on temperature readings provided by one temperature sensor and wherein the thermal gain is a ratio of a change in measured temperature to an amount of applied power; and
for each electrode of the plurality of electrodes, set a power limit based at least in part on said electrode'"'"'s determined thermal gain, wherein the power limit establishes a maximum power that may be dissipated through said electrode, and wherein the power limit is proportional to a difference between the thermal gain and a threshold thermal gain.
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Abstract
Multi-electrode ablation systems, methods, and controllers are described. In one example, a multi-electrode ablation system includes a power supply configured to be coupled to a plurality of electrodes and a controller coupled to the power supply. The controller is configured to determine a thermal gain of each electrode of the plurality of electrodes. For each electrode of the plurality of electrodes, the controller sets a power limit based at least in part on said electrode'"'"'s determined thermal gain. The power limit establishes a maximum power that may be dissipated through said electrode.
120 Citations
20 Claims
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1. A multi-electrode ablation system comprising:
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a power supply configured to be coupled to a plurality of electrodes; and a controller coupled to the power supply, the controller configured to; determine a thermal gain of each electrode of the plurality of electrodes, wherein the thermal gain of each electrode is determined based on temperature readings provided by one temperature sensor and wherein the thermal gain is a ratio of a change in measured temperature to an amount of applied power; and for each electrode of the plurality of electrodes, set a power limit based at least in part on said electrode'"'"'s determined thermal gain, wherein the power limit establishes a maximum power that may be dissipated through said electrode, and wherein the power limit is proportional to a difference between the thermal gain and a threshold thermal gain. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a multi-electrode ablation system, the method comprising:
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determining a thermal gain of each electrode of a plurality of electrodes, wherein the thermal gain of each electrode is determined based on temperature readings provided by one temperature sensor and wherein the thermal gain is a ratio of a change in measured temperature to an amount of applied power; and for each electrode of the plurality of electrodes, setting a power limit based at least in part on said electrode'"'"'s determined thermal gain, wherein the power limit establishes a maximum power that may be dissipated through said electrode, and wherein the power limit is proportional to a difference between the thermal gain and a threshold thermal gain. - View Dependent Claims (9, 10)
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11. A multi-electrode ablation system comprising:
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a power supply configured to be coupled to a plurality of electrodes; and a controller coupled to the power supply, the controller configured to; determine a thermal gain of each electrode of the plurality of electrodes, wherein the thermal gain of each electrode is determined based on temperature readings provided by one temperature sensor and wherein the thermal gain is a ratio of a change in measured temperature to an amount of applied power; set a power limit for each electrode of the plurality of electrodes, wherein the power limit establishes a maximum power that may be dissipated through said electrode, and wherein the power limit is proportional to a difference between the thermal gain and a threshold thermal gain; and for each electrode of the plurality of electrodes, determine whether or not to reduce the power limit for said electrode based at least in part on the determined thermal gain of said electrode. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of operating a multi-electrode ablation system, the method comprising:
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determining a thermal gain of each electrode of the plurality of electrodes, wherein the thermal gain of each electrode is determined based on temperature readings provided by one temperature sensor and wherein the thermal gain is a ratio of a change in measured temperature to an amount of applied power; setting a power limit for each electrode of a plurality of electrodes, wherein the power limit establishes a maximum power that may be dissipated through said electrode, and wherein the power limit is proportional to a difference between the thermal gain and a threshold thermal gain; and for each electrode of the plurality of electrodes, determining whether or not to reduce the power limit for said electrode based at least in part on the determined thermal gain of said electrode. - View Dependent Claims (18, 19, 20)
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Specification