St. Jude Medical, Cardiology Division, Inc.

Joseph William Barnier

John Eric Hein

Joseph Allen Brotz

Raymond Vincent Froehlich

John B Blix

James C Baker

Sukanya Varadharajan

Kevin K Ennett

Michael Olsen

Catherine A Pipenhagen

Raymond Victor Froehlich

John C Hein

Michael L Olsen

Multi-electrode ablation systems, methods, and controllers are described. In one example, a method of beginning an ablation procedure using a multi-electrode ablation system is described. The method includes selectively coupling the output of a power supply to a first electrode of a plurality of electrodes to increase a temperature at the first electrode to a first temperature set-point and limit a rate of increase of the temperature at the first electrode to a predetermined first rate.

Ablation system, methods, and controllers

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.

In a multi-electrode ablation system, method, and controller, a power supply is configured to be coupled to a plurality of electrodes, and a controller is coupled to the power supply. The controller is configured to couple an output voltage of the power supply to the plurality of electrodes, and for each electrode of the plurality of electrodes, measure a temperature associated with the electrode, and determine a thermal gain of each electrode of the plurality of electrodes.

In a multi-electrode ablation system, method, and controller, the controller is configured to measure a first current through a common return path when a first voltage is applied by a power supply to a first electrode of a plurality of electrodes, measure a second current through the common return path when a second voltage is applied by the power supply to a second electrode of the plurality of electrodes, measure a third current through the common return path when a third voltage is applied by the power supply concurrently to the first electrode and the second electrode, and determine a common path impedance based at least in part on the first voltage and the first current, the second voltage and the second current, and the third voltage and the third current.

Multi-electrode ablation systems, methods, and controllers are described. In one example, a multi-electrode ablation system generally includes a power supply and a controller. The power supply is configured to be coupled to a plurality of electrodes for delivering power to the electrodes. The controller is operable to compare a measured temperature at each electrode to a desired temperature to thereby define a temperature difference for each electrode. The controller is operable to determine, based on the temperature difference, a desired power for each electrode, compare the desired power of one of the electrodes to an actual power delivered to the one of the electrodes to define a power difference, and adjust the actual power delivered by the power supply to the one of the electrodes based on the power difference.

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Menasha, WI, United States of America

Joseph William Barnier