SYSTEM AND METHOD FOR MAPPING ARBITRARY ELECTRIC FIELDS TO PRE-EXISTING LEAD ELECTRODES
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Abstract
A system for a neurostimulator coupled to electrodes, and a method of providing therapy to a patient using the electrodes implanted within the patient. A target multipole relative to the electrodes is defined. The target multipole is emulated by defining an initial electrical current distribution for the electrodes, such that a first set of active electrodes respectively has electrical current values of a first polarity. Each of the electrical current values of the first polarity is compared to a first threshold value, and at least one of the electrodes in the first active electrode set is zeroed-out based on the comparison. The electrical current value of each of the zeroed-out electrode(s) is redistributed to remaining ones of the electrodes to define a new electrical current distribution for the electrodes. Electrical current is conveyed to the electrodes in accordance with the new electrical current distribution, thereby providing the therapy.
5 Citations
21 Claims
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1. (canceled)
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2. A neurostimulation system, comprising:
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an electrical neurostimulator; a plurality of electrodes coupled to the electrical neurostimulator; and external control device configured to; define an initial electrical current distribution for the plurality of electrodes to emulate a target multipole such that each electrode in the plurality of electrodes has its own fractionalized electrical current value that is a portion of a total current value; identify a subset of the plurality of electrodes to be used for a new electrical current distribution, wherein the plurality of electrodes includes an omitted electrode that is not within the subset; modify the initial electrical current distribution for the plurality of electrodes into a new electrical current distribution for the subset, including redistribute an electrical current value of the omitted electrode to the electrodes within the subset; and instruct the electrical neurostimulator to convey electrical current to the plurality of electrodes in accordance with the new electrical current distribution. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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defining an initial electrical current distribution for the plurality of electrodes to emulate a target multipole such that each electrode in the plurality of electrodes has its own fractionalized electrical current value that is a portion of a total current value; identifying a subset of the plurality of electrodes to be used for a new electrical current distribution, wherein the plurality of electrodes includes an omitted electrode that is not within the subset; modifying the initial electrical current distribution for the plurality of electrodes into a new electrical current distribution for the subset, including redistributing an electrical current value of the omitted electrode to the electrodes within the subset; and instructing the electrical neurostimulator to convey electrical current to the plurality of electrodes in accordance with the new electrical current distribution. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification