System and method for mapping arbitrary electric fields to pre-existing lead electrodes
First Claim
1. A neurostimulation system for use with an electrical neurostimulator coupled to a plurality of electrodes, the system comprising:
- an external control device configured to;
define an initial electrical current distribution for the plurality of electrodes to emulate a target field 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, based on the initial electrical current distribution, 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 one or more electrodes within the subset; and
generate instructions for the electrical neurostimulator to convey electrical current to the plurality of electrodes in accordance with the new electrical current distribution,wherein to identify the subset of the plurality of electrodes, the external control device is configured to identify a group of at least one electrode that has a lower current contribution to the total current value than the remainder of the plurality of electrodes, and wherein to identify the group, the external control device is configured to compare fractionalized electrical current values to a threshold value.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. A neurostimulation system for use with an electrical neurostimulator coupled to a plurality of electrodes, the system comprising:
-
an external control device configured to; define an initial electrical current distribution for the plurality of electrodes to emulate a target field 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, based on the initial electrical current distribution, 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 one or more electrodes within the subset; and generate instructions for the electrical neurostimulator to convey electrical current to the plurality of electrodes in accordance with the new electrical current distribution, wherein to identify the subset of the plurality of electrodes, the external control device is configured to identify a group of at least one electrode that has a lower current contribution to the total current value than the remainder of the plurality of electrodes, and wherein to identify the group, the external control device is configured to compare fractionalized electrical current values to a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method, comprising:
-
defining an initial electrical current distribution for the plurality of electrodes to emulate a target field 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, based on the initial electrical current distribution, 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 one or more electrodes within the subset; and generating instructions for the electrical neurostimulator to convey electrical current in accordance with the new electrical current distribution, wherein identifying the subset of the plurality of electrodes includes identifying a group of at least one electrode that has a lower current contribution to the total current value than the remainder of the plurality of electrodes, and wherein identifying the group of at least one electrode includes comparing fractionalized electrical current values to a threshold value. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A non-transitory machine-readable medium including instructions, which when executed by a machine, cause the machine to instruct a neuromodulation device to:
-
define an initial electrical current distribution for the plurality of electrodes to emulate a target field 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, based on the initial electrical current distribution, 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 one or more electrodes within the subset; and generate instructions for the electrical neurostimulator to convey electrical current in accordance with the new electrical current distribution, wherein identify the subset of the plurality of electrodes includes identify a group of at least one electrode that has a lower current contribution to the total current value than the remainder of the plurality of electrodes, and wherein identify the group of at least one electrode includes compare fractionalized electrical current values to a threshold value. - View Dependent Claims (17, 18, 19, 20)
-
Specification