Automatic anode and cathode fractional control and location to selectively avoid dorsal root stimulation
First Claim
1. A method of providing therapy to a patient using an array of electrodes arranged along a longitudinal axis of the spinal column of the patient, the method comprising:
- determining a longitudinal location of the electrode array relative to the spinal cord;
configuring an electrode in the array of electrodes as a cathode, and two electrodes in the array of electrodes longitudinally flanking and laterally offset from the cathode as anodes;
selecting a ratio of stimulation amplitude values for the two anodes based on the determined longitudinal location of the electrode array relative to the spinal cord; and
delivering electrical stimulation energy to the active ones of the electrodes, such that the electrical stimulation energy is distributed between the two anodes in accordance with the selected stimulation amplitude value ratio.
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Abstract
A therapeutic neurostimulation system configured for providing therapy to a patient. The neurostimulation system comprises a neurostimulation lead having an array of electrodes arranged along a longitudinal axis configured for being implanted along a spinal cord of a patient, a neurostimulation device configured for delivering electrical stimulation energy to active ones of the electrode array, and control/processing circuitry for instructing the neurostimulation device to configure an active electrode as a cathode, and two active electrodes longitudinally flanking and laterally offset from the cathode as anodes, selecting a ratio of stimulation amplitude values for the two anodes based on a known longitudinal location of the implanted neurostimulation lead relative to the spinal cord, and instructing the neurostimulation device to distribute the electrical stimulation energy between the two anodes in accordance with the selected stimulation amplitude value ratio.
69 Citations
20 Claims
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1. A method of providing therapy to a patient using an array of electrodes arranged along a longitudinal axis of the spinal column of the patient, the method comprising:
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determining a longitudinal location of the electrode array relative to the spinal cord; configuring an electrode in the array of electrodes as a cathode, and two electrodes in the array of electrodes longitudinally flanking and laterally offset from the cathode as anodes; selecting a ratio of stimulation amplitude values for the two anodes based on the determined longitudinal location of the electrode array relative to the spinal cord; and delivering electrical stimulation energy to the active ones of the electrodes, such that the electrical stimulation energy is distributed between the two anodes in accordance with the selected stimulation amplitude value ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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configuring an implanted electrode as a cathode, and two implanted electrodes longitudinally flanking and laterally offset from the cathode as anodes; selecting a ratio of stimulation amplitude values for the two anodes based on a longitudinal location of the implanted electrodes relative to the spinal cord; and delivering electrical stimulation energy to the active ones of the electrodes, such that the electrical stimulation energy is distributed between the two anodes in accordance with the selected stimulation amplitude value ratio. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification