Multiple tunable central cathodes on a paddle for increased medial-lateral and rostral-caudal flexibility via current steering
First Claim
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1. A neurostimulation system for providing therapy to a patient, the neurostimulation system comprising:
- a neurostimulation paddle lead configured to be operably positioned for use to stimulate spinal cord tissue of the patient, the neurostimulation paddle lead carrying a plurality of electrodes comprising at least four electrodes extending in a direction transverse to a longitudinal axis of the neurostimulation paddle lead, wherein the at least four electrodes include two inner electrodes and two outer electrodes flanking the two inner electrodes; and
a neurostimulator configured to convey electrical energy between the electrodes to create a medial-lateral electrical field having a locus on a first lateral side of the midline of the spinal cord tissue, and conveying electrical energy between the electrodes to create a medial-lateral electrical field having a locus on a second lateral side of the midline of the spinal cord tissue, the neurostimulator being further configured to repeatedly move the medial lateral electrical field back and forth between the first lateral side of the midline of the spinal cord tissue and the second lateral side of the midline of the spinal cord tissue to provide stimulation of dorsal column nerve fibers on the first and second lateral sides of the midline without stimulating dorsal column nerve fibers along the midline of the spinal cord tissue.
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Abstract
A neurostimulation paddle lead, method of neurostimulation, and neurostimulation system are provided. The neurostimulation paddle lead carries a plurality of electrodes comprising at least four columns of electrodes having a spacing between two inner electrode columns less than a spacing between the inner electrode columns and adjacent outer electrode columns. The inner electrode columns may also be longitudinally offset from the outer electrode columns. The methods and neurostimulation systems steer current between the electrodes to modify a medial-lateral electrical field created adjacent spinal cord tissue.
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Citations
20 Claims
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1. A neurostimulation system for providing therapy to a patient, the neurostimulation system comprising:
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a neurostimulation paddle lead configured to be operably positioned for use to stimulate spinal cord tissue of the patient, the neurostimulation paddle lead carrying a plurality of electrodes comprising at least four electrodes extending in a direction transverse to a longitudinal axis of the neurostimulation paddle lead, wherein the at least four electrodes include two inner electrodes and two outer electrodes flanking the two inner electrodes; and a neurostimulator configured to convey electrical energy between the electrodes to create a medial-lateral electrical field having a locus on a first lateral side of the midline of the spinal cord tissue, and conveying electrical energy between the electrodes to create a medial-lateral electrical field having a locus on a second lateral side of the midline of the spinal cord tissue, the neurostimulator being further configured to repeatedly move the medial lateral electrical field back and forth between the first lateral side of the midline of the spinal cord tissue and the second lateral side of the midline of the spinal cord tissue to provide stimulation of dorsal column nerve fibers on the first and second lateral sides of the midline without stimulating dorsal column nerve fibers along the midline of the spinal cord tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A neurostimulation system for providing therapy to a patient, the neurostimulation system comprising:
stimulation output circuitry operably connected to electrodes and a controller operably connected to the stimulation output circuitry to provide a medial-lateral electrical field having a locus on a first lateral side of a midline of spinal cord tissue, and to create a medial-lateral electrical field having a locus on a second lateral side of the midline of the spinal cord tissue, and repeatedly move the medial-lateral electrical field back and forth between the first lateral side of the midline of the spinal cord tissue and the second lateral side of the midline of the spinal cord tissue to provide stimulation of dorsal column nerve fibers on the first and second lateral sides of the midline without stimulating dorsal column nerve fibers along the midline of the spinal cord tissue. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A non-transitory machine-readable medium including instructions, which when executed by a machine, cause the machine to:
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(a) instruct a neurostimulator to convey electrical energy between at least four electrodes disposed adjacent spinal cord tissue of a patient in a medial-lateral electrode arrangement to create a medial-lateral electrical field, the least four electrodes including two inner electrodes and two outer electrodes flanking the two inner electrodes; (b) instruct the neurostimulator to discretely move a locus of the medial-lateral electrical field to one lateral side of the midline of the spinal cord tissue; (c) instruct the neurostimulator to discretely move the locus of the medial lateral electrical field to the other lateral side of the midline of the spinal cord tissue; and (d) instruct the neurostimulator to repeat steps (b) and (c) to repeatedly move the locus of the medial-lateral field back and forth between the one lateral side and the other lateral side of the midline of the spinal cord tissue, whereby dorsal column nerve fibers on both sides of the midline of the spinal cord tissue are stimulated without stimulating dorsal column nerve fibers along the midline of the spinal cord tissue. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification