Neural stimulation system providing auto adjustment of...

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

Reexamination Certificate

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C607S008000, C607S011000, C607S027000, C600S547000

Reexamination Certificate

active

07317948

ABSTRACT:
A neural stimulation system automatically corrects or adjusts the stimulus magnitude (stimulation energy) in order to maintain a comfortable and effective stimulation therapy. Because the changes in impedance associated with the electrode-tissue interface can indicate obstruction of current flow and positional lead displacement, lead impedance can indicate the quantity of electrical stimulation energy that should be delivered to the target neural tissue to provide corrective adjustment. Hence, a change in impedance or morphology of an impedance curve may be used in a feedback loop to indicate that the stimulation energy needs to be adjusted and the system can effectively auto correct the magnitude of stimulation energy to maintain a desired therapeutic effect.

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