Facet joint pain relief method and apparatus

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

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607 43, A61N 118, A61N 134

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active

060145889

ABSTRACT:
An apparatus depolarizes the medial branch of the spinal nerve associated with a painful spinal facet joint so as to block pain impulses from reaching the spinal cord. The preferred apparatus includes a neurostimulator and two or more electrodes which carry electrical pulses to the target nerve or nerves. The impulses are intense enough to cause depolarization of a given medial branch and its articular branches, but not so large as to cause depolarization of the spinal cord itself. In the preferred embodiment the stimulator is physically small and battery operated, facilitating implantation underneath the skin. The stimulator includes a controller and appropriate electronics operative to generate electrical impulses tailored to an individual's need for appropriate pain relief in terms of pulse frequency, pulse width, and pulse amplitude. In an alternative embodiment, the stimulator further includes electrodes and electrical circuitry operative to monitor myoelectrical activity generated by the surrounding muscles and modulate the impulses generated by the stimulator to meet the demands of the individual's activity and/or prolong battery life.

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