Activity sensing for stimulator control
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United States of America Patent
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Apr 3, 2012
Grant Date -
Nov 20, 2008
app pub date -
Jul 28, 2008
filing date -
Apr 28, 2005
priority date (Note) -
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Abstract
The disclosure describes a system that measures the distance between one or more electrodes and tissue of a patient, and controls one or more parameters of the stimulation delivered to the tissue by the electrodes based on the measured distance. The system controls the measurement of the distance between the electrodes and the tissue as a function of activity of the patient. The system uses, for example, a piezoelectric transducer to sense activity of the patient, and may determine whether or how frequently to measure the distance between electrodes and tissue based on the sensed physical activity. A piezoelectric transducer may be used both to sense activity and to measure the distance between the electrodes and the tissue.
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