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Systems and method of adjusting the compliance voltage in a neuromodulation device

  • US 9,616,233 B2
  • Filed: 08/20/2014
  • Issued: 04/11/2017
  • Est. Priority Date: 08/29/2013
  • Status: Active Grant
First Claim
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1. A therapeutic neuromodulation system, comprising:

  • a plurality of electrical terminals configured for being respectively coupled to a plurality of electrodes implanted within tissue;

    analog output circuitry configured for delivering therapeutic electrical energy between the plurality of electrical terminals in accordance with a set of modulation parameters that includes a defined current value;

    a voltage regulator configured for supplying an adjustable compliance voltage to the analog output circuitry;

    monitoring circuitry configured for measuring an electrical parameter indicative of a change of impedance in the tissue; and

    control/processing circuitry configured for automatically performing a compliance voltage calibration process at a compliance voltage adjustment interval including;

    periodically computing an adjusted compliance voltage value as a function of a compliance voltage margin, including;

    periodically directing the monitoring circuitry to measure the electrical parameter value, determining voltage drops based on the measured electrical parameters;

    computing a function of at least two of the voltage drops indicative of a rate of impedance change; and

    adjusting the at least one of the compliance voltage adjustment interval and the compliance voltage margin based on the computed function; and

    directing the voltage regulator to adjust the compliance voltage to the adjusted compliance voltage value,wherein the control/processing circuitry is configured for automatically adjusting at least one of the compliance voltage adjustment interval and the compliance voltage margin during the voltage compliance calibration process.

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