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Systems and methods for detecting faults and/or adjusting electrical therapy based on impedance changes

  • US 9,814,884 B2
  • Filed: 11/05/2012
  • Issued: 11/14/2017
  • Est. Priority Date: 11/04/2011
  • Status: Active Grant
First Claim
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1. A method for controlling a patient therapy device, comprising:

  • applying a therapeutic, paresthesia-less electrical signal to a target neural population in a patient'"'"'s spinal cord region via a patient modulation system that includes a signal delivery device in electrical communication with the target neural population, wherein the electrical signal provides pain relief for a period of time that extends beyond a duration of the electrical signal;

    automatically monitoring, on a pre-set periodic basis, an impedance of an electrical circuit that includes the signal delivery device;

    detecting a change in the impedance of the electrical circuit that indicates a fault;

    automatically adjusting a compliance value in accordance with which the electrical signal is delivered; and

    in response to detecting the change in the impedance automatically correcting or compensating for the fault before the patient senses a change in therapy resulting from the change in the impedance indicating the fault.

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