Patent ID: 8644931
Filing Date: 2014-02-04
Classification: A61N

Abstract:
1. A method comprising: obtaining a plurality of measured impedance values for an electrical path that are measured over multiple periods of time, wherein the electrical path comprises a plurality of electrodes for at least one of stimulation or sensing; obtaining a central tendency of the plurality of measured impedance values for the electrical path; determining an impedance value for the electrical path based on the central tendency; determining an impedance variability value based on at least a difference between one of the plurality of measured impedance values and the determined impedance value, wherein the one of the plurality of measured impedance values comprises either a maximum or a minimum impedance value measured during one of the multiple periods of time, and wherein the impedance variability value indicates an expected level of variability for impedance measurements for the electrical path; determining an impedance threshold value based on the determined impedance value and the impedance variability value; comparing a newly measured impedance value for the electrical path to the impedance threshold value; and indicating a possible condition of the electrical path based on the comparison.