Patent Document ID: 10156543
Application ID: 13778630
Patent Flag: 1

Claim One:
1. A method for real-time detection of sensitivity loss for a working electrode of a sensor, the method comprising: periodically performing an electrochemical impedance spectroscopy (EIS) procedure to generate multiple sets of impedance-related data for said working electrode, wherein each of the multiple sets of impedance-related data includes data for at least one impedance-related parameter that is substantially glucose-independent; for each of said multiple sets of impedance-related data, calculating, by a microprocessor, respective values of 1 kHz imaginary impedance, 0.1 kHz real impedance, and relatively-higher frequency phase angle; monitoring, by said microprocessor, said respective values over time; based on said monitoring of the respective values, determining, by said microprocessor, when said respective values of 1 kHz imaginary impedance become more negative over time, that said working electrode is experiencing an oxygen deficiency-led loss of sensitivity; based on the determination that the working electrode is experiencing an oxygen deficiency-led loss of sensitivity, identifying, by the microprocessor, said working electrode as not behaving normally; and based on said identification of the working electrode as not behaving normally, alerting a user of the sensor that the sensor should be replaced.