Medtronic Minimed, Inc.

Manjunath Sirigiri

Michael E Miller

Ning Yang

Bradley Chi Liang

Wayne A Morgan

Raghavendhar Gautham

Jenn-Hann Larry Wang

Yiwen Li

Catherine M Szyman

Paris Chen

Rajiv Shah

Robert C Mucic

Joseph Paul Brinson

Joseph P Brinson

Genival D De Barros

Carlos A Callirgos

A diagnostic Electrochemical Impedance Spectroscopy (EIS) procedure is applied to measure values of impedance-related parameters for one or more sensing electrodes. The parameters may include real impedance, imaginary impedance, impedance magnitude, and/or phase angle. The measured values of the impedance-related parameters are then used in performing sensor diagnostics, calculating a highly-reliable fused sensor glucose value based on signals from a plurality of redundant sensing electrodes, calibrating sensors, detecting interferents within close proximity of one or more sensing electrodes, and testing surface area characteristics of electroplated electrodes. Advantageously, impedance-related parameters can be defined that are substantially glucose-independent over specific ranges of frequencies. An Application Specific Integrated Circuit (ASIC) enables implementation of the EIS-based diagnostics, fusion algorithms, and other processes based on measurement of EIS-based parameters.

Application of electrochemical impedance spectroscopy in sensor systems, devices, and related methods

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Northridge, CA, United States of America

Manjunath Sirigiri