Application of electrochemical impedance spectroscopy in sensor systems, devices, and related methods
US10156543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2013 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Nov 15, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/1726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.