公开(公告)号：US20130331674A1

公开(公告)日：2013-12-12

申请号：US13778630

申请日：2013-02-27

Applicant: MEDTRONIC MINIMED, INC.

Inventor： Ning Yang ,  Raghavendhar Gautham ,  Bradley C. Liang ,  Rajiv Shah ,  Catherine M. Szyman ,  Michael E. Miller ,  Jenn-Hann Larry Wang ,  Yiwen Li ,  Wayne A. Morgan ,  Paris Chen ,  Robert C. Mucic ,  Genival D. de Barros ,  Carlos A. Callirgos ,  Manjunath Sirigiri ,  Joseph Paul Brinson

IPC: G01R35/00 ,  A61B5/145

CPC classification number: A61B5/1495 ,  A61B5/0537 ,  A61B5/0538 ,  A61B5/14503 ,  A61B5/14532 ,  A61B5/1459 ,  A61B5/1473 ,  A61B5/14865 ,  A61B5/4839 ,  A61B5/6849 ,  A61B5/6852 ,  A61B5/7203 ,  A61B5/7221 ,  A61B5/7225 ,  A61B5/7242 ,  A61B5/746 ,  A61B2562/0214 ,  A61B2562/04 ,  A61M5/14244 ,  A61M5/14276 ,  A61M5/1582 ,  A61M5/1723 ,  A61M2005/1726 ,  G01N27/026 ,  G01N27/028 ,  G01N27/416 ,  G01N27/4163 ,  G01N33/49 ,  G01N33/66 ,  G01N33/96 ,  G01R35/00 ,  G01R35/005

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.

公开(公告)号：US20130328578A1

公开(公告)日：2013-12-12

申请号：US13778473

申请日：2013-02-27

Applicant: MEDTRONIC MINIMED, INC.

Inventor： Rajiv Shah ,  Robert C. Mucic ,  Genival D. de Barros ,  Carlos A. Callirgos ,  Manjunath Sirigiri ,  Joseph Paul Brinson

IPC: G01N27/02

CPC classification number: G01N27/4163 ,  A61B5/0537 ,  A61B5/0538 ,  A61B5/14503 ,  A61B5/14532 ,  A61B5/1459 ,  A61B5/1473 ,  A61B5/14865 ,  A61B5/1495 ,  A61B5/4839 ,  A61B5/6849 ,  A61B5/6852 ,  A61B5/7203 ,  A61B5/7221 ,  A61B5/7225 ,  A61B5/7242 ,  A61B5/746 ,  A61B2562/0214 ,  A61B2562/04 ,  A61M5/14244 ,  A61M5/14276 ,  A61M5/1582 ,  A61M5/1723 ,  A61M2005/1726 ,  G01N27/026 ,  G01N27/028 ,  G01N27/416 ,  G01N33/49 ,  G01N33/66 ,  G01N33/96 ,  G01R35/00 ,  G01R35/005

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.