US 12,295,711 B2
Use of electrochemical impedance spectroscopy (EIS) in gross failure analysis
Andrea Varsavsky, Santa Monica, CA (US); Fei Yu, Chatsworth, CA (US); and Ning Yang, Los Angeles, CA (US)
Assigned to Medtronic MiniMed, Inc., Northridge, CA (US)
Filed by Medtronic MiniMed, Inc., Northridge, CA (US)
Filed on Jan. 24, 2023, as Appl. No. 18/100,610.
Application 18/100,610 is a continuation of application No. 17/855,865, filed on Jul. 1, 2022, granted, now 11,717,179.
Application 17/855,865 is a continuation of application No. 17/115,752, filed on Dec. 8, 2020, granted, now 11,382,527, issued on Jul. 12, 2022.
Application 17/115,752 is a continuation of application No. 14/466,160, filed on Aug. 22, 2014, granted, now 10,945,630, issued on Mar. 16, 2021.
Claims priority of provisional application 61/916,637, filed on Dec. 16, 2013.
Prior Publication US 2023/0157566 A1, May 25, 2023
Int. Cl. A61B 5/0537 (2021.01); A61B 5/00 (2006.01); A61B 5/0538 (2021.01); A61B 5/145 (2006.01); A61B 5/1468 (2006.01); A61B 5/1473 (2006.01); A61B 5/1486 (2006.01); A61B 5/1495 (2006.01); A61M 5/142 (2006.01); A61M 5/158 (2006.01); A61M 5/172 (2006.01); G01N 27/02 (2006.01)
CPC A61B 5/0537 (2013.01) [A61B 5/0538 (2013.01); A61B 5/14532 (2013.01); A61B 5/1468 (2013.01); A61B 5/1473 (2013.01); A61B 5/14865 (2013.01); A61B 5/1495 (2013.01); A61B 5/7221 (2013.01); A61B 5/7246 (2013.01); A61M 5/1582 (2013.01); G01N 27/026 (2013.01); A61B 5/6849 (2013.01); A61M 5/14244 (2013.01); A61M 5/14276 (2013.01); A61M 2005/1726 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
a glucose sensor device for determining a concentration of glucose in a body of a user, the sensor device comprising:
a first electrochemical peroxide-based glucose sensor;
a first electrochemical oxygen-based sensor;
a second electrochemical oxygen-based sensor;
a processor; and
a memory storing instructions thereon which, when executed by the processor, cause the sensor device to:
receive a peroxide-based output signal from the first electrochemical peroxide-based glucose sensor, the peroxide-based output signal being indicative of a level of glucose in the body of the user;
receive a first oxygen-based output signal from the first electrochemical oxygen-based sensor and a second oxygen-based output signal from the second electrochemical oxygen-based sensor;
calculate a single oxygen-based signal based on the first and second oxygen-based output signals, wherein the single oxygen-based signal is indicative of the level of glucose in the body of the user;
fuse the peroxide-based output signal and the single oxygen-based signal to calculate a single, fused sensor glucose value for a blood glucose level in the body of the user; and
calculate, based on a membrane resistance of each sensor of the sensor device, a first weight for the peroxide-based output signal and a second weight for the single oxygen-based signal,
wherein the fused sensor glucose value is based on fusing the peroxide-based output signal and the single oxygen-based signal using the first weight and the second weight, respectively.