US 11,957,464 B2
Methods, systems, and devices for calibration and optimization of glucose sensors and sensor output
Peter Ajemba, Canyon Country, CA (US); Keith Nogueira, Mission Hills, CA (US); and Brian T. Kannard, Northridge, CA (US)
Assigned to MEDTRONIC MINIMED, INC., Northridge, CA (US)
Filed by Medtronic MiniMed, Inc., Northridge, CA (US)
Filed on Jan. 13, 2022, as Appl. No. 17/574,700.
Application 17/574,700 is a continuation of application No. 16/117,617, filed on Aug. 30, 2018, granted, now 11,311,217.
Claims priority of provisional application 62/558,248, filed on Sep. 13, 2017.
Prior Publication US 2022/0211302 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/1495 (2006.01); A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/021 (2006.01); A61B 5/024 (2006.01); A61B 5/11 (2006.01); A61B 5/145 (2006.01); A61B 5/1455 (2006.01); A61B 5/1468 (2006.01); A61B 5/1486 (2006.01); G01N 27/02 (2006.01); G06N 5/022 (2023.01); G16H 20/17 (2018.01); G16H 40/40 (2018.01); G16H 50/30 (2018.01); G16H 50/70 (2018.01)
CPC A61B 5/1495 (2013.01) [A61B 5/14532 (2013.01); A61B 5/1468 (2013.01); A61B 5/14865 (2013.01); A61B 5/6849 (2013.01); A61B 5/686 (2013.01); G01N 27/026 (2013.01); G06N 5/022 (2013.01); G16H 20/17 (2018.01); G16H 40/40 (2018.01); G16H 50/30 (2018.01); G16H 50/70 (2018.01); A61B 5/0075 (2013.01); A61B 5/02055 (2013.01); A61B 5/021 (2013.01); A61B 5/024 (2013.01); A61B 5/1118 (2013.01); A61B 5/14546 (2013.01); A61B 5/1455 (2013.01); A61B 5/7203 (2013.01); A61B 5/7221 (2013.01); A61B 5/7267 (2013.01); A61B 5/742 (2013.01); A61B 2505/07 (2013.01); A61B 2560/0223 (2013.01); A61B 2560/0252 (2013.01); A61B 2560/0257 (2013.01); A61B 2562/028 (2013.01); A61B 2562/029 (2013.01); A61B 2562/164 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for calibrating one or more sensor parameters of a glucose sensor used for measuring a level of glucose in a body of a user, the glucose sensor including physical sensor electronics, a microcontroller, and a working electrode, the method comprising:
periodically measuring, by the physical sensor electronics, electrode current signal (Isig) values for the working electrode;
generating, by the microcontroller, Electrochemical Impedance Spectroscopy (EIS) parameter values for the working electrode based on an EIS procedure;
measuring, by the physical sensor electronics, Vcntr values of counter voltage for the glucose sensor;
based on the Isig values, the EIS parameter values, the Vcntr values, and a plurality of sensor glucose (SG) predictive models, calculating, by the microcontroller, a respective SG value for each of the SG predictive models;
applying a factory calibration factor, by the microcontroller, to fuse the respective SG values to calculate a single, fused SG value;
performing, by the microcontroller, error detection diagnostics on the single, fused SG value to determine whether a correctable error exists in the single, fused SG value;
in a case where the error detection diagnostics determine that a correctable error exists, correcting, by the microcontroller, the correctable error in the single, fused SG value to generate a corrected, single, fused SG value; and
providing the corrected, single, fused SG value.