US 12,029,560 B2
Analyte sensor with impedance determination
Sebastian Bohm, San Diego, CA (US); Anna Claire Harley-Trochimczyk, San Diego, CA (US); Daiting Rong, San Diego, CA (US); Rui Ma, San Diego, CA (US); Wenjie Lan, San Diego, CA (US); Minglian Shi, San Diego, CA (US); Disha B. Sheth, Oceanside, CA (US); Nicholas Kalfas, San Diego, CA (US); Vincent P. Crabtree, San Diego, CA (US); and Kamuran Turksoy, Clarksburg, MD (US)
Assigned to Dexcom, Inc., San Diego, CA (US)
Filed by DexCom, Inc., San Diego, CA (US)
Filed on Dec. 27, 2019, as Appl. No. 16/728,765.
Claims priority of provisional application 62/786,116, filed on Dec. 28, 2018.
Claims priority of provisional application 62/786,127, filed on Dec. 28, 2018.
Claims priority of provisional application 62/786,208, filed on Dec. 28, 2018.
Claims priority of provisional application 62/786,166, filed on Dec. 28, 2018.
Claims priority of provisional application 62/786,228, filed on Dec. 28, 2018.
Prior Publication US 2020/0205702 A1, Jul. 2, 2020
Int. Cl. A61B 5/1495 (2006.01); A61B 5/00 (2006.01); A61B 5/0537 (2021.01); A61B 5/145 (2006.01); A61B 5/1473 (2006.01); A61B 5/1486 (2006.01); G01N 27/22 (2006.01); G01N 27/24 (2006.01); G01N 33/487 (2006.01); G01N 27/02 (2006.01)
CPC A61B 5/1495 (2013.01) [A61B 5/0537 (2013.01); A61B 5/14532 (2013.01); A61B 5/14546 (2013.01); A61B 5/1473 (2013.01); A61B 5/1486 (2013.01); A61B 5/14865 (2013.01); A61B 5/6844 (2013.01); G01N 27/221 (2013.01); G01N 27/24 (2013.01); G01N 33/48707 (2013.01); A61B 5/0004 (2013.01); A61B 5/0031 (2013.01); A61B 2560/0223 (2013.01); A61B 2560/0252 (2013.01); A61B 2560/0276 (2013.01); G01N 27/026 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An analyte sensor system, comprising:
an analyte sensor comprising a working electrode and a reference electrode, the reference electrode comprising a material that is depleted during use of the analyte sensor; and
a hardware device in communication with the analyte sensor, wherein the hardware device is configured to perform operations comprising:
applying a first bias voltage to the working electrode of the analyte sensor, the first bias voltage less than an operational bias voltage of the working electrode of the analyte sensor;
measuring a first current at the analyte sensor when the first bias voltage is applied;
applying a second bias voltage to the working electrode of the analyte sensor;
measuring a second current at the analyte sensor when the second bias voltage is applied;
detecting a plateau bias voltage using the first current and the second current, wherein the plateau bias voltage is the bias voltage at which a current response stops;
determining if the plateau bias voltage is greater than a plateau bias voltage threshold; and
executing, in response to determining that the plateau bias voltage is greater than the plateau bias voltage threshold, a responsive action at the analyte sensor.