Granted Patent B2

US 12,629,066 · App. 17/108,922 · Granted May 19, 2026

Inventors: Thomas A. Peyser (Menlo Park, CA); Naresh C. Bhavaraju (San Diego, CA); Leif N. Bowman (Livermore, CA); Apurv Ullas Kamath (San Diego, CA); Aarthi Mahalingam (San Diego, CA); Jack Pryor (San Diego, CA); Peter C. Simpson (San Diego, CA)

Assignee: Dexcom, Inc.

A61B5/1495A61B5/14532A61B5/1459A61B5/1473A61B5/14865A61B5/7221A61B5/7246A61B5/7278A61B2562/04

Abstract

Claims (23)

1 . A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:

applying, concurrently and via a potentiostat, different bias potentials to a first electrode implanted in the host and a second electrode implanted in the host to generate first sensor data resulting from a first bias potential of the different bias potentials being applied and second sensor data resulting from a second bias potential of the different bias potentials being applied;

receiving the first sensor data from the first electrode, wherein the first sensor data is indicative of a property corresponding to the first electrode when the first bias potential is applied;

receiving the second sensor data from the second electrode, wherein the second sensor data is indicative of the property corresponding to the second electrode when the second bias potential is applied;

determining a magnitude of deviation between a first value of the property corresponding to the first electrode when the first bias potential is applied and a second value of the property corresponding to the second electrode when the second bias potential is applied;

comparing the magnitude of deviation to a predetermined deviation value;

detecting the sensor failure associated with at least one of the first electrode or the second electrode when the magnitude of deviation meets the predetermined deviation value; and

performing a responsive action based at least on the magnitude of deviation and detecting the sensor failure, wherein the responsive action includes automatically shutting off one of the first electrode or the second electrode such that the corresponding one of the bias potentials applied to the first electrode or second electrode is reduced to zero.

2 . The method of claim 1 , wherein the property is sensor sensitivity to an analyte.

3 . The method of claim 1 , wherein the property is baseline.

4 . The method of claim 1 , wherein the first electrode is located adjacent to the second electrode.

5 . The method of claim 1 , wherein the first electrode and the second electrode are separated by a distance of less than about 1 mm at a closest proximity.

6 . The method of claim 1 , wherein the first electrode and the second electrode are separated by a distance of less than about 0.5 mm at a closest proximity.

7 . A continuous analyte monitoring system configured for detecting a sensor failure when implanted in a host, the system comprising:

a first electrode configured to generate first sensor data when implanted in the host and in response to at least a received first bias potential, wherein the first sensor data is indicative of a property corresponding to the first electrode when the first bias potential is applied;

a second electrode configured to generate second sensor data when implanted in a host and in response to at least a received second bias potential different from the first bias potential, wherein the received second bias potential is applied to the second electrode concurrently with application of the first bias potential to the first electrode, and wherein the second sensor data is indicative of a property corresponding to the second electrode when the second bias potential is applied; and

a processor module configured to determine a magnitude of deviation between a first value of the property corresponding to the first electrode when the first bias potential is applied and a second value of the property corresponding to the second electrode when the second bias potential is applied, compare the magnitude of deviation to a predetermined deviation value, detect the sensor failure associated with at least one of the first electrode or the second electrode when the magnitude of deviation meets the predetermined deviation value, and shut off, based at least on the magnitude of deviation and detecting the sensor failure, one of the first electrode or the second electrode.

8 . The continuous analyte monitoring system of claim 7 , wherein the property is sensor sensitivity to an analyte.

9 . The continuous analyte monitoring system of claim 7 , wherein the property is baseline.

10 . The continuous analyte monitoring system of claim 7 , wherein the first electrode is located adjacent to the second electrode.

11 . The continuous analyte monitoring system of claim 7 , wherein the first electrode and the second electrode are separated by a distance of less than about 1 mm at a closest proximity.

12 . The continuous analyte monitoring system of claim 7 , wherein the first electrode and the second electrode are separated by a distance of less than about 0.5 mm at a closest proximity.

13 . The continuous analyte monitoring system of claim 7 , wherein the analyte is glucose.

Assignments (1)

Continuity (5)

References Cited (400)