Advanced continuous analyte monitoring system

• US 10,687,740 B2
• Filed: 01/28/2019
• Issued: 06/23/2020
• Est. Priority Date: 09/29/2010
• Status: Active Grant

• Current Assignee: DexCom Incorporated
• Original Assignee: DexCom Incorporated
• Inventors: Bohm, Sebastian, Dervaes, Mark, Johnson, Eric, Kamath, Apurv Ullas, Larvenz, Shawn, Leach, Jacob S., Lieu, Phong, Mahalingam, Aarthi, Miller, Tom, Neale, Paul V., Pryor, Jack, Peyser, Thomas A., Rong, Daiting, San Vicente, Kenneth, Shariati, Mohammad Ali, Simpson, Peter C., Wightlin, Matthew
• Primary Examiner(s): Jang, Christian
• Assistant Examiner(s): Toth, Karen E
• Application Number:
  US16/259,930
• Publication Number:
  US 20190167169A1
• Time in Patent Office: 512 Days
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2560/0214 of power generation or supply
• CPC Class Codes: A61B 2562/02 Details of sensors specially adapted for in-vivo measurements
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/14503 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors A61B5/1459, A61B5/1464, A61B5/1473, A61B5/1482, A61B5/14865 take precedence
• CPC Class Codes: A61B 5/14507 specially adapted for measuring characteristics of body fluids other than blood devices for taking samples of body liquids A61B10/0045
• CPC Class Codes: A61B 5/1451 for interstitial fluid
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1468 using chemical or electrochemical methods, e.g. by polarographic means A61B5/1486 takes precedence
• CPC Class Codes: A61B 5/14865 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3287 by switching off individual functional units in the computer system
• CPC Class Codes: G08C 17/02 using a radio link

Abstract

The present invention relates generally to systems and methods for processing, transmitting, and displaying data received from continuous analyte sensor, such as a glucose sensor. In some embodiments, the continuous analyte sensor system comprises a sensor electronics module that includes power saving features. One feature includes a low power measurement circuit that can be switched between a measurement mode and a low power mode, in which charging circuitry continues to apply power to electrodes of a sensor during the low power mode. In addition, the sensor electronics module can be switched between in a low power storage mode higher power operational mode via a switch. The switch can include a reed switch or optical switch, for example. A validation routine can also be implemented to ensure an interrupt signal sent from the switch is valid. The continuous analyte sensor can be physically connected to a sensor electronics module, which is in direct wireless communication with a plurality of different display devices.

Claims

1. A system for continuous measurement of an analyte in a host, the system comprising:

an electrochemical continuous analyte sensor configured for transcutaneous implantation in the host for measuring analyte values; and

a sensor electronics module coupled to the continuous analyte sensor, the sensor electronics module comprising a switch configured to switch the sensor electronics module between a first low power mode and a second higher power mode,

wherein the switch is configured to switch from the first low power mode to the second higher power mode when the sensor electronics module detects a signal output of the electrochemical continuous analyte sensor above a predetermined threshold, wherein the predetermined threshold is selected based on values that would indicate the sensor electronics module is not operatively connected to the electrochemical continuous analyte sensor and/or the electrochemical continuous analyte sensor is not implanted in the host,

wherein the detecting comprises the sensor electronics module performing a sensor measurement in the first low power mode.

2. The system of claim 1, wherein power consumption due to wireless transmission and/or receipt of data has been turned off in the first low power mode.

3. The system of claim 1, wherein the system further comprises a mounting unit configured to hold a portion of the continuous analyte sensor, wherein the electronics module is configured to couple to the mounting unit.

4. The system of claim 1, wherein the sensor electronics module is configured to periodically perform sensor measurements in the first low power mode.

5. The system of claim 1, wherein a telemetry module of the sensor electronics module has been turned off during the first low power mode.

6. The system of claim 5, wherein the telemetry module is for transmitting data between the sensor electronics module and one or more display devices.

7. The system of claim 6, comprising the one or more display devices.

8. The system of claim 1, configured so that if the sensor electronics module measures a sensor reading below the predetermined threshold, then the sensor electronics module remains in the low power mode.

9. A method of increasing a useful life of a sensor electronics module coupled to an electrochemical continuous analyte sensor configured for transcutaneous implantation in a host for measuring analyte values, the method comprising:

entering the sensor electronics module into a low power mode, thereby extending the useful life of the sensor electronics module;

performing a sensor measurement in the low power mode; and

causing the sensor electronics module to enter a higher power consuming, operational mode when a sensor reading of the electrochemical continuous analyte sensor above a predetermined threshold is detected, wherein the predetermined threshold is selected based on values that would indicate the sensor electronics module is not operatively connected to the electrochemical continuous analyte sensor and/or the electrochemical continuous sensor is not implanted in the host.

10. The method of claim 9, comprising turning off power consumption by the sensor electronics module due to wireless transmission and/or receipt of data in the low power mode.

11. The method of claim 9, comprising periodically performing a sensor measurement in the low power mode.

12. The method of claim 9, comprising turning off a telemetry module in the low power mode.

13. The method of claim 9, wherein if the sensor electronics module measures a sensor reading of the continuous analyte sensor below the predetermined threshold, then the sensor electronics module remains in the low power mode.