Advanced continuous analyte monitoring system

• US 10,231,653 B2
• Filed: 09/28/2011
• Issued: 03/19/2019
• 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:
  US13/247,856
• Publication Number:
  US 20120078071A1
• Time in Patent Office: 2,729 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

Systems and methods for processing, transmitting, and displaying data received from a continuous analyte (e.g., glucose) sensor are provided. A sensor system can comprise a sensor electronics module that includes power saving features, e.g., a low power measurement circuit that can be switched between a measurement mode and a low power mode, wherein charging circuitry continues to apply power to electrodes of a sensor during the low power mode. The sensor electronics module can be switched between a low power storage mode and a higher power operational mode via a switch, e.g., a reed switch or optical switch. A validation routine can be implemented to ensure an interrupt signal sent from the switch is valid. The sensor can be physically connected to the sensor electronics module in direct wireless communication with a plurality of different display devices.

Claims

1. A method for placing a sensor electronics module in a storage mode, the sensor electronics module comprising electronics configured to process and to transmit data from a continuous analyte sensor, the method comprising:

receiving a predetermined storage mode command from an external telemetry device via a telemetry module of a sensor electronics module;

initiating a storage mode using the sensor electronics module in response to receiving the predetermined storage mode command, wherein initiating the storage mode comprises initiating a routine to power down electronic components of the sensor electronics module;

placing a switch of the sensor electronics module in a first state;

monitoring, using circuitry of the sensor electronics module, for an interrupt signal from the switch;

placing the switch in a second state;

sending an interrupt signal in response to placing the switch in the second state;

initiating a validation routine in response to receipt of the interrupt signal; and

deactivating the storage mode based on the validation routine indicating that the interrupt signal is valid, the validation routine indicating that the interrupt signal is valid based at least in part on determining, at each of a plurality of predetermined time intervals, that the interrupt signal continues for a predetermined amount of time encompassing the plurality of predetermined time intervals, and wherein deactivating the storage mode comprises initiating a routine to power up the electronic components of the sensor electronics module.

2. The method of claim 1, wherein the method is performed repeatedly.

3. The method of claim 1, wherein the switch is a reed switch, wherein placing the switch in the first state comprises placing a magnet in a proximity to the reed switch, and wherein placing the switch in the second state comprises removing the magnet from a proximity to the reed switch.

4. The method of claim 1, wherein the switch is an optical switch, and wherein placing the switch in the second state comprises removing a protective cover over the optical switch.

5. The method of claim 1, wherein the sensor electronics module is configured to not re-enter the storage mode after the sensor electronics module has been taken out of the storage mode.

6. The method of claim 1, wherein the storage mode command has a predetermined waveform.

7. The method of claim 1, wherein the interrupt signal has a predetermined waveform.

8. The method of claim 1, wherein the validation routine is performed using electronic circuitry that is separate from a processor of the sensor electronics module.

9. The method of claim 1, wherein the validation routine performs a plurality of iterative tests to determine if the interrupt signal is valid, wherein if one of the iterative tests fails, then no further iterative tests are performed on the interrupt signal and the validation routine is ended.

10. The method of claim 1, wherein the predetermined storage command is received over a RF interface included in the telemetry module of the sensor electronics module.

11. The method of claim 1, further comprising determining by a processor whether the interrupt signal is received from the switch.

12. The method of claim 1, wherein the switch is maintained in the second state when the interrupt signal reaches a predetermined signal level at each of the predetermined time intervals.