Systems and methods for processing and transmitting sensor data

• US 9,439,029 B2
• Filed: 07/25/2014
• Issued: 09/06/2016
• Est. Priority Date: 04/08/2011
• Status: Active Grant

• Current Assignee: DexCom Incorporated
• Original Assignee: DexCom Incorporated
• Inventors: San Vicente, Kenneth, Gauba, Indrawati, Waichal, Siddharth, Walker, Andrew
• Primary Examiner(s): Traore, Fatoumata
• Application Number:
  US14/341,140
• Publication Number:
  US 20140337944A1
• Time in Patent Office: 774 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61B 2560/0238 Means for recording calibration data
• CPC Class Codes: A61B 2562/08 Sensors provided with means for identification, e.g. barcodes or memory chips
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes
• CPC Class Codes: G16H 10/40 for data related to laboratory analysis, e.g. patient specimen analysis
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04L 63/04 for providing a confidential data exchange among entities communicating through data packet networks
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04W 12/041 Key generation or derivation
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

Systems and methods for continuous measurement of an analyte in a host are provided. The system generally includes a continuous analyte sensor configured to continuously measure a concentration of analyte in a host and a sensor electronics module physically connected to the continuous analyte sensor during sensor use, wherein the sensor electronics module is further configured to directly wirelessly communicate sensor information to one or more display devices. Establishment of communication between devices can involve using a unique identifier associated with the sensor electronics module to authenticate communication. Times tracked at the sensor electronics module and the display module can be at different resolutions, and the different resolutions can be translated to facilitate communication. In addition, the frequency of establishing communication channels between the sensor electronics module and the display devices can vary depending upon whether reference calibration information is being updated.

Claims

1. A method for wirelessly exchanging glucose information between a first communication device associated with a continuous glucose sensor and a second communication device associated with a glucose information display device, the method comprising:

exchanging information related to authentication between the first communication device and the second communication device;

wherein the exchange of the authentication information includes determining by the second communication device whether a first device ID that is transmitted by the first communication device matches a second device ID that is stored at the second communication device;

opening a time window periodically for communication between the first communication device and the second communication device at a first rate;

detecting an error at the first communication device;

upon the detection of the error, transmitting a request for reference information from the first communication device to the second communication device and opening the time window between the first communication device and the second communication device at a second rate, wherein the second rate is faster than the first rate;

receiving by the first communication device the reference information responsive to the request from the second communication device; and

resuming the opening of the time window at the first rate subsequent to the receipt of the reference information by the first communication device from the second communication device.

2. The method of claim 1, wherein the detection of the error by the first communication device is based on analysis of sensor data indicating malfunction of the continuous glucose sensor.

3. The method of claim 1, wherein the detection of the error by the first communication device is based on artifacts in sensor signal data.

4. The method of claim 1, further comprising maintaining the opening of the time window at the second rate until expiration of a predetermined time.

5. A system for wirelessly exchanging glucose information between devices, the system comprising:

a sensor electronics module operatively coupled to a continuous glucose sensor, the sensor electronics module configured to wirelessly transmit information related to authentication; and

a display device comprising a display electronics and a user interface, the user interface configured to receive user input and the display device configured to display glucose information, wherein the display electronics are configured to wirelessly receive the authentication information;

wherein the receipt of the authentication information by the display device includes determination of whether a first device ID that is transmitted by the sensor electronics module matches a second device ID that is stored at the display device;

wherein the system synchronizes the sensor electronics module and the display device to open a time window periodically for communication between the sensor electronics module and the display device at a first rate; and

the sensor electronics module is configured to detect an error, and upon the detection of the error, transmit a request for reference information to the display device; and

wherein the system further synchronizes the sensor electronics module and the display device to open the time window between the sensor electronics module and the display device at a second rate, wherein the second rate is faster than the first rate;

wherein the sensor electronics module is further configured to receive the reference information responsive to the request from the display device; and

wherein the system is further configured to synchronize the sensor electronics module and the display device to resume the opening of the time window at the first rate subsequent to the receipt of the reference information by the sensor electronics module from the display device.

6. The system of claim 5, wherein the detection of the error by the sensor electronics module is based on analysis of sensor data that indicates malfunction of the continuous glucose sensor.

7. The system of claim 5, wherein the detection of the error by the sensor electronics module is based on artifacts in sensor signal data.

8. The system of claim 5, wherein the system is further configured to maintain the opening of the time window at the second rate until expiration of a predetermined time.

9. A system for wirelessly transmitting data between devices, the system comprising computer-readable instructions stored in computer memory, wherein the instructions, when executed by one or more processors of the system, cause the system to:

exchange information related to authentication between a first communication device and a second communication device;

wherein the exchange of the authentication information includes determination whether a first device ID that is transmitted by the first communication device matches a second device ID that is stored at the second communication device;

open a time window periodically for communication between the first communication device and the second communication device at a first rate;

detect an error at the first communication device;

upon the detection of the error, transmit a request for reference information from the first communication device to the second communication device and open the time window between the first communication device and the second communication device at a second rate, wherein the second rate is faster than the first rate;

receive by the first communication device the reference information responsive to the request from the second communication device; and

resume the opening of the time window at the first rate subsequent the receipt of the reference information by the first communication device from the second communication device.

10. The system of claim 9, wherein the first communication device is operatively connected to a continuous glucose sensor, and wherein the detection of the error by the first communication device is based on analysis of sensor data that indicates malfunction of the continuous glucose sensor.

11. The system of claim 9, wherein the first communication device is operatively connected to a continuous glucose sensor, and wherein the detection of the error by the first communication device is based on artifacts in sensor signal data.

12. The system of claim 9, wherein the instructions, when executed by the one or more processors of the system, further cause the system to maintain the opening of the time window at the second rate until expiration of a predetermined time.