Analyte Monitoring Device and Methods

• US 20130116524A1
• Filed: 11/07/2012
• Published: 05/09/2013
• Est. Priority Date: 11/07/2011
• Status: Active Grant

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Inventors: Cole, Jean-Pierre, Fennell, Martin J.
• Granted Patent: US 9,980,669 B2
• Time in Patent Office: Days
• US Class Current: 600/347
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/0026 characterised by the transmission medium
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 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: A61B 5/6833 Adhesive patches
• CPC Class Codes: A61B 5/72 Signal processing specially adapted for physiological signals or for diagnostic purposes character recognition, recognising digital ink, document-oriented image-based pattern recognition G06V30/00; recognition or understanding of postal images G06V30/424
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F

Abstract

Methods and devices for providing application specific integrated circuit architecture for a two electrode analyte sensor or a three electrode analyte sensor are provided. Systems and kits employing the same are also provided.

Claims

1. An analyte monitoring device, comprising:

an analyte sensor having a plurality of sensor electrodes, the analyte sensor having at least a portion in fluid contact with interstitial fluid under a skin layer; and

sensor electronics coupled to the sensor electrodes of the analyte sensor and in signal communication with the analyte sensor, the sensor electronics including analog front end circuitry and programmed, or including programmable logic, to process signals generated by the analyte sensor and received by the analog front end circuitry, the signals generated by the analyte sensor corresponding to a monitored analyte level in the interstitial fluid;

wherein the analog front end circuitry of the sensor electronics includes a single offset for calibration of the sensor electronics, and further

wherein the analog front end circuitry of the sensor electronics are referenced to a reference potential.

2. The device of claim 1 wherein the analog front end circuitry is provided with a fixed voltage between a working electrode and a reference electrode of the sensor to reference the analog front end circuitry of the sensor electronics to the reference potential.

3. The device of claim 2, wherein the fixed voltage includes the poise voltage associated with the analyte sensor.

4. The device of claim 1, wherein the analyte sensor and the sensor electronics are included within an integrated housing.

5. The device of claim 4, wherein the integrated housing is configured to be worn on a skin surface of a patient.

6. The device of claim 1, wherein the analyte sensor is configured to operate for a period of at least 14 days.

7. The device of claim 1, wherein the sensor electronics includes a data communication component to communicate the processed signals to a remote device.

8. The device of claim 7, wherein the data communication component includes a radio frequency (RF) data communication component.

9. The device of claim 7 further comprising an antenna coupled to the data communication component.

10. The device of claim 9, wherein the antenna includes a loop antenna.

11. The device of claim 1 further comprising a guard trace surrounding the plurality of sensor electrodes of the analyte sensor.

12. The device of claim 1 further comprising an analog-to-digital converter, wherein the analog-to-digital converter is referenced to the same reference potential as the analog front end circuitry of the sensor electronics.

13. A method, comprising:

positioning at least a portion of an analyte sensor in fluid contact with interstitial fluid under a skin layer, the analyte sensor having a plurality of sensor electrodes;

coupling sensor electronics to the sensor electrodes of the analyte sensor, wherein the sensor electronics are in signal communication with the analyte sensor, the sensor electronics including analog front end circuitry; and

processing, using the sensor electronics, signals generated by the analyte sensor and received by the analog front end circuitry, the signals generated by the analyte sensor corresponding to a monitored analyte level in the interstitial fluid;

wherein the analog front end circuitry of the sensor electronics includes a single offset for calibration of the sensor electronics, and further

wherein the analog front end circuitry of the sensor electronics are referenced to a reference potential.

14. The method of claim 13 further including providing a fixed voltage between a working electrode and a reference electrode of the sensor to reference the analog front end circuitry of the sensor electronics to the reference potential.

15. The method of claim 14, wherein the fixed voltage includes the poise voltage associated with the analyte sensor.

16. The method of claim 14, wherein the fixed voltage includes 40 mV.

17. The method of claim 13, wherein the analyte sensor is configured to operate for a period of at least 14 days.

18. The method of claim 13 further including providing a data communication component to communicate the processed signal to a remote location, and coupling an antenna to the data communication component.

19. The method of claim 13 further including surrounding the plurality of sensor electrodes of the analyte sensor with a guard trace.

20. The method of claim 13 further including operatively coupling an analog-to-digital converter to the analyte front end circuitry of the sensor electronics, wherein the analog-to-digital converter is referenced to the same reference potential as the analog front end circuitry.