Dynamic Analyte Sensor Calibration Based On Sensor Stability Profile

• US 20100274515A1
• Filed: 04/28/2010
• Published: 10/28/2010
• Est. Priority Date: 04/28/2009
• Status: Abandoned Application

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Inventors: Hoss, Udo, Mazza, John Charles
• Application Number:
  US12/769,639
• Publication Number:
  US 20100274515A1
• Time in Patent Office: Days
• US Class Current: 702/104
• 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 40/40 for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

Dynamic sensor calibration schedule management including determining a stability profile of an in vivo analyte sensor in fluid contact with a biological fluid, processing the determined stability profile in conjunction with calibration criteria for the analyte sensor, and modifying a predetermined sensor calibration schedule based on the processed stability profile is provided.

Claims

1. A method, comprising:

determining a stability profile of an in vivo analyte sensor in fluid contact with a biological fluid, determining the stability profile including;

detecting the onset of a calibration routine initialization within a predetermined time period;

performing stability analysis of the analyte sensor; and

time shifting the calibration routine initialization to start at a time period different from the predetermined time period;

processing the determined stability profile in conjunction with calibration criteria for the analyte sensor; and

modifying a predetermined sensor calibration schedule based on the processed stability profile.

2. The method of claim 1, wherein time shifting includes executing the calibration routine following the stability analysis of the analyte sensor.

3. The method of claim 1, wherein time shifting includes delaying the calibration routine initialization past the predetermined time period.

4. The method of claim 1, wherein the analyte sensor includes a glucose sensor.

5. The method of claim 1, wherein the determined stability profile includes a predetermined time period during which the analyte sensor is stable.

6. The method of claim 1, wherein the determined stability profile includes acceptable condition for performing sensor calibration.

7. The method of claim 1, wherein time shifting the calibration routine initialization includes delaying a subsequent scheduled calibration event.

8. A method, comprising:

initializing an analyte sensor;

activating a timer associated with the analyte sensor, the timer related to a stability profile of the analyte sensor;

calibrating the analyte sensor based on a time corresponding reference data based at least in part on a predetermined calibration schedule including a plurality of time periods for performing calibration over the life of the sensor; and

modifying the calibration schedule to time shift the plurality of time periods for performing calibration.

9. The method of claim 8, wherein initializing the analyte sensor includes determining sensor stability.

10. The method of claim 8, wherein the stability profile includes a predetermined time period associated with the sensor stability.

11. The method of claim 8, wherein the reference data is associated with a time corresponding sensor data.

12. The method of claim 8, wherein the reference data is obtained from an in vitro blood glucose meter.

13. A method, comprising:

detecting an input value associated with a reference data;

verifying that an analyte sensor is within its calibration stability duration;

calibrating the analyte sensor based on the detected input value; and

time shifting the initiation of the one or more subsequent scheduled calibration events for the analyte sensor.

14. The method of claim 13, wherein the reference data is received from a blood glucose monitor.

15. The method of claim 13, wherein calibrating the analyte sensor includes determining a sensitivity value associated with the sensor.

16. The method of claim 15, wherein the sensitivity is determined based at least in part on the detected input value associated with the reference data.

17. The method of claim 13, wherein the calibration stability duration is associated with sensor manufacturing information.

18. The method of claim 17, wherein the sensor manufacturing information includes a date of manufacture of the analyte sensor.

19. An apparatus, comprising:

one or more processors;

a memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to determine a stability profile of an in vivo analyte sensor in fluid contact with a biological fluid by detecting the onset of a calibration routine initialization within a predetermined time period, performing stability analysis of the analyte sensor, and time shifting the calibration routine initialization to start at a time period different from the predetermined time period, to process the determined stability profile in conjunction with calibration criteria for the analyte sensor, and to modify a predetermined sensor calibration schedule based on the processed stability profile.

20. The apparatus of claim 19, wherein the memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to execute the calibration routine following the stability analysis of the analyte sensor.

22. The apparatus of claim 19, wherein the memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to delay the calibration routine initialization past the predetermined time period.

23. The apparatus of claim 19, wherein the analyte sensor includes a glucose sensor.

24. The apparatus of claim 19, wherein the determined stability profile includes a predetermined time period during which the analyte sensor is stable.

25. The apparatus of claim 19, wherein the determined stability profile includes acceptable condition for performing sensor calibration.

26. The apparatus of claim 19, wherein the memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to delay subsequent scheduled calibration event.

27. An apparatus, comprising:

one or more processors;

a memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to initialize an analyte sensor, activate a timer associated with the analyte sensor, the timer related to a stability profile of the analyte sensor, calibrate the analyte sensor based on a time corresponding reference data based at least in part on a predetermined calibration schedule including a plurality of time periods for performing calibration over the life of the sensor, and modify the calibration schedule to time shift the plurality of time periods for performing calibration.

28. The apparatus of claim 27, wherein the memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to determine sensor stability.

29. The apparatus of claim 27, wherein the stability profile includes a predetermined time period associated with the sensor stability.

30. The apparatus of claim 27, wherein the reference data is associated with a time corresponding sensor data.

31. The apparatus of claim 27, wherein the reference data is obtained from an in vitro blood glucose monitor.

32. An apparatus, comprising:

one or more processors;

a memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to detect an input value associated with a reference data, verify that an analyte sensor is within its calibration stability duration, calibrate the analyte sensor based on the detected input value, and time shift the initiation of the one or more subsequent scheduled calibration events for the analyte sensor.

33. The apparatus of claim 32, wherein the memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to determine a sensitivity value associated with the sensor.

34. The apparatus of claim 33, wherein the sensitivity is determined based at least in part of on the detected input value associated with the reference data.

35. The apparatus of claim 32, wherein the calibration stability duration is associated with sensor manufacturing information.

36. The apparatus of claim 32, wherein the sensor manufacturing information includes a date of manufacture of the analyte sensor.