Optimizing analyte sensor calibration

• US 8,744,547 B2
• Filed: 07/09/2012
• Issued: 06/03/2014
• Est. Priority Date: 09/30/2008
• Status: Active Grant

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Inventors: Budiman, Erwin Satrya, Harper, Wesley Scott, Dunn, Timothy Christian
• Primary Examiner(s): D'ANGELO, MICHAEL J
• Application Number:
  US13/544,934
• Publication Number:
  US 20120277564A1
• Time in Patent Office: 694 Days
• Field of Search: 600/309, 600/316, 600345-347, 600/365
• US Class Current: 600/347
• 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: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence

Abstract

Method and apparatus for optimizing analyte sensor calibration including receiving a current blood glucose measurement, retrieving a time information for an upcoming scheduled calibration event for calibrating an analyte sensor, determining temporal proximity between the current blood glucose measurement and the retrieved time information for the upcoming calibration event, initiating a calibration routine to calibrate the analyte sensor when the determined temporal proximity is within a predetermined time period, and overriding the upcoming scheduled calibration event using the current blood glucose measurement are provided.

Claims

1. A method, comprising:

retrieving, using one or more processors, time information for a calibration event to calibrate an analyte sensor;

determining, using the one or more processors, temporal proximity between reference analyte data and the retrieved time information for the calibration event; and

calibrating the analyte sensor when the determined temporal proximity is within a predetermined time period.

2. The method of claim 1, wherein calibrating the analyte sensor includes calibrating based on the reference analyte data.

3. The method of claim 2, including determining, using the one or more processors, validity of the reference analyte data.

4. The method of claim 3, wherein determining validity of the reference analyte data includes analyzing the reference analyte data based on a predetermined threshold range, a temperature information, or a combination thereof.

5. The method of claim 2, further including determining, using the one or more processors, a validity of analyte sensor data.

6. The method of claim 5, wherein determining the validity of the analyte sensor data includes one or more of analyzing the analyte sensor data based on one or more of a rate of change of an analyte level, a temperature information, a predetermined analyte level threshold range, or one or more combinations thereof.

7. The method of claim 2, further including overriding an upcoming calibration event when calibrating the analyte sensor based on the reference analyte data is successful.

8. The method of claim 1, further including validating one or more calibration condition parameters associated with the calibration of the analyte sensor.

9. The method of claim 1, further including generating an output signal confirming completion of calibrating the analyte sensor.

10. The method of claim 1, further including updating a calibration schedule based on calibrating the analyte sensor.

11. The method of claim 1, further including automatically calibrating the analyte sensor when the determined temporal proximity is within the predetermined time period.

12. A method, comprising:

determining, using one or more processors, whether a calibration event for calibrating an analyte sensor is within a predetermined time period from receiving reference analyte data;

validating, using the one or more processors, one or more conditions associated with the calibration of the analyte sensor when the calibration event is determined to be within the predetermined time period from the receipt of the reference analyte data; and

calibrating, using the one or more processors, the analyte sensor based on the received reference analyte data when the calibration event is determined to be within the predetermined time period from the receipt of the reference analyte data.

13. The method of claim 12, wherein the analyte sensor is associated with a time spaced calibration schedule including the calibration event.

14. The method of claim 13, wherein the time spaced calibration schedule includes unevenly time spaced calibration events during a life of the analyte sensor.

15. The method of claim 13, further including updating, using the one or more processors, the time spaced calibration schedule based on analyte sensor calibration using the received reference analyte data.

16. The method of claim 12, further including associating, using the one or more processors, the reference analyte data with a corresponding calibrated analyte sensor data.

17. The method of claim 12, further including disabling, using the one or more processors, a calibration routine associated with the calibration event.

18. An apparatus, comprising:

one or more processors; and

a memory operatively coupled to the one or more processors for storing instructions which, when executed by the one or more processors, is configured to retrieve a time information for a calibration event to calibrate an analyte sensor, to determine a temporal proximity between reference analyte data and the retrieved time information for the calibration event, and to calibrate the analyte sensor when the determined temporal proximity is within a predetermined time period.

19. The apparatus of claim 18, further including a port configured to receive the reference analyte data.

20. The apparatus of claim 19, further including a housing coupled to the port and further, wherein the one or more processors and the memory are provided in the housing.