Optimizing Analyte Sensor Calibration

• US 20100081909A1
• Filed: 09/30/2008
• Published: 04/01/2010
• Est. Priority Date: 09/30/2008
• Status: Active Grant

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories)
• Inventors: Budiman, Erwin Satrya, Harper, Wesley Scott, Dunn, Timothy Christian
• Granted Patent: US 8,219,173 B2
• Time in Patent Office: Days
• US Class Current: 600/365
• 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:

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; and

initiating a calibration routine to calibrate the analyte sensor when the determined temporal proximity is within a predetermined time period.

2. The method of claim 1 wherein initiating the calibration routine includes calibrating the analyte sensor based on the received current blood glucose measurement.

3. The method of claim 2 including determining validity of the current blood glucose measurement.

4. The method of claim 3 wherein determining validity of the current blood glucose measurement includes analyzing the current blood glucose measurement based on a predetermined threshold range, a temperature information, or a combination thereof.

5. The method of claim 2 including determining the validity of an 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 the analyte level, a temperature information, a predetermined analyte level threshold range, or one or more combinations thereof.

7. The method of claim 2 including overriding the upcoming scheduled calibration event when the calibration routine to calibrate the analyte sensor based on the received current blood glucose measurement is successful.

8. The method of claim 1 wherein initiating the calibration routine includes validating one or more calibration condition parameters associated with the calibration of the analyte sensor.

9. The method of claim 1 including generating an output signal confirming completion of the upcoming scheduled calibration event.

10. The method of claim 1 including updating a calibration schedule for calibrating the analyte sensor based on the initiated calibration routine.

11. The method of claim 1 wherein initiating the calibration routine includes automatically performing the calibration routine to calibrate the analyte sensor when the determined temporal proximity is within the predetermined time period.

12. A method, comprising:

receiving a current reference data associated with a monitored analyte level;

determining whether a next scheduled calibration event for calibrating an analyte sensor associated with the monitored analyte level is within a predetermined time period;

validating one or more conditions associated with the calibration of the analyte sensor when the next scheduled calibration event is determined to be within the predetermined time period; and

calibrating the analyte sensor based on the received current reference data.

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

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

15. The method of claim 13 including updating the time spaced calibration schedule based on analyte sensor calibration using the received current reference data

16. The method of claim 12 including associating the current reference data with a corresponding calibrated analyte sensor data.

17. The method of claim 12 including disabling a calibration routine associated with the next scheduled 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, retrieves a time information for an upcoming scheduled calibration event for calibrating an analyte sensor when a current blood glucose measurement is received, determines a temporal proximity between the current blood glucose measurement and the retrieved time information for the upcoming calibration event, and initiates a calibration routine to calibrate the analyte sensor when the determined temporal proximity is within a predetermined time period.

19. The apparatus of claim 18 including a blood glucose strip port configured to receive a blood glucose test strip providing the current blood glucose measurement.

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