Temperature-compensated analyte monitoring devices, systems, and methods thereof

• US 9,974,472 B2
• Filed: 06/18/2012
• Issued: 05/22/2018
• Est. Priority Date: 06/16/2011
• Status: Active Grant

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Inventors: Hayter, Gary A., Bernstein, Daniel M., Fennell, Martin J., Love, Michael R., Doniger, Kenneth J., Zhang, Songbiao, Sloan, Mark K., Cho, Hyun, Kunich, Theodore J., Cole, Jean-Pierre, Thomas, Christopher A., Budiman, Erwin S., Li, David L., Cheng, Royce, Hoss, Udo
• Primary Examiner(s): Jang, Christian
• Assistant Examiner(s): MESSERSMITH, ERIC J
• Application Number:
  US13/526,394
• Publication Number:
  US 20130158376A1
• Time in Patent Office: 2,164 Days
• Field of Search: 600345, 600347, 600365
• CPC Class Codes: A61B 2560/0252 using ambient temperature
• CPC Class Codes: A61B 2562/0271 Thermal or temperature sensors
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/14503 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors A61B5/1459, A61B5/1464, A61B5/1473, A61B5/1482, A61B5/14865 take precedence
• 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 5/7225 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, devices and systems related providing accurate glucose levels in view of temperatures that may adversely affect glucose value.

Claims

1. A method of determining an analyte level by compensating for ambient temperature using a single temperature sensor, the method comprising:

receiving a sensor signal derived from an in vivo analyte sensor;

detecting a temperature measurement from a temperature sensor;

determining, with a processor, whether a threshold requirement is exceeded based on the temperature measurement; and

determining, with the processor, a temperature-compensated analyte sensor signal;

wherein when the threshold requirement is not exceeded, the temperature-compensated analyte sensor signal is determined using the temperature measurement; and

wherein when the threshold requirement is exceeded, the temperature-compensated analyte sensor signal is always determined using an ambient-compensated temperature that is derived by compensating the temperature measurement for ambient temperature.

2. The method of claim 1, wherein the ambient-compensated temperature is derived by adding a correction factor to the temperature measurement.

3. The method of claim 1, wherein the analyte is glucose.

4. The method of claim 1, wherein the threshold requirement is exceeded when a value of the temperature measurement exceeds the threshold requirement.

5. The method of claim 1, wherein the threshold requirement is exceeded when a rate-of-change of the temperature measurement exceeds the threshold requirement.

6. The method of claim 1, further comprising determining analyte concentration based on the temperature-compensated analyte sensor signal.

7. The method of claim 6, further comprising displaying the analyte concentration on a display.

8. The method of claim 7, wherein when the temperature measurement falls within a first predetermined range, the method comprises displaying temperature uncompensated analyte concentration on the display.

9. The method of claim 7, wherein when the temperature measurement falls within a second predetermined range, the method comprises displaying temperature compensated analyte concentration on the display.

10. An analyte monitoring device, comprising:

a housing;

a processor coupled to the housing;

wherein an in vivo analyte sensor is communicably coupled to the processor;

wherein a temperature sensor is communicably coupled to the processor;

memory communicably coupled to the processor, wherein the memory includes instructions stored therein that, when executed by the processor, cause the processor to;

receive a sensor signal from the in vivo analyte sensor;

detect a temperature measurement from the temperature sensor;

determine whether a threshold requirement is exceeded based on the temperature measurement; and

determine a temperature-compensated analyte sensor signal;

wherein when the threshold requirement is not exceeded, the temperature-compensated analyte sensor signal is determined using the temperature measurement; and

wherein when the threshold requirement is exceeded, the temperature-compensated analyte sensor signal is always determined using an ambient-compensated temperature that is derived by compensating the temperature measurement for ambient temperature.

11. The analyte monitoring device of claim 10, wherein the ambient-compensated temperature is derived by adding a correction factor to the temperature measurement.

12. The analyte monitoring device of claim 10, wherein the analyte is glucose.

13. The analyte monitoring device of claim 10, wherein the threshold requirement is exceeded when a value of the temperature measurement exceeds the threshold requirement.

14. The analyte monitoring device of claim 10, wherein the threshold requirement is exceeded when a rate-of-change of the temperature measurement exceeds the threshold requirement.

15. An analyte monitoring system, comprising:

an on-body unit, comprising;

a first processor and first memory communicably coupled to the first processor;

an in vivo analyte sensor communicably coupled to the first processor; and

a temperature sensor communicably coupled to the first processor; and

a receiver configured to communicate with the on-body unit, the receiver comprising;

a second processor and second memory communicably coupled to the second processor;

wherein at least one of the first memory and second memory includes instructions stored therein that, when executed by at least one of the first and second processors, cause the at least one first and second processor to;

receive a sensor signal from the in vivo analyte sensor;

detect a temperature measurement from the temperature sensor;

determine whether a threshold requirement is exceeded based on the temperature measurement; and

determine a temperature-compensated analyte sensor signal;

wherein when the threshold requirement is not exceeded, the temperature-compensated analyte sensor signal is determined using the temperature measurement; and

wherein when the threshold requirement is exceeded, the temperature-compensated analyte sensor signal is always determined using an ambient-compensated temperature that is derived by compensating the temperature measurement for ambient temperature.

16. The analyte monitoring system of claim 15, wherein the ambient-compensated temperature is derived by adding a correction factor to the temperature measurement.