Method and apparatus for detecting false hypoglycemic conditions
Embodiments of the present disclosure include detecting a concurrent occurrence of a decrease in monitored analyte level and a corresponding decrease in monitored on-skin temperature, confirming a presence of an impending hypoglycemic condition, and asserting a notification corresponding to the confirmed impending hypoglycemic condition. Devices, methods, systems and kits incorporating the same are also provided.
1. A system, comprising:
an analyte sensor positioned in fluid contact with interstitial fluid under a skin layer and configured to generate signals corresponding to a monitored analyte level in the interstitial fluid;
sensor electronics electrically coupled to the analyte sensor and configured to generate analyte data based on the signals generated by the analyte sensor; and
a data receiver configured to receive the generated analyte data from the sensor electronics, the data receiver configured to trigger a hold assertion function to temporarily prevent the assertion of a programmed notification after the programmed notification has initiated when a rate of change of the monitored analyte level determined from the generated analyte data exceeds a predetermined analyte threshold during a monitoring time period, and to assert the programmed notification when the rate of change of a monitored temperature exceeds a predetermined temperature threshold during the monitoring time period.
2. The system of claim 1 , wherein the predetermined analyte threshold includes a decreasing rate of the analyte level of approximately 2 mg/dL/minute.
3. The system of claim 1 , wherein the asserted programmed notification indicates a hypoglycemic condition.
4. The system of claim 1 , wherein the data receiver is configured to assert the programmed notification when a direction of the analyte level rate of change and a direction of the monitored temperature rate of change are the same.
5. The system of claim 1 , wherein the monitored analyte level includes one or more of glucose level or lactate level.
6. The system of claim 1 , wherein the data receiver is configured to receive monitored temperature information to determine the rate of change of the monitored temperature.
7. The system of claim 1 , wherein the predetermined temperature threshold includes a decreasing rate of a temperature level of approximately 2° C./15 minutes.
8. The system of claim 1 , wherein the analyte sensor includes a plurality of electrodes including a working electrode comprising an analyte-responsive enzyme bonded to a polymer disposed on the working electrode.
9. The system of claim 8 , wherein the analyte-responsive enzyme is chemically bonded to the polymer disposed on the working electrode.
10. The system of claim 8 , wherein the working electrode comprises a mediator bonded to the polymer disposed on the working electrode.
11. The system of claim 10 , wherein the mediator is crosslinked with the polymer disposed on the working electrode.
12. The system of claim 1 , wherein the analyte sensor includes a plurality of electrodes including a working electrode comprising a mediator bonded to a polymer disposed on the working electrode.
13. A system, comprising
sensor electronics configured to receive signals from an analyte sensor in fluid contact with interstitial fluid, and to generate analyte data corresponding to a monitored analyte level in interstitial fluid; and
a data receiver configured to receive the generated analyte data from the sensor electronics, the data receiver configured to temporarily prevent the assertion of a programmed notification after the programmed notification has initiated when a rate of change of the monitored analyte level determined from the generated analyte data exceeds a predetermined analyte threshold during a monitoring time period, but to assert the programmed notification when a rate of change of a monitored temperature exceeds a predetermined temperature threshold during the monitoring time period.
14. The system of claim 13 , wherein the predetermined analyte threshold includes a decreasing rate of the analyte level of approximately 2 mg/dL/minute.
15. The system of claim 13 , wherein the predetermined temperature threshold includes a decreasing rate of a temperature level of approximately 2° C./15 minutes.
16. The system of claim 13 , wherein the data receiver is configured to assert the programmed notification when a direction of the analyte level rate of change and a direction of the temperature level rate of change are the same.