CALIBRATION TECHNIQUES FOR A CONTINUOUS ANALYTE SENSOR
Disclosed herein are systems and methods for calibrating a continuous analyte sensor, such as a continuous glucose sensor. One such system utilizes one or more electrodes to measure an additional analyte. Such measurements may provide a baseline or sensitivity measurement for use in calibrating the sensor. Furthermore, baseline and/or sensitivity measurements may be used to trigger events such as digital filtering of data or suspending display of data.
1 . A system for processing sensor data from an analyte sensor in a host, the system comprising:
an analyte sensor configured to provide sensor data associated with an analyte concentration in a host; and
a processor module configured to calibrate the sensor data based on a measurement indicative of a change in sensitivity over a time period.
2 . The system of claim 1 , wherein the processor module is further configured to calibrate the sensor data based on an external reference value.
3 . The system of claim 1 , wherein the measurement is independent of an external reference value.
4 . The system of claim 1 , wherein the measurement is performed by the analyte sensor.
5 . The system of claim 1 , wherein the measurement utilizes one or more electrodes of the analyte sensor.
6 . The system of claim 1 , wherein the measurement is based on an auxiliary signal.
7 . The system of claim 1 , wherein the measurement is indicative of a constant non-glucose analyte concentration.
8 . The system of claim 1 , wherein the processor module is configured to request an external reference value in response to the measurement exceeding a threshold.
9 . The system of claim 1 , wherein the processor module is configured to calibrate the sensor data at a frequency selected based on the measurement.
10 . The system of claim 1 , wherein the processor module is configured to calibrate the sensor data in response to the measurement exceeding a threshold.
11 . The system of claim 1 , wherein the processor module is configured to recalibrate the sensor data based on the measurement.
12 . The system of claim 1 , wherein the processor module is configured to augment a previous calibration based on the measurement.
13 . The system of claim 1 , wherein the processor module is configured to determine a sensor stability based on the measurement.
14 . The system of claim 13 , wherein the processor module is configured to selectively display the sensor data based on the determined sensor stability.
15 . The system of claim 1 , wherein the analyte sensor is a glucose sensor.