System and methods for processing analyte sensor data
First Claim
1. A continuous glucose sensor system, the system comprising:
- a sensor configured to measure a glucose concentration in a host;
sensor electronics configured to process continuous glucose sensor data from the sensor; and
a user interface configured to display information associated with the continuous glucose sensor data, wherein the information comprises one or more prospectively calibrated glucose sensor values and a plurality of different graphical representations indicative of smoothed glucose trend information over a plurality of different predetermined time periods to provide a plurality of different resolutions of the smoothed glucose trend information, wherein the user interface is configured to selectively display the plurality of different graphical representations responsive to a user selection, wherein the smoothed glucose trend information comprises a plurality of time-spaced sensor values, wherein the sensor electronics are configured to smooth the plurality of time-spaced sensor values associated with a predetermined window of the continuous glucose sensor data, and wherein the user interface is configured to display sensor data or not based at least in part on a level of stability of the continuous glucose sensor data, wherein the level of stability is based at least in part on an evaluation of a sensor sensitivity associated with signal strength with respect to glucose concentration.
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Abstract
Systems and methods for processing sensor analyte data, including initiating calibration, updating calibration, evaluating clinical acceptability of reference and sensor analyte data, and evaluating the quality of sensor calibration. During initial calibration, the analyte sensor data is evaluated over a period of time to determine stability of the sensor. The sensor may be calibrated using a calibration set of one or more matched sensor and reference analyte data pairs. The calibration may be updated after evaluating the calibration set for best calibration based on inclusion criteria with newly received reference analyte data. Fail-safe mechanisms are provided based on clinical acceptability of reference and analyte data and quality of sensor calibration. Algorithms provide for optimized prospective and retrospective analysis of estimated blood analyte data from an analyte sensor.
1008 Citations
28 Claims
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1. A continuous glucose sensor system, the system comprising:
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a sensor configured to measure a glucose concentration in a host; sensor electronics configured to process continuous glucose sensor data from the sensor; and a user interface configured to display information associated with the continuous glucose sensor data, wherein the information comprises one or more prospectively calibrated glucose sensor values and a plurality of different graphical representations indicative of smoothed glucose trend information over a plurality of different predetermined time periods to provide a plurality of different resolutions of the smoothed glucose trend information, wherein the user interface is configured to selectively display the plurality of different graphical representations responsive to a user selection, wherein the smoothed glucose trend information comprises a plurality of time-spaced sensor values, wherein the sensor electronics are configured to smooth the plurality of time-spaced sensor values associated with a predetermined window of the continuous glucose sensor data, and wherein the user interface is configured to display sensor data or not based at least in part on a level of stability of the continuous glucose sensor data, wherein the level of stability is based at least in part on an evaluation of a sensor sensitivity associated with signal strength with respect to glucose concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system for displaying continuous glucose sensor data, the system comprising:
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a sensor configured to measure a glucose concentration in a host; a processor module or sensor electronics configured to process continuous glucose sensor data from the sensor; and a user interface configured to display information associated with the continuous glucose sensor data, wherein the information comprises one or more prospectively calibrated glucose sensor values and a plurality of different graphical representations indicative of smoothed glucose trend information over a plurality of different predetermined time periods to provide a plurality of different resolutions of the smoothed glucose trend information, wherein the user interface is configured to selectively display the plurality of different graphical representations responsive to a user selection, wherein the smoothed glucose trend information comprises a plurality of time-spaced sensor values, wherein the processor module or sensor electronics are configured to smooth the plurality of time-spaced sensor values associated with a predetermined window of the continuous glucose sensor data, and wherein the user interface is configured to display sensor data or not based at least in part on a level of stability of the continuous glucose sensor data, wherein the level of stability is based at least in part on an evaluation of a sensor sensitivity associated with signal strength with respect to glucose concentration; wherein the processor module or sensor electronics are configured to receive reference glucose data from a reference glucose monitor;
wherein the processor module or sensor electronics are further configured to determine a level of clinical risk of a relative difference between the reference glucose data and time-corresponding smoothed sensor data; and
wherein the level of clinical risk is based at least in part on a value of the reference glucose data and a value of the smoothed sensor data.
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Specification