SYSTEM AND METHODS FOR PROCESSING ANALYTE SENSOR DATA
First Claim
1. A method for calibrating an analyte sensor, the method comprising:
- receiving, with an electronic device, sensor data from an analyte sensor, wherein the sensor data comprises one or more sensor data points;
receiving reference data from a reference analyte monitor, wherein the reference data comprises one or more reference data points;
matching reference data to substantially time corresponding sensor data to form a calibration set, wherein the calibration set comprises one or more matched data pairs;
creating a conversion function based at least in part on the calibration set; and
converting the sensor data into calibrated data using the conversion function, wherein the sensor data points are smoothed using a data smoothing filter, and wherein the matching includes a time lag compensation based at least in part on a time delay introduced by the data smoothing filter.
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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.
287 Citations
24 Claims
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1. A method for calibrating an analyte sensor, the method comprising:
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receiving, with an electronic device, sensor data from an analyte sensor, wherein the sensor data comprises one or more sensor data points; receiving reference data from a reference analyte monitor, wherein the reference data comprises one or more reference data points; matching reference data to substantially time corresponding sensor data to form a calibration set, wherein the calibration set comprises one or more matched data pairs; creating a conversion function based at least in part on the calibration set; and converting the sensor data into calibrated data using the conversion function, wherein the sensor data points are smoothed using a data smoothing filter, and wherein the matching includes a time lag compensation based at least in part on a time delay introduced by the data smoothing filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for calibrating an analyte sensor, the method comprising:
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receiving, with an electronic device, sensor data associated with a data stream from an analyte sensor, wherein the sensor data comprises one or more sensor data points; receiving reference data from a reference analyte monitor, wherein the reference data comprises one or more reference data points; matching reference data to substantially time corresponding sensor data to form a calibration set, wherein the calibration set comprises one or more matched data pair; creating a conversion function based at least in part on the calibration set; and converting sensor data into calibrated data using the conversion function, wherein the matching includes a time lag compensation. - View Dependent Claims (10, 11, 12)
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13. A system for calibrating an analyte sensor, the system comprising:
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a sensor data receiving module configured to receive sensor data from an analyte sensor, wherein the sensor data comprises one or more sensor data points; a reference data receiving module configured to receive reference data from a reference analyte monitor, wherein the reference data comprises one or more reference data points; and a processor module configured to match reference data to substantially time corresponding sensor data to form a calibration set comprising one or more matched data pairs, to create a conversion function based at least in part on the calibration set, and to convert sensor data into calibrated data using the conversion function, wherein the sensor data points are smoothed using a data smoothing filter, and wherein the processor module is configured to match the reference data and the sensor data using a time lag compensation based at least in part on a time delay introduced by the data smoothing filter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system for calibrating an analyte sensor, the method comprising:
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a sensor data receiving module configured to receive sensor data from an analyte sensor, wherein the sensor data comprises one or more sensor data points; a reference data receiving module configured to receive reference data from a reference analyte monitor, wherein the reference data comprises one or more reference data points; a processor module configured to match reference data to substantially time corresponding sensor data to form a calibration set, wherein the calibration set comprises one or more matched data pair, wherein the processor module is configured to create a conversion function based at least in part on the calibration set, and wherein the processor module is further configured to convert sensor data into calibrated data using the conversion function, wherein the processor module is further configured to match reference data to substantially time corresponding sensor data using a time lag compensation. - View Dependent Claims (22, 23, 24)
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Specification