BACK CALIBRATION OF SENSOR DATA
First Claim
1. A method comprising:
- performing, by a computing device, a calibration of an analyte sensor at a calibration time to produce a calibration factor; and
applying, by the computing device, the calibration factor to raw sensor values measured by the analyte sensor within a back calibration interval prior to the calibration time to produce and/or modify calibrated sensor values from the raw sensor values.
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Accused Products
Abstract
Methods, apparatuses and systems for back calibration of data from a continuous sensor are provided. The continuous sensor may be calibrated periodically by comparing raw sensor values from the sensor to sensor values obtained from a second sensor, such as a blood glucose meter (BGM). Each calibration may produce a calibration factor. In an aspect, the calibration factor may be applied to sensor values acquired prior to the calibration (i.e., back calibration). In a further aspect, a first calibration and a second calibration may be applied to raw sensor values acquired at a time point between the first calibration and the second calibration. The first and second calibrations may be applied to the raw sensor values by weighted averaging according to the proximity of the first and second calibrations to the acquisition time of the raw sensor value.
3 Citations
23 Claims
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1. A method comprising:
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performing, by a computing device, a calibration of an analyte sensor at a calibration time to produce a calibration factor; and applying, by the computing device, the calibration factor to raw sensor values measured by the analyte sensor within a back calibration interval prior to the calibration time to produce and/or modify calibrated sensor values from the raw sensor values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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performing, by a computing device, a first calibration of an analyte sensor to produce a first calibration factor; performing, by the computing device, a second calibration of the analyte sensor to produce a second calibration factor, the second calibration performed after the first calibration; and applying, by the computing device, the first calibration factor and the second calibration factor to a raw sensor value measured by the analyte sensor at a time point between the first and second calibration to produce and/or modify a calibrated sensor value for the time point. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A sensor system comprising:
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an analyte sensor configured to produce raw sensor values that depend on a concentration of an analyte in a body; a calibration module communicatively coupled to the analyte sensor and configured to receive the raw sensor values, the calibration module configured to; perform a calibration of the analyte sensor at a calibration time to produce a calibration factor; and apply the calibration factor to the raw sensor values produced by the analyte sensor within a back calibration interval prior to the calibration time to produce and/or modify calibrated sensor values from the raw sensor values. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification