Method of Calibrating an Analyte-Measurement Device, and Associated Methods, Devices and Systems
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Abstract
The invention relates to a method for calibrating an analyte-measurement device that is used to evaluate a concentration of analyte in bodily fluid at or from a measurement site in a body. The method involves measuring a concentration, or calibration concentration, of an analyte in blood from an “off-finger” calibration site, and calibrating the analyte-measurement device based on that calibration concentration. The invention also relates to a device, system, or kit for measuring a concentration of an analyte in a body, which employs a calibration device for adjusting analyte concentration measured in bodily fluid based on an analyte concentration measured in blood from an “off-finger” calibration site.
25 Citations
21 Claims
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1. (canceled)
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2. A method for processing data from an analyte sensor, the method comprising:
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receiving, with an electronic system, sensor data from an analyte sensor, wherein the sensor data comprises at least one sensor data point; receiving, with the electronic system, reference data, wherein the reference data comprises at least one reference data point; matching, with the electronic system, a first reference data point to a substantially time corresponding first sensor data point to form a calibration set; forming, with the electronic system, a conversion function based at least in part on the calibration set, wherein the conversion function comprises a first non-zero baseline and a first analyte sensitivity; adjusting, with the electronic system, the conversion function using a second baseline determined at least in part by prior information; and determining, with the electronic system, an analyte output value in substantially real-time by applying the adjusted conversion function to a sensor data point. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for processing data from an analyte sensor, the system comprising:
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a first receiver module configured to receive sensor data from an analyte sensor, wherein the sensor data comprises at least one sensor data point; a second receiver module configured to receive reference data, wherein the reference data comprises at least one reference data point; and a processor module configured to; match a first reference data point to a substantially time corresponding first sensor data point to form a calibration set; form a conversion function based at least in part on the calibration set, wherein the conversion function comprises a first non-zero baseline and a first analyte sensitivity; adjust the conversion function using a second baseline determined at least in part by prior information; and determine an analyte output value in substantially real-time by applying the adjusted conversion function to a sensor data point. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system for processing data from an analyte sensor, the system comprising:
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means for receiving sensor data from an analyte sensor, wherein the sensor data comprises at least one sensor data point; means for receiving reference data, wherein the reference data comprises at least one reference data point; means for matching a first reference data point to a substantially time corresponding first sensor data point to form a calibration set; means for forming a conversion function based at least in part on the calibration set, wherein the conversion function comprises a first non-zero baseline and a first analyte sensitivity; means for adjusting the conversion function using a second baseline determined at least in part by prior information; and means for determining an analyte output value in substantially real-time by applying the adjusted conversion function to a sensor data point.
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Specification