Transcutaneous analyte sensors and monitors, calibration thereof, and associated methods
First Claim
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1. A method of calibrating an analyte concentration sensor within a biological system, using only a signal from the analyte concentration sensor, wherein at a first repeatable event, the analyte concentration value within the biological system is known, comprising:
- on a monitoring device, detecting when an analyte concentration value as measured by an analyte concentration sensor indwelling in a biological system constitutes a first repeatable event; and
on the monitoring device or on a device or server operatively coupled to the monitoring device, correlating a measurement of the analyte concentration value when the biological system is at the detected first repeatable event to the known analyte concentration value, wherein the correlating includes determining a functional relationship between the sensor reading and the known analyte concentration value, wherein the functional relationship includes a multiplicative constant, wherein the first repeatable event is selected from the group consisting of a steady-state, a post prandial rise, a daily high-low glucose spread, a decay rate, and a rate of change.
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Abstract
Systems and methods are provided to calibrate an analyte concentration sensor within a biological system, generally using only a signal from the analyte concentration sensor. For example, at a steady state, the analyte concentration value within the biological system is known, and the same may provide a source for calibration. Similar techniques may be employed with slow-moving averages. Variations are disclosed.
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22 Claims
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1. A method of calibrating an analyte concentration sensor within a biological system, using only a signal from the analyte concentration sensor, wherein at a first repeatable event, the analyte concentration value within the biological system is known, comprising:
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on a monitoring device, detecting when an analyte concentration value as measured by an analyte concentration sensor indwelling in a biological system constitutes a first repeatable event; and on the monitoring device or on a device or server operatively coupled to the monitoring device, correlating a measurement of the analyte concentration value when the biological system is at the detected first repeatable event to the known analyte concentration value, wherein the correlating includes determining a functional relationship between the sensor reading and the known analyte concentration value, wherein the functional relationship includes a multiplicative constant, wherein the first repeatable event is selected from the group consisting of a steady-state, a post prandial rise, a daily high-low glucose spread, a decay rate, and a rate of change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An analyte sensor system, comprising:
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an analyte concentration sensor configured for use within a biological system, wherein the analyte concentration sensor is configured to be calibrated using only a signal from the analyte concentration sensor, wherein at a steady state the analyte concentration value within the biological system is known; a monitoring device, wherein the monitoring device is configured to detect when an analyte concentration value as measured by the analyte concentration sensor indwelling in a biological system constitutes a first repeatable event; and a processor, wherein the processor is a component of the monitoring device or of a device or a server operatively coupled to the monitoring device, wherein the processor is configured to correlate a measurement of the analyte concentration value when the biological system is at the detected first repeatable event to the known analyte concentration value, wherein the correlating includes determining a functional relationship between the sensor reading and the known analyte concentration value, wherein the functional relationship includes a multiplicative constant, wherein the first repeatable event is selected from the group consisting of a steady-state, a post prandial rise, a daily high-low glucose spread, a decay rate, and a rate of change. - View Dependent Claims (20, 21, 22)
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Specification