Use of multiple data points and filtering in an analyte sensor
First Claim
1. A method of calibrating a biosensor that measures an analyte, comprising:
- obtaining, by a computing device, a plurality of biosensor output signal values during a plurality of intervals;
determining, by the computing device, a median interval sensor output value for each of the plurality of intervals;
applying, by the computing device, a median filter to the median interval sensor output values to obtain a sensor output value representing a median value of the median interval sensor output values;
comparing, by the computing device, a blood analyte concentration with the sensor output value to obtain a sensor sensitivity value; and
utilizing, by the computing device, the sensor sensitivity value to calibrate signal output of the biosensor.
8 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the present invention improve the accuracy of measurements and/or in vivo calibrations of a biosensor by (1) using more than one sensor signal value and/or more than one directly sampled and measured value, such as a capillary blood glucose value, and/or by (2) delaying the acquisition of a sensor output value that is compared with a directly sampled and measured value, such as a capillary blood glucose value, during a calibration. In an embodiment of the present invention, the median of a series of measured values, or a median or mean of the medians, may be utilized to provide more consistent and accurate measurement data and/or to compensate for error or artifact.
163 Citations
18 Claims
-
1. A method of calibrating a biosensor that measures an analyte, comprising:
-
obtaining, by a computing device, a plurality of biosensor output signal values during a plurality of intervals; determining, by the computing device, a median interval sensor output value for each of the plurality of intervals; applying, by the computing device, a median filter to the median interval sensor output values to obtain a sensor output value representing a median value of the median interval sensor output values; comparing, by the computing device, a blood analyte concentration with the sensor output value to obtain a sensor sensitivity value; and utilizing, by the computing device, the sensor sensitivity value to calibrate signal output of the biosensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of sensing an analyte using a biosensor, comprising:
-
obtaining, by a computing device, a plurality of biosensor output signal values during a plurality of intervals; determining, by the computing device, a median interval sensor output value for each of the plurality of intervals; applying, by the computing device, a median filter to the median interval sensor output values to obtain a sensor output value representing a median value of the median interval sensor output values; and displaying the sensor output value on an electronic monitoring unit coupled to the biosensor. - View Dependent Claims (15, 16, 17, 18)
-
Specification