Sensor fault detection using analyte sensor data pattern comparison

  • US 10,076,285 B2
  • Filed: 03/13/2014
  • Issued: 09/18/2018
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A computer-implemented method, comprising:

  • storing a baseline data point in a memory wherein the baseline data point is representative of a first point on a glucose control grid;

    storing an evaluation data point in the memory wherein the evaluation data point is representative of a second point on the glucose control grid;

    computing a magnitude of a vector that would extend between the baseline data point and the evaluation data point if plotted on the glucose control grid;

    defining a gradient function over an area of the glucose control grid and determining gradient contour lines around the baseline data point and the evaluation data point;

    computing a component of the magnitude of the vector between the baseline data point and the evaluation data point that is parallel to a contour line of the defined gradient function;

    comparing the component of the magnitude of the vector to a first predefined threshold value;

    displaying, on a system display, an indication that a sensor fault has been detected if the component of the magnitude of the vector is greater than the first predefined threshold value; and

    displaying, on the system display, an indication that the sensor fault has not been detected if the component of the magnitude of the vector is less than the first predefined threshold value.

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