Real time self-adjusting calibration algorithm
First Claim
1. A method for verifying the integrity of sensor data comprising:
- receiving a first data value from the sensor;
comparing a first parameter relating to the first data value to a first threshold value;
receiving a second data value from the sensor;
comparing a first parameter relating to the second data value to the first threshold value;
continuing receipt of data from the sensor when the first parameter relating to the first data value exceeds the first threshold value and the first parameter relating to the second data value does not exceed the first threshold value; and
terminating receipt of data from the sensor when the first parameter relating to the first data value and the first parameter relating to the second data value exceed the first threshold value.
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Accused Products
Abstract
A method of calibrating glucose monitor data includes collecting the glucose monitor data over a period of time at predetermined intervals. It also includes obtaining at least two reference glucose values from a reference source that temporally correspond with the glucose monitor data obtained at the predetermined intervals. Also included is calculating the calibration characteristics using the reference glucose values and corresponding glucose monitor data to regress the obtained glucose monitor data. And, calibrating the obtained glucose monitor data using the calibration characteristics is included. In preferred embodiments, the reference source is a blood glucose meter, and the at least two reference glucose values are obtained from blood tests. In additional embodiments, calculation of the calibration characteristics includes linear regression and, in particular embodiments, least squares linear regression. Alternatively, calculation of the calibration characteristics includes non-linear regression. Data integrity may be verified and the data may be filtered.
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Citations
61 Claims
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1. A method for verifying the integrity of sensor data comprising:
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receiving a first data value from the sensor;
comparing a first parameter relating to the first data value to a first threshold value;
receiving a second data value from the sensor;
comparing a first parameter relating to the second data value to the first threshold value;
continuing receipt of data from the sensor when the first parameter relating to the first data value exceeds the first threshold value and the first parameter relating to the second data value does not exceed the first threshold value; and
terminating receipt of data from the sensor when the first parameter relating to the first data value and the first parameter relating to the second data value exceed the first threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for filtering data from a sensor comprising:
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receiving a plurality of data values from the sensor;
obtaining a quantifier of a variance of a measurement error associated with the plurality of data values; and
filtering the plurality of data values with an adaptive filter, wherein the quantifier is an input to the adaptive filter. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for calibrating a sensor comprising:
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receiving a plurality of data values from the sensor;
determining the reliability of each data value of the plurality of data values;
discarding data values of the plurality of data values that are unreliable;
filtering the data values of the plurality of data that have not been discarded; and
adjusting an output of the sensor using the filtered data values. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An apparatus for verifying the integrity of sensor data comprising:
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means for receiving a first data value from the sensor;
means for comparing a first parameter relating to the first data value to a first threshold value;
means for receiving a second data value from the sensor;
means for comparing a first parameter relating to the second data value to the first threshold value;
means for continuing receipt of data from the sensor when the first parameter relating to the first data value exceeds the first threshold value and the first parameter relating to the second data value does not exceed the first threshold value; and
means for terminating receipt of data from the sensor when the first parameter relating to the first data value and the first parameter relating to the second data value exceed the first threshold value. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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50. An apparatus for filtering data from a sensor comprising:
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means for receiving a plurality of data values from the sensor;
means for obtaining a quantifier of a variance of a measurement error associated with the plurality of data values; and
means for filtering the plurality of data values with an adaptive filter, wherein the quantifier is an input to the adaptive filter. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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57. An apparatus for calibrating a sensor comprising:
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means for receiving a plurality of data values from the sensor;
means for determining the reliability of each data value of the plurality of data values;
means for discarding data values of the plurality of data values that are unreliable;
means for filtering the data values of the plurality of data that have not been discarded; and
adjusting an output of the sensor using the filtered data values. - View Dependent Claims (58, 59, 60, 61)
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Specification