Systems and methods for replacing signal artifacts in a glucose sensor data stream
First Claim
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1. A method of analyzing data from an analyte sensor using a continuous analyte monitoring system, comprising:
- receiving data from an analyte sensor, the data comprising at least one sensor data point;
filtering the received data to generate filtered data;
comparing the received data with the filtered data to obtain at least one residual;
determining a first signal artifact event has occurred when the at least one residual is exceeds a first threshold value;
determining a second signal artifact event has occurred when the at least one residual exceeds a second, different threshold value;
disabling or enabling display of a first graphical representation of the received data based on the determination that the first signal artifact has occurred, wherein the first graphical representation is selected from a group consisting of a graphical indication of glucose trend, a numerical estimated analyte value, and a range of glucose values; and
disabling or enabling display of a second graphical representation of the received data based on the determination that the second signal artifact has occurred,wherein the second graphical representation is selected from the group consisting of the graphical indication of glucose trend, the numerical estimated analyte value, and the range of glucose values,wherein the selected second graphical representation is different than the selected first graphical representation, andwherein the selected second graphical representation is according to the second threshold value that is higher than the first threshold value, and corresponds to the second signal artifact event that indicates a higher severity than the first signal artifact event.
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Abstract
Systems and methods for minimizing or eliminating transient non-glucose related signal noise due to non-glucose rate limiting phenomenon such as interfering species, ischemia, pH changes, temperatures changes, known or unknown sources of mechanical, electrical and/or biochemical noise, and the like. The system monitors a data stream from a glucose sensor and detects signal artifacts that have higher amplitude than electronic or diffusion-related system noise. The system processes some or the entire data stream continually or intermittently based at least in part on whether the signal artifact event has occurred.
759 Citations
32 Claims
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1. A method of analyzing data from an analyte sensor using a continuous analyte monitoring system, comprising:
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receiving data from an analyte sensor, the data comprising at least one sensor data point; filtering the received data to generate filtered data; comparing the received data with the filtered data to obtain at least one residual; determining a first signal artifact event has occurred when the at least one residual is exceeds a first threshold value; determining a second signal artifact event has occurred when the at least one residual exceeds a second, different threshold value; disabling or enabling display of a first graphical representation of the received data based on the determination that the first signal artifact has occurred, wherein the first graphical representation is selected from a group consisting of a graphical indication of glucose trend, a numerical estimated analyte value, and a range of glucose values; and disabling or enabling display of a second graphical representation of the received data based on the determination that the second signal artifact has occurred, wherein the second graphical representation is selected from the group consisting of the graphical indication of glucose trend, the numerical estimated analyte value, and the range of glucose values, wherein the selected second graphical representation is different than the selected first graphical representation, and wherein the selected second graphical representation is according to the second threshold value that is higher than the first threshold value, and corresponds to the second signal artifact event that indicates a higher severity than the first signal artifact event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A continuous analyte monitoring system configured to process data from an analyte sensor, the continuous analyte monitoring system comprising:
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a data receiving module configured to receive sensor data from the analyte sensor, the data comprising at least one sensor data point; a signal artifacts module configured to filter the received data to generate filtered data, compare the received data with the filtered data to obtain at least one residual, and determine a first signal artifact event has occurred when the at least one residual is exceeds a first threshold value and to determine a second signal artifact event has occurred when the at least one residual exceeds a second, different threshold value; a processor module configured to disable or enable display of a first graphical representation of the received data based on the determination that the first signal artifact has occurred, wherein the first graphical representation is selected from a group consisting of a graphical indication of glucose trend, a numerical estimated analyte value, and a range of glucose values, and configured to disable or enable display of a second graphical representation of the received data based on the further determination that the second signal artifact has occurred, wherein the second graphical representation is selected from the group consisting of the graphical indication of glucose trend, the numerical estimated analyte value, and the range of glucose values, wherein the selected second graphical representation is different than the selected first graphical representation, and wherein the selected second graphical representation is according to the second threshold value that is higher than the first threshold value, and corresponds to the second signal artifact event that indicates a higher severity than the first signal artifact event. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification