End of life detection for analyte sensors
First Claim
1. A system for determining end of life of a continuous analyte sensor, the system comprising sensor electronics configured to be operably connected to a continuous analyte sensor, the sensor electronics configured to:
- evaluate a rate of change of sensor sensitivity factor associated with end of life symptoms of the continuous analyte sensor, wherein the rate of change of sensor sensitivity factor is based at least in part on a skew moving average of uncalibrated sensor data;
determine an end of life status of the continuous analyte sensor by comparing the evaluated rate of change of sensor sensitivity factor to a rate of change threshold; and
provide an output related to the end of life status of the continuous analyte sensor, wherein the sensor electronics are configured to provide the output by disabling display of sensor data.
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Abstract
Systems and methods for processing sensor data and end of life detection are provided. In some embodiments, a method for determining the end of life of a continuous analyte sensor includes evaluating a plurality of risk factors using an end of life function to determine an end of life status of the sensor and providing an output related to the end of life status of the sensor. The plurality of risk factors may be selected from the list including the number of days the sensor has been in use, whether there has been a decrease in signal sensitivity, whether there is a predetermined noise pattern, whether there is a predetermined oxygen concentration pattern, and error between reference BG values and EGV sensor values.
39 Citations
19 Claims
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1. A system for determining end of life of a continuous analyte sensor, the system comprising sensor electronics configured to be operably connected to a continuous analyte sensor, the sensor electronics configured to:
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evaluate a rate of change of sensor sensitivity factor associated with end of life symptoms of the continuous analyte sensor, wherein the rate of change of sensor sensitivity factor is based at least in part on a skew moving average of uncalibrated sensor data; determine an end of life status of the continuous analyte sensor by comparing the evaluated rate of change of sensor sensitivity factor to a rate of change threshold; and provide an output related to the end of life status of the continuous analyte sensor, wherein the sensor electronics are configured to provide the output by disabling display of sensor data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining end of life of a continuous analyte sensor, comprising:
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evaluating a rate of change of sensor sensitivity factor associated with end of life symptoms of a continuous analyte sensor, wherein the rate of change of sensor sensitivity factor is based at least in part on a moving average of uncalibrated sensor data; determining an end of life status of the continuous analyte sensor by comparing the evaluated rate of change of sensor sensitivity factor to a rate of change threshold; and providing an output related to the end of life status of the continuous analyte sensor, wherein the providing the output comprises disabling display of sensor data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification