Use of sensor redundancy to detect sensor failures
First Claim
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1. A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:
- applying a first bias potential to a first electrode implanted in the host;
receiving first sensor data from the first electrode, wherein the first sensor data are indicative of a property corresponding to the first electrode;
applying a second bias potential to a second electrode implanted in the host, wherein the first bias potential and the second bias potential are different;
receiving second sensor data from the second electrode, wherein the second sensor data are indicative of the property corresponding to the second electrode;
comparing, using a processor module, the property corresponding to the first electrode with the property corresponding to the second electrode; and
identifying a failure in at least one of the first electrode or the second electrode when a property magnitude of the first electrode is different from a property magnitude of the second electrode by a predetermined value.
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Abstract
Devices, systems, and methods for providing more accurate and reliable sensor data and for detecting sensor failures. Two or more electrodes can be used to generate data, and the data can be subsequently compared by a processing module. Alternatively, one sensor can be used, and the data processed by two parallel algorithms to provide redundancy. Sensor performance, including sensor failures, can be identified. The user or system can then respond appropriately to the information related to sensor performance or failure.
99 Citations
20 Claims
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1. A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:
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applying a first bias potential to a first electrode implanted in the host; receiving first sensor data from the first electrode, wherein the first sensor data are indicative of a property corresponding to the first electrode; applying a second bias potential to a second electrode implanted in the host, wherein the first bias potential and the second bias potential are different; receiving second sensor data from the second electrode, wherein the second sensor data are indicative of the property corresponding to the second electrode; comparing, using a processor module, the property corresponding to the first electrode with the property corresponding to the second electrode; and identifying a failure in at least one of the first electrode or the second electrode when a property magnitude of the first electrode is different from a property magnitude of the second electrode by a predetermined value. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:
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applying a first bias potential to a first electrode implanted in the host; receiving first sensor data over a time period from the first electrode, wherein the first sensor data are indicative of a property corresponding to the first electrode, wherein the property is at least one of sensor sensitivity or baseline; applying a second bias potential to a second electrode implanted in the host, wherein the first bias potential and the second bias potential are different; receiving second sensor data over the time period from the second electrode, wherein the second sensor data are indicative of the property corresponding to the second electrode; determining, using a processor module, over the time period a correlation between the property corresponding to the first electrode with the property corresponding to the second electrode; and identifying a failure in at least one of the first electrode or the second electrode when the correlation is less than a predetermined value.
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7. A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:
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applying a potential to a continuous analyte sensor implanted in the host; receiving sensor data over a time period from the continuous analyte sensor, the sensor data comprising at least one sensor data point, wherein the applying of the potential is at least in part during the time period; processing the at least one sensor data point to determine a first value associated with a first analyte concentration value, the first value determined using a first calculation; processing the at least one sensor data point to determine a second value associated with a second analyte concentration value, the second value determined using a second calculation different from the first calculation; comparing, using a processor module, the first value to the second value; identifying a sensor failure if a difference between the first value and the second value exceeds a predetermined amount; and responsive to identifying the sensor failure, triggering an alert indicating the sensor failure. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification