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:
- receiving first sensor data from a first electrode implanted in the host, wherein the first sensor data are indicative of a property corresponding to the first electrode;
receiving second sensor data from a second electrode implanted in the host, wherein the second sensor data are indicative of the property corresponding to the second electrode, the first electrode and the second electrode having substantially same characteristics;
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.
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Citations
21 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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receiving first sensor data from a first electrode implanted in the host, wherein the first sensor data are indicative of a property corresponding to the first electrode; receiving second sensor data from a second electrode implanted in the host, wherein the second sensor data are indicative of the property corresponding to the second electrode, the first electrode and the second electrode having substantially same characteristics; 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, 6)
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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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receiving first sensor data over a time period from a first electrode implanted in the host, wherein the first sensor data are indicative of a property corresponding to the first electrode; receiving second sensor data over the time period from a second electrode implanted in the host, wherein the second sensor data are indicative of the property corresponding to the second electrode, the first and second electrodes having substantially same characteristics; 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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8. A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:
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receiving first sensor data over a time period from a first electrode implanted in the host, wherein the first sensor data are indicative of a first property and a second property corresponding to the first electrode; receiving second sensor data over the time period from a second electrode implanted in the host, wherein the second sensor data are indicative of the first property and the second property corresponding to the second electrode, the first and second electrodes having substantially same characteristics; determining, using a processor module, a value that is representative at least in part of differences in the first and second properties between the first electrode and the second electrode over the time period; and responding to the determination of the value when the value exceeds a predetermined threshold by at least one of deactivating a continuous analyte monitoring system, displaying an alert, instructing a user to remove a sensor comprising the first electrode and the second electrode from the host, or instructing a user to insert a new sensor comprising a new first electrode and a new second electrode in the host.
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9. A method for detecting a sensor failure in a continuous analyte monitoring system implanted in a host, the method comprising:
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receiving sensor data over a time period from a continuous analyte sensor implanted in the host, the sensor data comprising at least one sensor data point; processing the at least one sensor data point using a first algorithm to determine a first analyte concentration value; processing the at least one sensor data point using a second algorithm to determine a second analyte concentration value, wherein the first algorithm is different from the second algorithm; comparing, using a processor module, the first analyte concentration value to the second analyte concentration value; and identifying a sensor failure if a difference between the first analyte concentration value and the second analyte concentration value exceeds a predetermined amount.
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10. A continuous analyte monitoring system, the system comprising:
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an electrochemical analyte sensor configured to be implanted in a host and to generate a first signal indicative of a first concentration value of a first analyte in the host; a fiber optic sensor configured to be implanted in the host and to generate a second signal indicative of a second concentration value of a second analyte in the host; and a processor configured to evaluate the first concentration value and the second concentration value to determine a third concentration value. - View Dependent Claims (11, 12, 13, 14)
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15. A continuous analyte monitoring system configured for detecting a sensor failure when implanted in a host, the system comprising:
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a first electrode configured to receive first sensor data when implanted in a host, wherein the first sensor data are indicative of a property corresponding to the first electrode; a second electrode having substantially same characteristics as the first electrode and configured to receive second sensor data when implanted in a host, wherein the second sensor data are indicative of a property corresponding to the second electrode; and a processor module configured to compare the property corresponding to the first electrode with the property corresponding to the second electrode and to identify 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 (16, 17, 18, 19, 20, 21)
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Specification