Systems and methods for replacing signal artifacts in a glucose sensor data stream
First Claim
1. A method for detecting an oxygen deficiency in a continuous glucose sensor, the method comprising:
- receiving sensor data generated by a continuous glucose sensor during a first time period, wherein the continuous glucose sensor is configured to measure a glucose concentration in a subcutaneous tissue of a host;
identifying, using a processor module, an oxygen deficiency associated with the continuous glucose sensor based on an evaluation of the sensor data for the first time period; and
processing the sensor data, using the processor module, responsive to the identification of the oxygen deficiency.
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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 ischemia, pH changes, temperatures changes, 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 replaces some or the entire data stream continually or intermittently including signal estimation methods that particularly address transient signal artifacts. The system is also capable of detecting the severity of the signal artifacts and selectively applying one or more signal estimation algorithm factors responsive to the severity of the signal artifacts, which includes selectively applying distinct sets of parameters to a signal estimation algorithm or selectively applying distinct signal estimation algorithms.
629 Citations
37 Claims
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1. A method for detecting an oxygen deficiency in a continuous glucose sensor, the method comprising:
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receiving sensor data generated by a continuous glucose sensor during a first time period, wherein the continuous glucose sensor is configured to measure a glucose concentration in a subcutaneous tissue of a host; identifying, using a processor module, an oxygen deficiency associated with the continuous glucose sensor based on an evaluation of the sensor data for the first time period; and processing the sensor data, using the processor module, responsive to the identification of the oxygen deficiency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for detecting an oxygen deficiency in a continuous glucose sensor, the method comprising:
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receiving sensor data generated by a continuous glucose sensor during a first time period, wherein the continuous glucose sensor is configured to measure a glucose concentration in a subcutaneous tissue of a host; evaluating, using a processor module, the sensor data for the first time period; and detecting, using the processor module, signal artifacts associated with an oxygen deficiency based on the evaluation of the sensor data for the first time period; wherein evaluating the sensor data for the first time period comprises evaluating a frequency content of the sensor data, and wherein evaluating the frequency content comprises performing an orthogonal transform.
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20. A system for detecting oxygen deficiencies in a continuous glucose sensor, the system comprising:
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a continuous glucose sensor configured to produce sensor data during a first time period, wherein the continuous glucose sensor is configured to measure a glucose concentration in a subcutaneous tissue of a host; and a processor module configured to identify an oxygen deficiency associated with the continuous glucose sensor based on an evaluation of the sensor data for the first time period and process the sensor data responsive to the identification of the oxygen deficiency. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for detecting an oxygen deficiency in a continuous glucose sensor, the method comprising:
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receiving sensor data generated by a continuous glucose sensor during a first time period, wherein the continuous glucose sensor is configured to measure a glucose concentration in a subcutaneous tissue of a host; identifying, using a processor module, an oxygen deficiency associated with the continuous glucose sensor, wherein the identifying comprises monitoring a counter electrode of the continuous glucose sensor for an indication that insufficient oxygen is available; and processing the sensor data, using the processor module, responsive to the identification of the oxygen deficiency. - View Dependent Claims (35, 36, 37)
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Specification