Systems and methods for replacing signal artifacts in a glucose sensor data stream
First Claim
1. In a glucose sensing system comprising a glucose sensor configured for producing an output representative of glucose concentration in a host and processing circuitry configured to process the output, a method for processing data from the output, the method comprising:
- generating a glucose sensor data point from the glucose sensor output;
detecting a signal loss associated with the glucose sensor data point;
filtering the glucose sensor data point with a filter whereby a filtered glucose sensor data point is generated; and
adjusting, using a processor, the filtered glucose sensor data point to reduce effects associated with the signal loss.
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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.
586 Citations
17 Claims
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1. In a glucose sensing system comprising a glucose sensor configured for producing an output representative of glucose concentration in a host and processing circuitry configured to process the output, a method for processing data from the output, the method comprising:
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generating a glucose sensor data point from the glucose sensor output; detecting a signal loss associated with the glucose sensor data point; filtering the glucose sensor data point with a filter whereby a filtered glucose sensor data point is generated; and adjusting, using a processor, the filtered glucose sensor data point to reduce effects associated with the signal loss. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A glucose sensor system for monitoring a glucose concentration in a host, the system comprising:
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a continuous glucose sensor configured to produce a data stream; and a processor configured to receive the data stream, wherein the processor is configured to generate an estimated data stream based at least in part on applying the data stream to a recursive filter and adjusting the filtered data stream to reduce effects associated with a signal loss. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification