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 current representative of a 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 data stream from the glucose sensor output current;
detecting a signal artifact by examining the data stream for high frequency content cycles above a predetermined threshold; and
generating at least one estimated data stream or data stream portion to reduce or replace the detected signal artifact.
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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.
569 Citations
19 Claims
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1. In a glucose sensing system comprising a glucose sensor configured for producing an output current representative of a 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 data stream from the glucose sensor output current; detecting a signal artifact by examining the data stream for high frequency content cycles above a predetermined threshold; and generating at least one estimated data stream or data stream portion to reduce or replace the detected signal artifact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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 comprising current representative of glucose concentration in a host; a signal artifact detection module configured to detect a signal artifact by examining the data stream for high frequency content cycles above a predetermined threshold; and a signal estimation module configured to generate an estimated data stream or data stream portion to reduce or replace the signal artifact. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification