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Methods and Systems for Improving the Reliability of Orthogonally Redundant Sensors
专利权人:
MEDTRONIC MINIMED; INC.
发明人:
ANDREA VARSAVSKY,XIAOLONG LI,MIKE C. LIU,YUXIANG ZHONG,NING YANG
申请号:
US16522376
公开号:
US20190357820A1
申请日:
2019.07.25
申请国别(地区):
US
年份:
2019
代理人:
摘要:
Methods and systems for sensor calibration and sensor glucose (SG) fusion are used advantageously to improve the accuracy and reliability of orthogonally redundant glucose sensor devices, which may include optical and electrochemical glucose sensors. Calibration for both sensors may be achieved via fixed-offset and/or dynamic regression methodologies, depending, e.g., on sensor stability and Isig-Ratio pair correlation. For SG fusion, respective integrity checks may be performed for SG values from the optical and electrochemical sensors, and the SG values calibrated if the integrity checks are passed. Integrity checks may include checking for sensitivity loss, noise, and drift. If the integrity checks are failed, in-line sensor mapping between the electrochemical and optical sensors may be performed prior to calibration. The electrochemical and optical SG values may be weighted (as a function of the respective sensor's overall reliability index (RI)) and the weighted SGs combined to obtain a single, fused SG value.
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