公开(公告)号：US20220322976A1

公开(公告)日：2022-10-13

申请号：US17708892

申请日：2022-03-30

申请人： DexCom, Inc.

发明人： Shwetha R. Edla ,  Rasoul Yousefi ,  Neda Ehtiati ,  Ghazaleh R. Esmaili

IPC分类号： A61B5/145 ,  A61B5/00

摘要： In accordance with a system and/or method for monitoring an analyte concentration, a sensor signal indicative of an analyte concentration in a host may be received from an analyte sensor. The sensor signal may be filtered using a Kalman filter having process noise with a process covariance and measurement noise with a measurement covariance. The filtering may include updating a value associated with at least one of the process covariance and the measurement covariance using a value associated with one or more parameters employed in a model of the Kalman filter. A filtered sensor signal representative of the analyte concentration in the host may be output from the Kalman filter.

公开(公告)号：US20230181065A1

公开(公告)日：2023-06-15

申请号：US18065390

申请日：2022-12-13

申请人： Dexcom, Inc.

发明人： Arturo Garcia ,  Stephen J. Vanslyke ,  Apurv U. Kamath ,  Liang Wang ,  Ghazaleh R. Esmaili ,  Alexandra E. Constantin ,  Daiting Rong ,  Rasoul Yousefi ,  Neda Ehtiati ,  Robert Michael Naggs ,  Yuxi Zhang

IPC分类号： A61B5/145 ,  A61B5/00

CPC分类号： A61B5/14532 ,  A61B5/7203 ,  A61B5/725 ,  A61B5/7221 ,  A61B2560/0276 ,  A61B5/742

摘要： Systems and methods for processing sensor data and end-of-life detection are provided. In some embodiments, a method for determining the end-of-life of a continuous analyte sensor includes receiving a sensor signal from an analyte sensor. A plurality of risk factors associated with end-of-life symptoms of analyte sensors is evaluated. The risk factors include a downward drift in sensor sensitivity over time, an amount of non-symmetrical, non-stationary noise and a duration of noise. An end-of-life status of the analyte sensor is determined based at least in part on the evaluating. An output related to the end-of-life status of the analyte sensor is provided.