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    • 5. 发明申请
    • BODY-WORN MONITOR FOR MEASURING RESPIRATION RATE
    • 身体监视器用于测量呼吸率
    • WO2011032132A2
    • 2011-03-17
    • PCT/US2010048729
    • 2010-09-14
    • SOTERA WIRELESS INCMCCOMBIE DEVINDHILLON MARSHALBANET MATT
    • MCCOMBIE DEVINDHILLON MARSHALBANET MATT
    • A61B5/0205
    • A61B5/0816A61B5/0002A61B5/0205A61B5/02416A61B5/0402A61B5/0535A61B5/0809A61B5/1116A61B5/1118A61B5/113A61B5/681A61B5/6823A61B5/6824A61B5/6826A61B5/721A61B5/7239A61B5/746A61B2562/0219
    • The invention provides a multi-sensor system that uses an algorithm based on adaptive filtering to monitor a patient's respiratory rate. The system features a first sensor selected from the following group: i) an impedance pneumography sensor featuring at least two electrodes and a processing circuit configured to measure an impedance pneumography signal; ii) an ECG sensor featuring at least two electrodes and an ECG processing circuit configured to measure an ECG signal; and iii) a PPG sensor featuring a light source, photodetector, and PPG processing circuit configured to measure a PPG signal. Each of these sensors measures a time-dependent signal which is sensitive to respiratory rate and, during operation, is processed to determine an initial respiratory rate value. An adaptive digital filter is determined from the initial respiratory rate. The system features a second sensor (e.g. a digital 3-axis accelerometer) that attaches to the patient's torso and measures an ACC signal indicating movement of the chest or abdomen that is also sensitive to respiratory rate. This second signal is processed with the adaptive filter to determine a final value for respiratory rate.
    • 本发明提供一种多传感器系统,其使用基于自适应滤波的算法来监测患者的呼吸频率。 所述系统具有选自以下组的第一传感器:i)具有至少两个电极的阻抗气象传感器和被配置为测量阻抗气象信号的处理电路; ii)具有至少两个电极的ECG传感器和被配置成测量ECG信号的ECG处理电路; 以及iii)PPG传感器,其具有被配置为测量PPG信号的光源,光电检测器和PPG处理电路。 这些传感器中的每一个测量对呼吸频率敏感的时间依赖性信号,并且在操作期间被处理以确定初始呼吸率值。 根据初始呼吸频率确定自适应数字滤波器。 该系统具有附接到患者躯干的第二传感器(例如,数字3轴加速度计),并测量ACC信号,该ACC信号指示对呼吸频率敏感的胸部或腹部的运动。 该第二信号用自适应滤波器处理以确定呼吸频率的最终值。