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    • 3. 发明申请
    • SYSTEMS AND METHODS FOR MODIFIED PULSE TRANSIT TIME MEASUREMENT
    • 用于修改的脉冲过渡时间测量的系统和方法
    • WO2017147609A1
    • 2017-08-31
    • PCT/US2017/019775
    • 2017-02-27
    • ECHO LABS, INC.
    • FERBER, EladNARAYANAN, RamkrishnanGUNGOR, Derya Gol
    • A61B5/02
    • A61B5/02108A61B5/02125A61B5/681A61B5/7257A61B2562/043
    • A wearable apparatus selects at least two signal channels corresponding to an arterial signal, the channels associated with corresponding optical sensors of the wearable apparatus. Data is obtained from signal channels over a predetermined time. A function is applied to the data to transform the data to a frequency domain. Phase values are determined for frequency components of the data in the frequency domain. A phase difference value is determined between the phase values. A time shift value is determined between the data based on the phase difference value. A modified pulse transmit time is determined, based on the time shift value, representing a transit time for a pressure wavefront to travel between optical sensors. A pulse wave velocity is determined based on the modified pulse transit time. A blood pressure value is calculated based on the pulse wave velocity. A message is provided based on the blood pressure value.
    • 可穿戴设备选择对应于动脉信号的至少两个信道,所述信道与可穿戴设备的相应光学传感器相关联。 数据是在预定时间内从信道获得的。 将数据应用于数据以将数据转换到频域。 相位值是针对频域中的数据的频率分量确定的。 在相位值之间确定相位差值。 在基于相位差值的数据之间确定时移值。 基于时移值确定修改的脉冲发射时间,其表示压力波阵面在光学传感器之间传播的渡越时间。 基于修改的脉冲传播时间来确定脉搏波速度。 根据脉搏波速度计算血压值。 根据血压值提供消息。