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    SYSTEMS, DEVICES, AND METHODS FOR MEASURING BLOOD PRESSURE OF A USER
    1.
    发明申请
    SYSTEMS, DEVICES, AND METHODS FOR MEASURING BLOOD PRESSURE OF A USER 审中-公开

    公开(公告)号：US20170360306A1

    公开(公告)日：2017-12-21

    申请号：US15507659

    申请日：2015-09-08

    Applicant: Apple, Inc.

    Inventor： Ravi Narasimhan ,  Zijing Zeng ,  Richard C. Kimoto ,  Erno Klaassen ,  Thomas J. Sullivan ,  Derek Park-Shing Young ,  Todd K. Whitehurst

    IPC: A61B5/022 ,  A61B5/021 ,  A61B5/00

    Abstract: The present invention generally relates to blood pressure monitoring. In some embodiments, methods and devices of measuring a mean arterial pressure are provided and/or monitoring blood pressure changes. A wrist-worn device may include a plurality of sensors backed by a plurality of actuators. Subsets of the plurality of sensors may be selectively actuateable against a wrist of a user using one or more of the plurality of actuators. A preferred sensor and location may be identified based on pressure signals received from each of the sensors. In some embodiments, devices may use a fluid bladder coupled with piezoelectric film sensors. A fluid bladder pressure sensor may be used to calibrate the piezoelectric film signal to provide a static and dynamic pressure reading. In yet another embodiment, a mean arterial pressure may be calculated by processing a swept pressure signal obtained as a sensor is swept through different heights.

    On-Bed Differential Piezoelectric Sensor
    2.
    发明申请
    On-Bed Differential Piezoelectric Sensor 有权

    公开(公告)号：US20210041287A1

    公开(公告)日：2021-02-11

    申请号：US16930125

    申请日：2020-07-15

    Applicant: Apple Inc.

    Inventor： Henry Rimminen ,  Ali M. Amin ,  Timothy L. Weadon ,  Yindar Chuo ,  Zijing Zeng ,  Erno Klaassen

    IPC: G01H11/08 ,  A61B5/00 ,  H01L41/047 ,  H01L41/113 ,  A61B5/08 ,  A61B5/0205

    Abstract: A sensor system includes a sensor stack, a differential amplifier, an analog-to-digital converter, and a processor. The sensor stack includes a piezoelectric material having a first side opposing a second side, a first electrode connected to the first side, and a second electrode connected to the second side. The differential amplifier is coupled to the first and second electrodes and is configured to generate a differential output indicative of vibrations sensed by the piezoelectric material. The analog-to-differential converter is configured to digitize the differential output. The processor is configured to identify a type of biological vibration included in the digitized differential output.

    Wrist worn accelerometer for pulse transit time (PTT) measurements of blood pressure
    7.
    发明授权
    Wrist worn accelerometer for pulse transit time (PTT) measurements of blood pressure 有权

    公开(公告)号：US10517489B2

    公开(公告)日：2019-12-31

    申请号：US15507607

    申请日：2015-09-08

    Applicant: Apple Inc.

    Inventor： Ravi Narasimhan ,  Richard C. Kimoto ,  Thomas J. Sullivan ,  Todd K. Whitehurst ,  Derek Park-shing Young ,  Zijing Zeng ,  Erno Klaassen

    IPC: A61B5/021 ,  A61B5/11 ,  A61B5/00 ,  A61B5/024

    Abstract: Wrist-worn devices and related methods measure a pulse transit time non-invasively and calculate a blood pressure value using the pulse transit time. A wrist-worn device includes an accelerometer, a photo-lethysmogram (PPG) or a pulse pressure sensor, and a controller. The PPG or the pulse pressure sensor coupled to the wrist-worn device for detecting an arrival of a blood pressure pulse at the user's wrist. The controller is configured to process output signals from the accelerometer to detect when the blood pressure pulse is propagated from the left ventricle of the user's heart, process a signal from the PPG or the pulse pressure sensor to detect when the blood pressure pulse arrives at the wrist, calculate a pulse transit time (PTT) for propagation of the blood pressure pulse from the left ventricle to the wrist, and generate one or more blood pressure values for the user based on the PTT.

    Systems, devices, and methods for measuring blood pressure of a user
    8.
    发明授权
    Systems, devices, and methods for measuring blood pressure of a user 有权

    公开(公告)号：US10702171B2

    公开(公告)日：2020-07-07

    申请号：US15507659

    申请日：2015-09-08

    Applicant: Apple Inc.

    Inventor： Ravi Narasimhan ,  Zijing Zeng ,  Richard C. Kimoto ,  Erno Klaassen ,  Thomas J. Sullivan ,  Derek Park-Shing Young ,  Todd K. Whitehurst

    IPC: A61B5/022 ,  A61B5/00 ,  A61B5/021

    Abstract: The present invention generally relates to blood pressure monitoring. In some embodiments, methods and devices of measuring a mean arterial pressure are provided and/or monitoring blood pressure changes. A wrist-worn device may include a plurality of sensors backed by a plurality of actuators. Subsets of the plurality of sensors may be selectively actuateable against a wrist of a user using one or more of the plurality of actuators. A preferred sensor and location may be identified based on pressure signals received from each of the sensors. In some embodiments, devices may use a fluid bladder coupled with piezoelectric film sensors. A fluid bladder pressure sensor may be used to calibrate the piezoelectric film signal to provide a static and dynamic pressure reading. In yet another embodiment, a mean arterial pressure may be calculated by processing a swept pressure signal obtained as a sensor is swept through different heights.

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