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    Fetal heart rate extraction from maternal abdominal ECG recordings
    2.
    发明授权
    Fetal heart rate extraction from maternal abdominal ECG recordings 有权

    公开(公告)号：US11337616B2

    公开(公告)日：2022-05-24

    申请号：US16577425

    申请日：2019-09-20

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Limei Cheng ,  Eric Thomas Carlson ,  Srinivasan Vairavan ,  Minnan Xu

    IPC: A61B5/02 ,  A61B5/024 ,  A61B5/0255 ,  A61B5/00 ,  A61B5/316 ,  A61B5/344 ,  A61B5/352 ,  A61B5/366 ,  A61B5/327 ,  A61B5/364

    Abstract: System (10) for extracting a fetal heart rate from at least one maternal signal using a computer processor (26). The system includes sensors (12-18) attached to a patient to receive abdominal ECG signals and a recorder and digitizer (20) to record and digitize each at least one maternal signal in a maternal signal buffer (22A-22D). The system further includes a peak detector (40) to identify candidate peaks in the maternal signal buffer. The signal stacker (42) of the system stacks the divides at least one maternal signal buffer into a plurality of snippets, each snippet including one candidate peak and a spatial filter (44) to identify and attenuate a maternal QRS signal in the plurality of snippets of the maternal signal buffer, the spatial filter including at least one of principal component analysis and orthogonal projection, to produce a raw fetal ECG signal which is stored in a raw fetal ECG buffer. The system further includes a fetal QRS identifier (46) for identifying peaks in the raw fetal ECG buffer by at least one of principal component analysis and a peak-detector followed by rule based fQRS extraction and a merger (48) to calculate and merge the fetal heart rate from the identified peaks.

    Apparatus and Method for Determining Fetal Movement
    3.
    发明申请
    Apparatus and Method for Determining Fetal Movement 有权

    公开(公告)号：US20210321890A1

    公开(公告)日：2021-10-21

    申请号：US17230375

    申请日：2021-04-14

    Applicant: Owlet Baby Care Inc.

    Inventor： Ajay Iyer ,  Vikranth Siddenki ,  Steven Reeves

    IPC: A61B5/024 ,  A61B5/344 ,  A61B5/00 ,  A61B5/366

    Abstract: A technology for detecting fetal movement. In one example an electrocardiogram (ECG) dataset can be obtained where the ECG dataset contains fetal heart rate (FHR) values acquired from a pregnant subject, and the ECG dataset is for a segment of time during which an FHR is monitored using an ECG monitor. An FHR baseline can be calculated for the FHR values in the ECG dataset, and the ECG dataset can be analyzed to identify an accelerated FHR value that exceeds the FHR baseline that is followed in time in the ECG dataset by a decelerated FHR value that is less than or equal to the FHR baseline. Identifying the accelerated FHR value followed in time in the ECG dataset by the decelerated FHR value in the ECG dataset may indicate a fetal movement.

    FUSION SIGNAL PROCESSING FOR MATERNAL UTERINE ACTIVITY DETECTION
    5.
    发明申请
    FUSION SIGNAL PROCESSING FOR MATERNAL UTERINE ACTIVITY DETECTION 有权

    公开(公告)号：US20240389929A1

    公开(公告)日：2024-11-28

    申请号：US18623247

    申请日：2024-04-01

    Applicant: NUVO GROUP LTD.

    Inventor： Muhammad MHAJNA

    IPC: A61B5/00 ,  A61B5/11 ,  A61B5/344 ,  A61B5/352 ,  A61B5/391

    Abstract: A computer-implemented method includes providing, by at least one computer processor, a plurality of signal channels, wherein the plurality of signal channels includes a plurality of electrical uterine monitoring signal channels and a plurality of acoustic uterine monitoring signal channels; determining, by the at least one computer processor, a plurality of channel weights, wherein each of the channel weights corresponds to a particular one of the signal channels; and generating, by the at least one computer processor, a combined uterine monitoring signal channel by calculating a weighted average of the signal channels based on the channel weight for each of the signal channels.

    Method And System For Processing A Phonocardiographic Signal Characterizing Fetal Breathing Movement
    7.
    发明申请
    Method And System For Processing A Phonocardiographic Signal Characterizing Fetal Breathing Movement 有权

    公开(公告)号：US20230058426A1

    公开(公告)日：2023-02-23

    申请号：US17793560

    申请日：2021-01-20

    Applicant: Pázmány Péter Katolikus Egyetem

    Inventor： Ferenc Kovács ,  Márton Áron Goda

    IPC: A61B8/02 ,  A61B5/344

    Abstract: The invention is a method for processing a phonocardiographic signal characterising fetal breathing movement (FBM), wherein in initial start point (SP) determination (S100) in frequency filtering (S110), bandpass-filtered signals of frequency subbands by first and second bandpass filters are generated from the phonocardiographic signal, and
    first identified SP of an FBM episode is determined in a frequency subband in SP search (S120), in episode discovering (S130) further SP is searched applying the SP search (S120) in episode search time period, and if found at smaller distance from identified SP than a clustering threshold, it is merged with identified SP,
    if found at larger distance from identified SP than the clustering threshold, an SP closest to identified SP is identified as second identified SP. The invention is, furthermore, a system for processing a phonocardiographic signal characterising FBM. (FIG. 4A)

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