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Fetal heart rate extraction from maternal abdominal ECG recordings

A fetal heart rate, maternal technology, applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, medical science, etc.

Active Publication Date: 2016-04-27
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite advances in adult electrocardiography and signal processing techniques, analysis of the fetal ECG is still in its infancy

Method used

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  • Fetal heart rate extraction from maternal abdominal ECG recordings
  • Fetal heart rate extraction from maternal abdominal ECG recordings
  • Fetal heart rate extraction from maternal abdominal ECG recordings

Examples

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Embodiment Construction

[0045] The present application relates to a method for improved fetal heart rate extraction and interpretation. The present disclosure is inspired by the insight that current methods for monitoring fetal heart rate are unreliable and difficult to account for cesarean births resulting in an increase in healthy babies. Currently, the most accurate method for measuring fetal heart rate is direct fetal electrocardiography using fetal scalp electrodes, which is usually only used during labor due to its associated risks during routine pregnancy checkups. Non-invasive fetal ECG monitoring is measured by electrodes placed on the mother's abdomen, however, detecting the fetal heart rate is often difficult because the maternal ECG is usually more prevalent.

[0046] The present application presents an improved algorithm for extracting fetal heart rate from abdominal fECG recordings using spatial filtering, such as principal component analysis and orthogonal projection techniques for mat...

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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.

Description

technical field [0001] The present application generally relates to the extraction of fetal heart rate from maternal abdominal electrocardiogram (ECG) recordings. It finds particular application in connection with the use of spatial filtering and adaptive rule-based fetal QRS detection and will be described with particular reference thereto. However, it should be understood that it is also applicable to other usage scenarios and is not necessarily limited to the aforementioned applications. Background technique [0002] Heart defects are among the most common birth defects and are the leading cause of death related to birth defects. Each year, about 1 in 125 babies are born with some form of congenital heart defect. Congenital heart defects originate early in pregnancy when the heart is forming, and they can affect any part or function of the heart. Heart malformations can occur as a result of genetic syndromes, genetic disorders, or environmental factors such as infectio...

Claims

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Application Information

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IPC IPC(8): A61B5/024A61B5/0444A61B5/00A61B5/0255A61B5/0402A61B5/0468A61B5/344A61B5/352A61B5/364A61B5/366
CPCA61B5/7203A61B5/02405A61B5/02411A61B5/0255A61B5/4362A61B5/725A61B5/7253A61B5/327A61B5/344A61B5/364A61B5/316A61B5/366A61B5/352A61B5/346
Inventor 程力美E·T·卡尔森S·瓦伊拉万M·徐
Owner KONINKLJIJKE PHILIPS NV
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