Performance of a wearable acoustic system for fetal movement discrimination

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Title: Performance of a wearable acoustic system for fetal movement discrimination
Authors: Lai, J
Woodward, R
Alexandrov, Y
Munnee, QA
Lees, CC
Vaidyanathan, R
Nowlan, NC
Item Type: Journal Article
Abstract: Fetal movements (FM) are a key factor in clinical management of high-risk pregnancies such as fetal growth restriction. While maternal perception of reduced FM can trigger self-referral to obstetric services, maternal sensation is highly subjective. Objective, reliable monitoring of fetal movement patterns outside clinical environs is not currently possible. A wearable and non-transmitting system capable of sensing fetal movements over extended periods of time would be extremely valuable, not only for monitoring individual fetal health, but also for establishing normal levels of movement in the population at large. Wearable monitors based on accelerometers have previously been proposed as a means of tracking FM, but such systems have difficulty separating maternal and fetal activity and have not matured to the level of clinical use. We introduce a new wearable system based on a novel combination of accelerometers and bespoke acoustic sensors as well as an advanced signal processing architecture to identify and discriminate between types of fetal movements. We validate the system with concurrent ultrasound tests on a cohort of 44 pregnant women and demonstrate that the garment is capable of both detecting and discriminating the vigorous, whole-body ‘startle’ movements of a fetus. These results demonstrate the promise of multimodal sensing for the development of a low-cost, non-transmitting wearable monitor for fetal movements.
Issue Date: 7-May-2018
Date of Acceptance: 28-Mar-2018
ISSN: 1932-6203
Publisher: Public Library of Science (PLoS)
Journal / Book Title: PLoS ONE
Volume: 13
Issue: 5
Copyright Statement: © 2018 Lai et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Sponsor/Funder: Imperial Innovations Ltd
Engineering & Physical Science Research Council (E
Funder's Grant Number: Case No. 6808
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
MD Multidisciplinary
General Science & Technology
Publication Status: Published
Open Access location:
Article Number: ARTN e0195728
Appears in Collections:Mechanical Engineering
Division of Surgery
Faculty of Medicine
Faculty of Natural Sciences

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