Fetal Distress Clinical Trial
Official title:
A Mixed Methods Study to Explore the Feasibility of a Novel Continuous Fetal Monitoring
A stillbirth describes when a baby dies after 24 weeks of pregnancy and before being born. In the UK there are roughly 9 stillbirths every day. Normally, before a stillbirth occurs changes such as a slower heart rate and reduced movement take place. Fetal monitoring attempts to detect these changes so that babies can be delivered before they become severely ill. If a baby could be monitored continuously then these changes could be detected earlier. However, current forms of fetal monitoring, such as ultrasound, cannot be used for long periods of time and do not significantly reduce stillbirth rates. The Monica AN24 device is a continuous monitor which records the baby's heart rhythm using sensors placed on the mother's abdomen. As this is a new device there is little evidence about how well it works. In this project women will be asked how they feel about the device after wearing it. Doctors and midwives will also be asked about their views of the device. The effect of the mother's movement and the age of the baby on how well the Monica AN24 can record the baby's heart rhythm will also be assessed.
In the United Kingdom (UK) stillbirth is defined as the death of a fetus before birth and
after 24 weeks gestation. The incidence of stillbirth in the UK was 4.6 per 1000 in 2014. The
annual rate of reduction was 1.4%, a rate considerably lower than other high income
countries, such as Poland (4.5%) and Netherlands (6.8%), demonstrating that more can be done
to reduce stillbirth rates in the UK. Stillbirths are often preceded by a series of adaptive
changes, including changes in fetal heart rate (FHR) and reduced fetal movement. Fetal
monitoring serves, in part, to identify these changes so that appropriate intervention can be
initiated and adverse outcomes prevented. However, currently used forms of fetal monitoring,
including Doppler ultrasound and cardiotocography, cannot provide an objective, longitudinal
view of fetal wellbeing and do not significantly reduce stillbirth rates. A continuous fetal
monitor could identify signs of fetal compromise earlier.
A recent study found that 45.1% of surveyed clinicians thought that a continuous fetal
monitor would be beneficial to their practice, although 81.7% also expressed concerns about
the utility and clinical implementation of such a device. The Monica AN24 monitor is a novel
continuous fetal monitoring device which records the fetal electrocardiogram (fECG) via
trans-abdominal electrodes. Monica AN24 has been shown to have good recording quality though
one study reported an association between recording quality and gestational age. The effect
of the device on maternal anxiety is not known. All studies assessing acceptability of the
device to women have focused on the intrapartum period or during induction of labor.
Consequently, a prospective observational cohort study is needed to assess the acceptability
of the Monica AN24 device in the context of antenatal care, as is further exploration of
factors affecting recording quality of the Monica AN24 device.
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