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Fetal Heart Rate and Activity Monitor - Baby Doppler . Dopplers for home or hospital use differ in the following ways: Manufacturer: popular manufacturers Baby Doppler, Sonoline, Ultrasound Technologies, Newman Medical, Nicolet (purchased by Natus), Arjo-Huntleigh, and Summit Doppler (now Cooper Surgical).
A normal nonstress test will show a baseline fetal heart rate between 110 and 160 beats per minute with moderate variability (5- to 25-interbeat variability) and 2 qualifying accelerations in 20 minutes with no decelerations. "Reactive" is defined as the presence of two or more fetal heart rate accelerations within a 20-minute period. Each ...
Internal monitoring provides a more accurate and consistent transmission of the fetal heart rate, as unlike external monitoring, it is not affected by factors such as movement. Internal monitoring may be used when external monitoring is inadequate, or if closer surveillance is needed. [ 8 ]
During uterine contractions, fetal oxygenation is worsened. Late decelerations in fetal heart rate occurring during uterine contractions are associated with increased fetal death rate, growth retardation and neonatal depression. [1] [2] This test assesses fetal heart rate in response to uterine contractions via electronic fetal monitoring.
Monitoring the fetal heart rate is becoming increasingly prevalent in the standard care of antepartum pregnant patients. [8] As of 2002, 85% of pregnancies in the United States were monitored using electronic fetal monitoring.
The condition is detected most often with electronic fetal heart rate (FHR) monitoring through cardiotocography (CTG), which allows clinicians to measure changes in the fetal cardiac response to declining oxygen. [1] [5] [4] Specifically, heart rate decelerations detected on CTG can represent danger to the fetus and to delivery. [4]
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