Which instrument is used during labor to record the fetal heart rate and the maternal uterine contractions?
Question
Which instrument is used during labor to record the fetal heart rate and the maternal uterine contractions?
Solution
The instrument used during labor to record the fetal heart rate and the maternal uterine contractions is called a Cardiotocograph (CTG).
Here are the steps of how it works:
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The pregnant woman is made to lie down on her left side to prevent supine hypotensive syndrome.
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Two transducers are placed on the woman's abdomen. One (the Doppler probe) is for monitoring the fetal heart rate. It emits ultrasound waves that bounce off the baby's heart and are picked up again by the probe. The other (the tocodynamometer) measures the frequency and duration of uterine contractions.
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The Doppler probe detects the movement of the baby's heart, and the machine calculates the heart rate. This is displayed as a graph on a screen and/or printed out on paper.
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The tocodynamometer measures the tension in the abdominal wall, which increases during a contraction. This is also displayed as a graph.
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The two graphs allow healthcare professionals to monitor the baby's heart rate in relation to the mother's contractions. This can provide information about how the baby is coping with labor and whether any interventions are required.
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