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Obstetrics: Nonstress Test

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Braxton-Hicks contractions causing fetal heart rate changes

Fetal movement causing an increase in uterine contractions

Fetal heart rate slows in response to a uterine contraction (correct)

Fetal heart sounds increase in response to fetal movement

No change in fetal heart rate with fetal movement

Fetal heart rate accelerates with fetal movement (correct)

Fetal heart rate variability decreases

Fetal heart rate deceleration with fetal movement

40 seconds

30 seconds

20 seconds (correct)

10 seconds

<p>15 BPM</p> Signup and view all the answers

A nonstress test is an assessment test based on the phenomenon of fetal heart rate response to fetal movement.
Fetal heart rate slows in response to a uterine contraction.
A reactive nonstress test is characterized by acceleration of fetal heart rate with each fetal movement.
In a reactive test, the acceleration of fetal heart rate is at least 15 BPM and lasts for at least 15 seconds.
A reactive test is considered normal if the acceleration occurs at least twice during the 20-minute test, with each acceleration lasting at least 15 seconds.
In the given scenario, the nonstress test is considered reactive because the fetal heart rate accelerated 15 BPM with each fetal movement, lasted for 20 seconds, and occurred 3 times during the 20-minute test.