Which of the following is a primary indication for performing a nonstress test during pregnancy?

To determine the exact gestational age of the fetus

To measure the amniotic fluid volume

To confirm the presence of labor contractions

To assess fetal well-being in cases of suspected fetal growth restriction

Answer and Explanation

The Correct Answer is D

A. To determine the exact gestational age of the fetus. Gestational age is estimated via ultrasound and fundal height, not an NST.

B. To measure the amniotic fluid volume. Amniotic fluid volume is assessed with an ultrasound and amniotic fluid index (AFI), not an NST.

C. To confirm the presence of labor contractions. An NST does not confirm labor contractions; it evaluates fetal heart rate in response to fetal movement.

D. To assess fetal well-being in cases of suspected fetal growth restriction. An NST evaluates fetal oxygenation and well-being, making it useful in cases of intrauterine growth restriction (IUGR) or other concerns about fetal health.

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Correct Answer is A

Explanation

A. Variable decelerations are due to umbilical cord compression. Variable decelerations are characterized by abrupt decreases in FHR, often with a "V" or "U" shape. They are caused by umbilical cord compression, which disrupts fetal oxygenation.

B. Variable decelerations are a result of the administration of IV narcotic analgesics. Narcotic analgesics (e.g., morphine, fentanyl) cause decreased FHR variability and prolonged decelerations, not variable decelerations.

C. Variable decelerations are caused by uteroplacental insufficiency. Uteroplacental insufficiency causes late decelerations, not variable decelerations.

D. Variable decelerations are related to fetal head compression. Fetal head compression causes early decelerations, which are gradual and mirror contractions, unlike variable decelerations.

A. Contractions that last for 60 seconds each with a 2-min rest between contractions B. Contractions that last for 60 seconds each with a 3-min rest between contractions C. A contraction that lasts 3 min followed by a period of relaxation D. Contractions that last 45 seconds each with a 2-min rest between contractions

Correct Answer is A

Explanation

A. Contractions that last for 60 seconds each with a 2-min rest between contractions. If contractions are 3 minutes apart, this means the interval from the start of one contraction to the start of the next is 3 minutes. If each contraction lasts for 60 seconds, there will be a 2-minute rest period before the next contraction begins.

B. Contractions that last for 60 seconds each with a 3-min rest between contractions. This would indicate contractions occurring every 4 minutes, not every 3 minutes.

C. A contraction that lasts 3 min followed by a period of relaxation. A contraction lasting 3 minutes is abnormal and suggests uterine tachysystole, which can be dangerous.

D. Contractions that last 45 seconds each with a 2-min rest between contractions. If contractions last 45 seconds, the remaining rest period would be 2 min 15 sec, not exactly 2 minutes.

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Which of the following is a primary indication for performing a nonstress test during pregnancy?

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Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who is in the first stage of labor, undergoing external fetal monitoring, and receiving IV fluid. The nurse observes variable decelerations in the fetal heart rate on the monitor strip. Which of the following is a correct interpretation of this finding?

Correct Answer is A

Explanation

A nurse receives a report about a client who is in labor and is having contractions 3 min apart. Which of the following patterns should the nurse expect on the fetal monitoring tracing?

Correct Answer is A

Explanation

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