A nurse is explaining the purpose of a Contraction Stress Test (CST) to a pregnant client.

What does the CST aim to assess?

Fetal well-being.

Maternal blood pressure.

Placental function.

Amniotic fluid volume.

Answer and Explanation

The Correct Answer is A

A contraction stress test (CST) is performed near the end of pregnancy to determine how well the fetus will cope with the contractions of childbirth.

The aim is to induce contractions and monitor the fetus to check for heart rate abnormalities using a cardiotocograph.

A normal heartbeat is a good sign that the fetus will be healthy during labor.

Choice B is wrong because a CST does not measure maternal blood pressure.

Choice C is wrong because a CST does not assess placental function directly.

Choice D is wrong because a CST does not measure amniotic fluid volume.

Normal ranges for fetal heart rate are between 110 and 160 beats per minute.

Normal ranges for uterine contractions are between 2 and 5 contractions in 10 minutes, lasting less than 90 seconds each.

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Correct Answer is A

Explanation

This result suggests that the baby has a low risk of having a genetic disorder or a neural tube defect.

Choice B is wrong because a high level of AFP indicating a neural tube defect would be greater than 2 MoM.

Choice C is wrong because a low level of AFP indicating a potential chromosomal abnormality would be less than 0.5 MoM.

Choice D is wrong because an inconclusive result, requiring further evaluation, would depend on other factors such as ultrasound findings and maternal age.

MoM stands for multiples of the median, which is a way of comparing the AFP level of a pregnant person to the average level for their gestational age.

Values between 0.5 and 2.49 MoM are considered normal.

A. No contractions were induced during the test. B. Late decelerations of the FHR were observed with at least 50% of contractions. C. The FHR remained stable throughout the test. D. The client experienced mild uterine cramping during the tes.

Correct Answer is C

Explanation

This means that the baby’s heart rate did not slow down after the contractions induced by oxytocin, which is a sign of normal fetal well-being.

A negative CST is normal and desirable.

Choice A is wrong because no contractions were induced during the test.

This means that the test was inconclusive and could not assess the baby’s response to stress.

Choice B is wrong because late decelerations of the FHR were observed with at least 50% of contractions.

This means that the baby’s heart rate slowed down and stayed slow after the contractions, which is a sign of fetal distress and hypoxia.

A positive CST is abnormal and concerning.

Choice D is wrong because the client experienced mild uterine cramping during the test.

This is not a relevant factor for interpreting the CST results, which depend on the FHR patterns.

Uterine cramping can be a side effect of oxytocin administration or nipple stimulation.

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A nurse is explaining the purpose of a Contraction Stress Test (CST) to a pregnant client. What does the CST aim to assess?

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Naxlex Comprehensive Predictor Exams

A client's Alpha-fetoprotein Test (AFP) result is reported as 0.8 MoM. What does this result suggest?

Correct Answer is A

Explanation

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Correct Answer is C

Explanation

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A nurse is explaining the purpose of a Contraction Stress Test (CST) to a pregnant client.

What does the CST aim to assess?