A nurse is comparing nonstress test (NST) and contraction stress test (CST) for assessing fetal well-being.

What is an advantage of NST over CST?

NST provides more information about fetal status than CST

NST is less time-consuming and more comfortable than CST

NST has fewer contraindications and complications than CST

NST has higher sensitivity and specificity than CST

Answer and Explanation

The Correct Answer is B

NST is less time-consuming and more comfortable than CST. This is because NST does not require any external stimulation of the uterus, while CST involves giving oxytocin to induce contractions. NST also does not pose any risk of preterm labor or fetal distress, which are possible complications of CST.

Choice A is wrong because NST does not provide more information about fetal status than CST. In fact, CST can detect fetal hypoxia more accurately than NST.

Choice C is wrong because NST does not have fewer contraindications than CST. Both tests have similar contraindications, such as placenta previa, multiple gestation, and previous cesarean section.

Choice D is wrong because NST does not have higher sensitivity and specificity than CST.

Sensitivity refers to the ability of a test to correctly identify positive cases, while specificity refers to the ability of a test to correctly identify negative cases.

NST has a high sensitivity but a low specificity, meaning it can detect most fetuses with hypoxia but also has many false positives. CST has a low sensitivity but a high specificity, meaning it can miss some fetuses with hypoxia but also has few false negatives.

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Correct Answer is B

Explanation

Negative CST.A negative CST means that there are no late or significant variable decelerations of the fetal heart rate (FHR) during three uterine contractions in 10 minutes.

This indicates that the fetus is well oxygenated and can tolerate the stress of labor contractions.

Choice A is wrong because a positive CST means that there are late decelerations of the FHR with 50% or more of the contractions.

This suggests that the fetus is at risk of hypoxia and may need early delivery.

Choice C is wrong because an unsatisfactory CST means that there are fewer than three contractions in 10 minutes or the tracing is not interpretable.

This does not provide enough information to assess the fetal well-being.

Choice D is wrong because an equivocal CST means that there are either intermittent late decelerations or significant variable decelerations.

This indicates that the fetus may have some degree of compromise and may need further testing.

Normal ranges for FHR are 110 to 160 beats per minute, and for uterine contractions are 2 to 5 per 10 minutes.

A. Fetal breathing movement B. Fetal tone C. Reactive fetal heart rate D. Amniotic fluid volume E. Fetal position

Correct Answer is ["A","B","C","D"]

Explanation

The correct answer is choice A, B, C and D.These are the four components of a biophysical profile (BPP) that are scored as 2 (normal) or 0 (abnormal) based on ultrasound examination.The fifth component is the nonstress test (NST) that measures the fetal heart rate reactivity.A total score of 8 or 10 is normal, 6 is equivocal, and 4 or less is abnormal.

Choice E is wrong because fetal position is not a part of the BPP score.Fetal position is determined by ultrasound but it does not affect the score.

Normal ranges for each component are:

• Fetal breathing movement: One or more episodes of fetal breathing lasting at least 30 seconds within 30 minutes.

• Fetal tone: One or more episodes of active extension and flexion of a fetal extremity or opening and closing of the hand within 30 minutes.

• Reactive fetal heart rate: Two or more fetal heart rate accelerations that peak at least 15 beats per minute above the baseline and last at least 15 seconds from baseline to baseline during 20 minutes of observation.

• Amniotic fluid volume: A single deepest vertical pocket of amniotic fluid that measures at least 2 centimeters.

• Gross body movement: Three or more discrete body or limb movements within 30 minutes.

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A nurse is comparing nonstress test (NST) and contraction stress test (CST) for assessing fetal well-being. What is an advantage of NST over CST?

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Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who is pregnant and undergoing a contraction stress test (CST). The nurse observes three uterine contractions in 10 minutes, with no late or significant variable decelerations of the fetal heart rate (FHR). How should the nurse interpret this finding?

Correct Answer is B

Explanation

A nurse is reviewing the findings of a biophysical profile (BPP) for a client who is at 40 weeks of gestation. The BPP score is 6 out of 10 points. Which of the following components are included in this score? (Select all that apply.)

Correct Answer is ["A","B","C","D"]

Explanation

A nurse is providing discharge instructions to a client who had a nonreactive nonstress test (NST) followed by a biophysical profile (BPP) with a score of 8/10. Which of the following statements by the client indicates an understanding of the teaching?

A nurse is caring for a client who is undergoing an oxytocin-stimulated contraction stress test (CST). The nurse observes three contractions in 10 minutes with no late decelerations of the fetal heart rate (FHR). Which of the following actions should the nurse take?

A nurse is interpreting the results of a contraction stress test (CST) for a client who is at 38 weeks of gestation. The nurse notes that there are no late or significant variable decelerations of the fetal heart rate (FHR). How should the nurse document this finding?

A nurse is assessing a fetal heart rate (FHR) tracing for a client who is in active labor. The nurse notes that the baseline FHR is 150 bpm with absent variability and recurrent variable decelerations with slow return to baseline. What category of FHR tracing does this represent?

A nurse is caring for a client in labor who has an internal fetal scalp electrode applied for continuous fetal heart rate (FHR) monitoring. The nurse notes a pattern of late decelerations on the FHR tracing. What is the priority nursing intervention?

A nurse is caring for a client who is scheduled for an amniocentesis at 35 weeks of gestation to assess fetal lung maturity. Which of the following laboratory tests will provide this information?

A nurse is using vibroacoustic stimulation (VAS) to stimulate fetal movement during a nonstress test (NST). What action should the nurse take when applying VAS?

A nurse is comparing nonstress test (NST) and contraction stress test (CST) for assessing fetal well-being.

What is an advantage of NST over CST?