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 A

Explanation

Place the device over the fetal back for 3 seconds.This is because vibroacoustic stimulation (VAS) is the application of a vibratory sound stimulus to the abdomen of a pregnant woman to induce fetal heart rate (FHR) accelerations.The presence of FHR accelerations reliably predicts the absence of fetal metabolic acidemia.VAS is typically used during a nonstress test (NST) to assess fetal well-being.The device should be placed over the fetal back for 3 seconds, as this is the optimal duration and location to elicit a fetal response.

Choice B is wrong because holding the device firmly against the maternal abdomen for 10 seconds may be too long and too strong for the fetus, and may cause discomfort or distress.

Choice C is wrong because moving the device around the maternal abdomen until fetal movement is detected may not be effective or efficient, as the device may not reach the optimal location or duration to stimulate the fetus.

Choice D is wrong because applying the device intermittently over the fundus for 15 seconds may not target the fetal auditory system, which is located near the fetal back, and may also be too long and too strong for the fetus.

Normal ranges for FHR are between 110 and 160 beats per minute, and FHR accelerations are defined as an increase of at least 15 beats per minute above baseline for at least 15 seconds.

A. Change the client's position. B. Administer oxygen via face mask C. Increase intravenous fluid rate. D. Notify the health care provider.

Correct Answer is D

Explanation

Notify the health care provider.Late decelerations are a sign of uteroplacental insufficiency, which means that the blood flow and oxygen supply to the placenta and the fetus are compromised.This is a serious condition that can lead to fetal hypoxia and acidosis.The priority nursing intervention is to inform the health care provider who can assess the situation and decide on the appropriate course of action, such as delivery by cesarean section.

Choice A is wrong because changing the client’s position may not improve the blood flow to the placenta if there is a problem with the placenta itself, such as placental abruption.

Choice B is wrong because administering oxygen via face mask may not be enough to correct the fetal hypoxia caused by uteroplacental insufficiency.

Choice C is wrong because increasing intravenous fluid rate may not improve the blood flow to the placenta if there is a problem with the maternal blood pressure, such as hypotension from epidural analgesia.

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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?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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?

Correct Answer is A

Explanation

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?

Correct Answer is D

Explanation

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 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 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?

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 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.)

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?