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The OB provider is concerned about placental perfusion and intrauterine growth restriction (IUGR) after noting minimal fetal growth over the past month.

 

What non-invasive antenatal test would the nurse anticipate the provider will order?

A.

Magnetic Resonance Imaging (MRI).

B.

Doppler flow studies.

C.

Amniocentesis.

D.

Chorionic villus sampling (CVS).

Answer and Explanation

The Correct Answer is B

Choice A rationale

 

Magnetic Resonance Imaging (MRI) is a non-invasive imaging technique that provides detailed images of the fetus and placenta. However, it is not typically used as the first-line test for assessing placental perfusion and IUGR. Doppler flow studies are more specific for evaluating blood flow and detecting issues related to placental insufficiency.

 

Choice B rationale

 

Doppler flow studies are non-invasive tests that assess blood flow in the umbilical artery and other fetal vessels. These studies are particularly useful in evaluating placental perfusion and identifying intrauterine growth restriction (IUGR). Abnormal Doppler flow patterns can indicate compromised blood flow to the fetus, which is a concern in cases of minimal fetal growth.

 

Choice C rationale

 

Amniocentesis is an invasive procedure that involves extracting a sample of amniotic fluid for genetic testing and assessment of fetal lung maturity. It is not used for evaluating placental perfusion or IUGR7.

 

Choice D rationale

 

Chorionic villus sampling (CVS) is an invasive procedure used for early genetic testing by sampling placental tissue. It is not used for assessing placental perfusion or IUGR7.


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View Related questions

Correct Answer is B

Explanation

Choice A rationale

Category I tracings are considered normal and are associated with a well-oxygenated, non-acidotic fetus with a normal fetal heart rate baseline, moderate variability, and no late or variable decelerations. However, a baseline heart rate of 175 bpm is considered tachycardia, which does not fit the criteria for Category I.

Choice B rationale

Category II tracings are indeterminate and include any fetal heart rate pattern that does not fit into Category I or III. A baseline heart rate of 175 bpm with moderate variability and no accelerations or decelerations fits into this category. This indicates that the fetus may be experiencing some stress but is not in immediate danger.

Choice C rationale

Category III tracings are abnormal and are associated with an increased risk of fetal acidemia. These tracings include absent baseline variability with recurrent late or variable decelerations, bradycardia, or a sinusoidal pattern. The given tracing does not meet these criteria as it shows moderate variability and no decelerations.

Choice D rationale

There is no Category IV in the classification of fetal heart rate tracings. The standard classification includes only Categories I, II, and III.

Correct Answer is B

Explanation

Choice A rationale

Variable decelerations are not related to the use of narcotic analgesics. Narcotic analgesics can cause other fetal heart rate changes, such as decreased variability, but they do not cause variable decelerations.

Choice B rationale

Variable decelerations are due to umbilical cord compression. This is the correct interpretation. Umbilical cord compression can lead to transient decreases in fetal blood flow and oxygenation, resulting in variable decelerations on the fetal monitor tracing.

Choice C rationale

Variable decelerations are not caused by maternal hypotension. Maternal hypotension can lead to late decelerations due to uteroplacental insufficiency, but it does not cause variable decelerations.

Choice D rationale

Variable decelerations are not indicative of fetal hypoxia. While severe and persistent variable decelerations can lead to fetal hypoxia, the primary cause of variable decelerations is umbilical cord compression.

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