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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 A

Explanation

Choice A rationale

This statement is incorrect. Vagus nerve stimulation actually decreases FHR variability. The vagus nerve, part of the parasympathetic nervous system, slows the heart rate and reduces variability.

Choice B rationale

This statement is correct. Baroreceptors are sensors located in blood vessels that help regulate blood pressure by detecting changes in the stretch of the vessel walls. They play a crucial role in maintaining stable blood pressure levels.

Choice C rationale

This statement is correct. The autonomic nervous system, which includes the sympathetic and parasympathetic nervous systems, controls the fetal heart rate. It regulates the balance between heart rate acceleration and deceleration.

Choice D rationale

This statement is correct. Chemoreceptors respond to changes in blood gas levels, such as oxygen and carbon dioxide. They help regulate respiratory and cardiovascular responses to maintain homeostasis.

Correct Answer is A

Explanation

Choice A rationale

The “Passenger” refers to the fetus and its position, size, and presentation. In this case, the fetus has an estimated weight of 9 lbs and is in the left occiput posterior (LOP) position. These factors can complicate labor by making it more difficult for the fetus to navigate through the birth canal, potentially leading to prolonged labor and increased risk of interventions.

Choice B rationale

The “Passage” refers to the birth canal, including the pelvis and soft tissues. While the passage is an important factor in labor, the primary concern in this scenario is the size and position of the fetus, which falls under the “Passenger” category.

Choice C rationale

The “Powers” refer to the strength and frequency of uterine contractions. Although the patient is having contractions every 3 minutes, the main concern here is the fetal size and position, which are more directly related to the "Passenger"4.

Choice D rationale

The “Psyche” refers to the psychological state of the mother, including her stress levels and emotional well-being. While important, the primary concern in this scenario is the physical factors related to the fetus, which are categorized under the "Passenger"4.

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