Review Practice Exercise 3

Antepartum Diagnostic Testing > Maternal Newborn

Exam Review

Practice Exercise 3

Share This Link

Share on social media

Facebook

Messager

WhatsApp

Share URL
Copy

We are excited to announce the release of a NEW VERSION OF THE SYSTEM! To benefit from the latest features, improvements, and component updates, please switch to the new system as soon as possible.

Visit Latest Version

Total Questions : 5

Showing 5 questions, Sign in for more

Question 1:

Which diagnostic test is performed by sampling placental tissue to analyze fetal DNA?

A. Amniocentesis B. Cordocentesis C. Chorionic villus sampling D. Nuchal translucency ultrasound

Answer and Explanation

Choice A:

Amniocentesis involves sampling of amniotic fluid, not placental tissue. It is performed after 15 weeks and is used for chromosomal analysis, neural tube defect detection, and genetic studies. It does not involve chorionic villi and is therefore not the test described.

Choice B:

Cordocentesis, also called percutaneous umbilical blood sampling, involves obtaining fetal blood from the umbilical vein under ultrasound guidance, usually after 18 weeks. It is used for rapid karyotyping, detection of fetal anemia, and certain infections. It does not analyze placental tissue, so it does not fit.

Choice C:

Chorionic villus sampling directly obtains placental villi containing fetal DNA, making it the test described in the question. It is indicated for early detection of genetic disorders such as trisomy 21. The stem specifies placental tissue analysis for fetal DNA, which matches this procedure exactly.

Choice D:

Nuchal translucency ultrasound measures the fluid-filled space at the back of the fetal neck between 11–14 weeks. Increased thickness is associated with chromosomal abnormalities such as trisomy 21. This method uses ultrasound imaging only, not tissue or DNA sampling, so it is not correct.

Discussion Section

Posting as Anonymous or Login Here

0 Pulse Checks

No comments

Question 2:

A nurse is counseling a patient about the risks of amniocentesis. Which complication should the nurse mention?

A. Increased risk of preterm labor B. Risk of miscarriage (0.5–1%) C. Development of gestational diabetes D. Fetal growth restriction

Answer and Explanation

Choice A:

Increased risk of preterm labor is not a typical complication of amniocentesis when performed in the second trimester. Preterm labor is more strongly associated with uterine or cervical conditions and not directly linked to the sampling of fluid.

Choice B:

Risk of miscarriage (0.5–1%) is the primary complication of amniocentesis. The procedure involves puncturing the amniotic sac, which can disrupt membranes or cause infection leading to pregnancy loss. This percentage is widely accepted as the main quantified risk associated with the test.

Choice C:

Development of gestational diabetes is unrelated to amniocentesis. Gestational diabetes results from insulin resistance mediated by placental hormones such as human placental lactogen. An invasive diagnostic test does not alter glucose metabolism.

Choice D:

Fetal growth restriction is not caused by amniocentesis. Growth restriction results from placental insufficiency, maternal hypertension, smoking, or infection. Amniocentesis does not alter nutrient supply or placental function, so it is not a complication.

Discussion Section

Posting as Anonymous or Login Here

0 Pulse Checks

No comments

Question 3:

The nurse is educating a client about the risks of Chorionic Villus Sampling (CVS). Which of the following is a potential complication specific to CVS compared to amniocentesis, particularly if performed too early?

A. Fetal bradycardia B. Limb reduction defects C. Maternal infection D. Preterm labor

Answer and Explanation

Choice A:

Fetal bradycardia can occur transiently with many invasive procedures, including amniocentesis and cordocentesis, but it is not specific to CVS. It generally resolves without lasting consequences and is not the hallmark complication linked to CVS timing.

Choice B:

Limb reduction defects are a complication specific to CVS if performed too early, especially before 10 weeks. Early disruption of embryonic vascular supply may impair proper limb development, leading to hypoplasia or amputation-type defects. This risk is not associated with amniocentesis.

Choice C:

Maternal infection, such as chorioamnionitis, is a rare complication of both CVS and amniocentesis. It results from invasive instrumentation but is not unique to CVS nor tied to gestational timing.

Choice D:

Preterm labor is not a typical risk associated with CVS because it is performed in the first trimester. Preterm labor complications occur later in pregnancy, and procedures like amniocentesis or trauma are more relevant contributors.

Discussion Section

Posting as Anonymous or Login Here

0 Pulse Checks

No comments

Question 4:

Which of the following are potential complications of amniocentesis? Select all that apply

A. Miscarriage B. Infection C. Gestational diabetes D. Cramping E. Maternal hypertension

Answer and Explanation

Choice A:

Miscarriage is the most significant complication, occurring in 0.5–1% of cases. It results from rupture of membranes, bleeding, or infection following the procedure.

Choice B:

Infection, such as chorioamnionitis, may occur due to introduction of pathogens during needle insertion. It is rare but serious and can threaten both mother and fetus.

Choice C:

Gestational diabetes is unrelated to amniocentesis. It develops from placental hormone–induced insulin resistance, not from invasive procedures.

Choice D:

Cramping is a common minor complication due to uterine irritation from the needle puncture. It usually resolves without intervention but must be monitored.

Choice E:

Maternal hypertension is not a recognized complication of amniocentesis. Hypertensive disorders in pregnancy are linked to placental dysfunction, not diagnostic sampling.

Discussion Section

Posting as Anonymous or Login Here

0 Pulse Checks

No comments

Question 5:

Which of the following are components of the biophysical profile (BPP)? Select all that apply

A. Fetal breathing movements B. Maternal blood pressure C. Fetal movement D. Amniotic fluid volume E. Non-stress test

Answer and Explanation

Choice A:

Fetal breathing movements are assessed by ultrasound; at least 1 episode of rhythmic breathing lasting ≥30 seconds in 30 minutes is normal.

Choice B:

Maternal blood pressure is not part of the BPP. It is assessed separately in maternal monitoring, particularly in preeclampsia evaluation, but it is not a fetal biophysical parameter.

Choice C:

Fetal movement is part of the BPP; ≥3 discrete body or limb movements within 30 minutes indicates normal activity.

Choice D:

Amniotic fluid volume reflects chronic uteroplacental function. A single vertical pocket ≥2 cm or AFI ≥5 cm is normal.

Choice E:

Non-stress test evaluates fetal heart rate accelerations with movement. Normal is ≥2 accelerations of ≥15 bpm lasting ≥15 seconds in 20 minutes.

Discussion Section

Posting as Anonymous or Login Here

0 Pulse Checks

No comments

Sign Up or Login to view all the 5 Questions on this Exam

Join over 100,000+ nursing students using Naxlex’s science-backend flashcards, practice tests and expert solutions to improve their grades and reach their goals.

Nursing Offer

Upgrade your membership - 15% off

20,000+ questions
to help you excel in your exams.
Exams & Tests
20+ Exit exams & 100+ Test Banks.
Video tutorials
to enhance your learning
Comprehensive study guides
to support your exam preparation.

Get Your Offer Today

Exam Review

Practice Exercise 3 Share this Share This Link Share on social media Facebook Messager WhatsApp Share URL Copy Close

Total Questions : 5

Sign Up or Login to view all the 5 Questions on this Exam

Practice Exercise 3

Share This Link

Share on social media

Facebook

Messager

WhatsApp

Share URL
Copy