A nurse is providing education to a client who is scheduled to undergo chorionic villus sampling (CVS).
Which statement by the client indicates an understanding of this test?
“This test can detect neural tube defects.”.
“This test can detect genetic disorders.”.
“This test can detect chromosomal abnormalities.”.
“This test can detect Rh sensitization.”.
The Correct Answer is B
This test can detect genetic disorders.
Chorionic villus sampling (CVS) is a prenatal test that involves taking a sample of tissue from the placenta to test for chromosomal abnormalities and certain other genetic problems.
The placenta is a structure in the uterus that provides blood and nutrients from the mother to the fetus.
Choice A is wrong because CVS does not provide information on neural tube defects, such as spina bifida.
For this reason, women who undergo CVS also need a follow-up blood test between 16 to 18 weeks of their pregnancy to screen for neural tube defects.
Choice C is wrong because CVS can detect chromosomal abnormalities, but not all chromosomal abnormalities are genetic disorders.
For example, Down syndrome is a chromosomal abnormality caused by an extra copy of chromosome 21, but it is not inherited from the parents.
Choice D is wrong because CVS cannot detect Rh sensitization, which is a condition where the mother’s immune system produces antibodies against the fetus’s blood type.
Rh sensitization can be detected by a blood test that measures the level of antibodies in the mother’s blood.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
AFP is a screening tool that can indicate the possibility of certain fetal anomalies, such as neural tube defects, abdominal wall defects, or chromosomal abnormalities.
However, AFP results are not diagnostic and cannot confirm the presence or absence of these conditions.
Therefore, further tests, such as ultrasound or amniocentesis, are needed to verify the results.
Choice A is wrong because AFP results are not diagnostic for fetal anomalies.
They only indicate a risk level that needs to be confirmed by other tests.
Choice C is wrong because AFP results can detect not only neural tube defects, but also other fetal anomalies, such as abdominal wall defects or chromosomal abnormalities.
Choice D is wrong because AFP results are not affected by maternal race and ethnicity.
They are affected by maternal age, weight, diabetes, multiple gestation, and gestational age.
Correct Answer is B
Explanation
There are no known risks or complications for the pregnant person or the fetus.
Prenatal ultrasound is a safe and noninvasive procedure that uses sound waves to create images of the fetus and the placenta.
It does not use radiation or harm the fetal tissues.
Choice A is wrong because ultrasound does not cause harm to the fetus.
There is no evidence that ultrasound has any adverse effects on fetal development, growth, or health.
Choice C is wrong because pregnant individuals do not need to avoid ultrasound due to potential radiation exposure.
Ultrasound does not involve radiation, unlike x-rays or CT scans.
Choice D is wrong because ultrasound does not lead to miscarriage or preterm labor.
Ultrasound is not associated with any increased risk of pregnancy complications, such as miscarriage, preterm labor, or birth defects.
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