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.”.

Answer and Explanation

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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Correct Answer is B

Explanation

The client should not eat a light meal before an abdominal ultrasound because it can interfere with the quality of the images.

The client should fast for 8 to 12 hours before the procedure.

Some additional information about the other choices are:

Choice A is correct.

The client should drink plenty of fluids before an appointment for an abdominal ultrasound because it helps to fill the bladder and push the uterus up for better visualization.

Choice C is correct.

The client should wear comfortable clothing that can be easily removed or lifted up to expose the abdomen.

Choice D is correct.

The client should arrive at the appointment with a full bladder because it acts as an acoustic window and improves the quality of the ultrasound images.

Normal ranges for fetal growth and development during pregnancy vary depending on the gestational age, but some general parameters are:

Fetal heart rate: 110 to 160 beats per minute

Biparietal diameter: 2.4 to 9.5 cm

Crown-rump length: 0.8 to 8.4 cm

Femur length: 1.0 to 7.8 cm

Abdominal circumference: 9.4 to 35.6 cm

A. Neural tube defect. B. Chromosomal abnormality. C. Maternal weight-related factors. D. Fetal demise.

Correct Answer is B

Explanation

A low level of AFP (<0.5 MoM) in a pregnant woman can indicate that the fetus has a chromosomal abnormality, such as Down syndrome or Edwards syndrome.

This is because these conditions affect the development of the fetal liver, which produces AFP.

Choice A is wrong because neural tube defects, such as spina bifida, are associated with high levels of AFP (>2.5 MoM) in the maternal blood.

This is because AFP can leak from the open spinal canal of the fetus into the amniotic fluid and then into the maternal blood.

Choice C is wrong because maternal weight-related factors do not affect the level of AFP in the maternal blood.

However, they can affect the interpretation of the AFP test results, as the test needs to be adjusted for maternal weight, age, ethnicity, and gestational age.

Choice D is wrong because fetal demise (death) can also cause high levels of AFP in the maternal blood, as the AFP from the dead fetus can leak into the amniotic fluid and then into the maternal blood.

Normal ranges of AFP in pregnant women vary depending on the gestational age and the method of measurement.

Generally, normal levels of AFP are below 10 ng/ml in nonpregnant adults and below 2.5 MoM in pregnant women.

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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?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client is scheduled for an abdominal ultrasound in two weeks to assess fetal growth and development during pregnancy. Which of these statements made by the client indicates that further teaching is needed?

Correct Answer is B

Explanation

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Correct Answer is B

Explanation

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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?

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A nurse is caring for a patient who had an amniocentesis performed at 16 weeks gestation and reports cramping and vaginal bleeding 24 hours later which action should be taken first?

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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?