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

Choice A is wrong because it describes a transabdominal CVS procedure, which involves a needle instead of a catheter.

Choice C is wrong because it describes a procedure that is not used for CVS.A needle inserted through the cervix could damage the fetal membranes or cause bleeding.

Choice D is wrong because it describes a procedure that is not possible.A catheter cannot be inserted through the abdomen and uterus into the placenta.

Normal ranges for CVS are not applicable as it is a diagnostic test, not a screening test.

It provides a definitive result of whether the fetus has a chromosomal abnormality or a genetic disorder.CVS is usually done between 10 and 13+6 weeks of pregnancy.

A. “The baby’s heart beat is audible by a Doppler stethoscope at 12 weeks of pregnancy.” B. “The baby’s sex can be determined by ultrasound at 8 weeks of pregnancy.” C. “The baby’s lungs are fully mature by 24 weeks of pregnancy.” D. “The baby’s eyes open and close by 16 weeks of pregnancy.”

Correct Answer is A

Explanation

The baby’s heart beat is audible by a Doppler stethoscope at 12 weeks of pregnancy.

This is a device that uses sound waves to create an image of the baby’s heart and measure its rate and rhythm.

Some possible explanations for the other choices are:

Choice B is wrong because the baby’s sex can not be determined by ultrasound at 8 weeks of pregnancy.

The external genitalia are not fully developed until around 14 to 16 weeks of pregnancy.

Even then, the accuracy of ultrasound depends on factors such as the position of the baby, the quality of the equipment, and the skill of the sonographer.

Choice C is wrong because the baby’s lungs are not fully mature by 24 weeks of pregnancy.

The lungs are one of the last organs to develop in the fetus and they continue to grow and mature until near term.

The production of surfactant, a substance that helps the lungs expand and prevent collapse, begins around 24 weeks but is not sufficient until around 34 to 36 weeks.

Choice D is wrong because the baby’s eyes do not open and close by 16 weeks of pregnancy.

The eyelids are fused together until around 26 to 28 weeks of pregnancy, when they start to open and close periodically.

The baby can also respond to light and dark stimuli around this time.

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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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Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who is scheduled for chorionic villus sampling (CVS). Which of the following statements should indicate to the nurse that the client understands the procedure?

Correct Answer is B

Explanation

A nurse is teaching about fetal development to a group of clients in the antenatal clinic. Which of the following statements should the nurse include in the teaching?

Correct Answer is A

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?