A nurse is caring for a client who is scheduled for chorionic villus sampling (CVS).

Which of the following statements by the client indicates an understanding of the procedure?

This is because 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.There are two types of CVS procedures: transcervical and transabdominal.In the transcervical procedure, a catheter is inserted through the cervix into the placenta to obtain the tissue sample.In the transabdominal procedure, a needle is inserted through the abdomen and uterus into the placenta to obtain the tissue sample.

Choice A is wrong because it describes the transabdominal procedure, not the transcervical one.

Choice B is wrong because it describes the transabdominal procedure, but with a catheter instead of a needle.

Choice D is wrong because it describes the transcervical procedure, but with a needle instead of a catheter.

The normal ranges for CVS are between 10 and 12+6 weeks of gestation.CVS does not provide information on neural tube defects, so 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.

The correct answer is choice B. Results are usually available within 24 hours.This is known as the rapid CVS result.A more detailed set of CVS results will be available within 10 to 14 days, but may take up to 3 weeks in some cases.

Choice A is wrong because results are not usually available within 10 to 14 days.

This is the time frame for the final result, not the preliminary one.

Choice C is wrong because results are not usually available within 7 days.

This is too long for the rapid result and too short for the final result.

Choice D is wrong because results are not usually available within 30 days.

This is much longer than the usual time frame for both the rapid and the final result.