A nurse is reviewing the results of a Contraction Stress Test (CST) with a pregnant client.
What does an equivocal CST indicate?
Late decelerations of the FHR with less than 50% of contractions.
Late decelerations of the FHR with at least 50% of contractions.
No late decelerations of the FHR during contractions.
Variable decelerations of the FHR with or without contractions.
The Correct Answer is A
An equivocal CST indicates late decelerations of the FHR with less than 50% of contractions.
This means that the fetus may have some degree of hypoxia or distress, but not enough to warrant immediate delivery.
An equivocal CST may also result from hyperstimulation of the uterus, which can cause excessive contractions and reduce blood flow to the placenta.
Choice B is wrong because late decelerations of the FHR with at least 50% of contractions is a positive CST, which indicates a high risk of fetal death due to hypoxia and is a contraindication to labor.
Choice C is wrong because no late decelerations of the FHR during contractions is a negative CST, which indicates a good fetal wellbeing and tolerance of labor.
Choice D is wrong because variable decelerations of the FHR with or without contractions are not related to uterine activity and may indicate cord compression or other fetal problems.
Variable decelerations are not used to interpret CST results.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The correct answer is choice B. Monitor fetal heart rate.
This is because cramping and vaginal bleeding after amniocentesis are signs of possible complications such as miscarriage, preterm labor, or injury to the fetus.
Monitoring fetal heart rate can help assess the well-being of the fetus and detect any signs of distress.
Choice A is wrong because administering Rho(D) immunoglobulin is only necessary if the mother has Rh-negative blood and the baby has Rh-positive blood, which can cause Rh sensitization.
This is not given routinely to all women who have amniocentesis.
Choice C is wrong because assessing maternal vital signs is not the first priority when there is a risk of fetal compromise.
Maternal vital signs can be affected by many factors and are not specific indicators of fetal health.
Choice D is wrong because obtaining an order for an ultrasound exam is not the first action to take.
An ultrasound exam can help confirm the diagnosis of complications such as placental abruption or fetal demise, but it requires time and equipment that might delay immediate intervention.
Monitoring fetal heart rate can be done quickly and easily at the bedside.
Correct Answer is B
Explanation
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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