A nurse is educating a pregnant client about the Contraction Stress Test (CST).
Which statement accurately describes a negative CST?
No contractions were induced during the test.
Late decelerations of the FHR were observed with at least 50% of contractions.
The FHR remained stable throughout the test.
The client experienced mild uterine cramping during the tes.
The Correct Answer is C
This means that the baby’s heart rate did not slow down after the contractions induced by oxytocin, which is a sign of normal fetal well-being.
A negative CST is normal and desirable.
Choice A is wrong because no contractions were induced during the test.
This means that the test was inconclusive and could not assess the baby’s response to stress.
Choice B is wrong because late decelerations of the FHR were observed with at least 50% of contractions.
This means that the baby’s heart rate slowed down and stayed slow after the contractions, which is a sign of fetal distress and hypoxia.
A positive CST is abnormal and concerning.
Choice D is wrong because the client experienced mild uterine cramping during the test.
This is not a relevant factor for interpreting the CST results, which depend on the FHR patterns.
Uterine cramping can be a side effect of oxytocin administration or nipple stimulation.
Nursing Test Bank
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 A
Explanation
A contraction stress test (CST) is performed near the end of pregnancy to determine how well the fetus will cope with the contractions of childbirth.
The aim is to induce contractions and monitor the fetus to check for heart rate abnormalities using a cardiotocograph.
A normal heartbeat is a good sign that the fetus will be healthy during labor.
Choice B is wrong because a CST does not measure maternal blood pressure.
Choice C is wrong because a CST does not assess placental function directly.
Choice D is wrong because a CST does not measure amniotic fluid volume.
Normal ranges for fetal heart rate are between 110 and 160 beats per minute.
Normal ranges for uterine contractions are between 2 and 5 contractions in 10 minutes, lasting less than 90 seconds each.
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