A nurse is discussing the factors that can affect Alpha-fetoprotein Test (AFP) results with a pregnant client.
Which factor should the nurse mention?
Maternal weight.
Fetal heart rate.
Gestational age.
Placental function.
The Correct Answer is C
The level of AFP in a pregnant woman’s blood depends on how far along she is in her pregnancy.
AFP levels are normally high in the early weeks of pregnancy and then decline as the pregnancy progresses.
If the AFP level is too high or too low for the gestational age, it may indicate a problem with the baby’s development.
Choice A is wrong because maternal weight does not affect AFP levels.
Choice B is wrong because fetal heart rate does not affect AFP levels.
Choice D is wrong because the placental function does not affect AFP levels directly, but it may affect the levels of other hormones that are measured along with AFP in a quad screen.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
This is because a nuchal translucency ultrasound measures the amount of fluid behind the baby’s neck in the first trimester of pregnancy, which can indicate the risk of having a chromosomal condition like Down syndrome.
Some possible explanations for the other choices are:
Choice A is wrong because fetal growth and development are not directly related to the nuchal translucency measurement.
Fetal growth and development are assessed by other parameters such as crown-rump length, biparietal diameter, abdominal circumference, etc.
Choice B is wrong because blood flow in the umbilical cord is not measured by the nuchal translucency ultrasound.
Blood flow in the umbilical cord is assessed by Doppler ultrasound, which evaluates the resistance and velocity of blood flow in the umbilical artery and vein.
Choice D is wrong because structural abnormalities in the baby’s organs are not detected by the nuchal translucency ultrasound.
Structural abnormalities in the baby’s organs are diagnosed by a detailed anatomy scan, which is usually performed in the second trimester of pregnancy.
The normal range for nuchal translucency is between 1 mm and 3 mm.
A measurement above 3 mm is considered increased and may indicate a higher risk of chromosomal or genetic conditions.
However, a nuchal translucency ultrasound is a screening test and not a diagnostic test, so it does not confirm or rule out any condition.
It only provides a probability based on statistical calculations.
Therefore, further testing may be recommended if the nuchal translucency measurement is increased or if other risk factors are present.
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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