A pregnant client is at the prenatal clinic for a fetal nuchal translucency test.
What does the nurse understand about this test?
It’s a screening test for trisomy 21.
It’s a diagnostic test for neural tube defects.
It’s only available in the second trimester.
It’s considered normal when greater than 3mm.
It’s considered normal when greater than 3mm.
The Correct Answer is A
Choice A rationale:
Trisomy 21, also known as Down syndrome, is a genetic condition caused by the presence of an extra copy of chromosome 21.
The nuchal translucency test (NT) is a non-invasive ultrasound screening test that measures the thickness of the fluid-filled space at the back of a developing baby's neck.
Evidence suggests that fetuses with Down syndrome tend to have increased fluid accumulation in this area, resulting in a larger-than-average nuchal translucency measurement.
Therefore, an increased NT measurement can be a marker for an increased risk of Down syndrome.
It's important to emphasize that the NT test is a screening tool, not a diagnostic test.
This means it can only indicate an increased risk of Down syndrome; it cannot definitively diagnose the condition.
To confirm a diagnosis, further testing, such as chorionic villus sampling (CVS) or amniocentesis, is required.
Choice B rationale:
Neural tube defects (NTDs) are birth defects that affect the brain, spine, or spinal cord.
The most common NTDs are spina bifida and anencephaly.
The NT test is not a diagnostic test for NTDs, although it might detect some cases of open spina bifida.
However, it's not specifically designed for this purpose, and other tests, such as alpha-fetoprotein (AFP) screening or detailed ultrasound, are more reliable for diagnosing NTDs.
Choice C rationale:
The NT test is typically performed in the first trimester of pregnancy, between 11 and 14 weeks gestation.
It's not available in the second trimester because the nuchal translucency measurement becomes less reliable after this point in pregnancy.
Choice D rationale:
A nuchal translucency measurement of 3mm or less is generally considered normal.
Measurements greater than 3mm are associated with an increased risk of Down syndrome and other chromosomal abnormalities.
The higher the measurement, the greater the risk.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
This response is incorrect because newborn screening tests do not determine blood type. Blood type is typically determined through a separate blood test, such as an ABO and Rh typing test.
While knowing a baby's blood type is important for medical reasons, it's not the primary purpose of newborn screening.
Focusing solely on blood type could mislead parents about the broader scope of conditions that newborn screening aims to identify.
Choice B rationale:
This response is incorrect because newborn screening tests are not diagnostic tests. They are screening tests, which means they identify babies who may be at risk for certain diseases, but they do not confirm whether or not a baby actually has a disease.
Diagnostic tests are typically more specific and are performed after a screening test has indicated a potential problem.
It's crucial to clarify the distinction between screening and diagnosis to avoid causing undue alarm or confusion for parents.
Choice C rationale:
This is the correct response. It accurately explains that newborn screening tests are routine procedures that are performed to detect babies who may be at risk for developing certain diseases.
The emphasis on "risk" is important because it highlights that a positive screening result does not necessarily mean that a baby has a disease, but rather that further testing is needed to confirm the diagnosis.
This response also avoids making assumptions about the parents' carrier status, which is a sensitive topic that should be addressed with care and discretion.
Choice D rationale:
This response is incorrect because it assumes that the parents are carriers for a disease, which may not be the case.
Even if the parents are carriers, newborn screening tests are not designed to specifically determine whether a disease has been passed down from parent to child.
Making such assumptions could create unnecessary anxiety or confusion for parents, and it's important to provide information that is accurate and relevant to their specific situation.
Correct Answer is A
Explanation
Choice A rationale:
Restriction of movement is not a necessary requirement following IV opioid administration during labor. While some healthcare providers may encourage laboring individuals to rest after receiving pain medication, it is not mandatory to remain in bed.
In fact, remaining upright and mobile can often be beneficial during labor. Movement can help encourage fetal descent, improve circulation, and potentially even shorten labor duration.
It's essential to educate clients about the benefits of staying active during labor, even after receiving pain medication. This can empower them to make informed choices about their comfort and positioning during the birthing process.
Choice B rationale:
This statement is accurate. IV opioids can cross the placenta and potentially affect the fetal heart rate.
It's crucial for clients to be aware of this potential effect so that they can understand the importance of fetal monitoring during labor. Healthcare providers will closely monitor the baby's heart rate to ensure it remains within a normal range.
Choice C rationale:
This statement is also accurate. If a baby is born too soon after the mother receives IV opioids, there is a risk of respiratory depression.
This is because the opioids can cross the placenta and affect the baby's breathing. Healthcare providers are trained to manage this risk and will take appropriate measures to ensure the baby's well-being, such as providing respiratory support if needed.
Choice D rationale:
This statement is correct. IV opioids are primarily used to relieve pain during labor, not to decrease the frequency of contractions.
While they may have some mild effects on contraction strength or duration, their primary purpose is to provide pain relief. It's important for clients to understand this distinction so that they have realistic expectations about the medication's effects.
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