The nurse is assessing a newborn after delivery and observes the following: epicanthal folds, heart murmur, low-set ears, and poor muscle tone. What does the nurse suspect?
“Trisomy 21”
“Cystic Fibrosis”
“Tay-Sachs disease”
“Marfan syndrome”
The Correct Answer is A
Choice A rationale:
Epicanthal folds: These are skin folds that cover the inner corners of the eyes. They are a common characteristic of Trisomy 21, also known as Down syndrome.
Heart murmur: A heart murmur is an abnormal sound heard during a heartbeat. It can be caused by a variety of conditions, including Trisomy 21. Approximately half of babies with Down syndrome have a heart defect.
Low-set ears: This means that the ears are positioned lower on the head than usual. This is another common characteristic of Trisomy 21.
Poor muscle tone: This means that the muscles are weak and floppy. This is also a common characteristic of Trisomy 21.
Choice B rationale:
Cystic fibrosis: This is a genetic disorder that affects the lungs and digestive system. It is not typically associated with the physical features observed in this newborn. Newborns with cystic fibrosis typically present with meconium ileus, failure to thrive, and recurrent respiratory infections.
Choice C rationale:
Tay-Sachs disease: This is a rare genetic disorder that affects the nervous system. It is not typically associated with the physical features observed in this newborn. Infants with Tay-Sachs disease typically appear normal at birth, with symptoms developing around 6 months of age. These symptoms can include developmental delays, muscle weakness, seizures, and blindness.
Choice D rationale:
Marfan syndrome: This is a genetic disorder that affects the connective tissue. It is not typically associated with the physical features observed in this newborn. Individuals with Marfan syndrome typically have tall stature, long limbs, and hypermobile joints. They may also have eye problems, such as lens dislocation, and heart problems, such as aortic aneurysm.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Drug/alcohol use: While substance abuse during pregnancy can lead to adverse outcomes such as preterm labor, fetal growth restriction, and birth defects, it is not considered a primary factor in determining high-risk status for this patient. The specific substances involved (cocaine and alcohol) are indeed associated with risks, but they are not as significant as other factors in this case.
Age: The patient's age of 24 is not considered a high-risk factor for pregnancy. Advanced maternal age (typically defined as 35 years or older) is associated with increased risks for chromosomal abnormalities and other complications, but this patient falls below that age threshold.
Family history: Family history of diabetes mellitus, cancer, and neural tube defects can be relevant to pregnancy risk, but in this case, other factors outweigh their significance.
Choice B rationale:
Blood pressure: The patient's blood pressure of 108/70 mm Hg is within the normal range and does not contribute to highrisk categorization. High blood pressure (hypertension) during pregnancy can lead to preeclampsia and other complications, but this patient does not present with hypertension.
Age: As explained in Choice A, the patient's age is not a high-risk factor.
BMI: A BMI of 17 is considered underweight, which can increase the risk of certain pregnancy complications such as preterm birth and low birth weight. However, in this case, other factors are more significant in determining high-risk status.
Choice C rationale:
Family history: The patient's family history of a neural tube defect (NTD) in a close relative is a significant risk factor for NTDs in her own pregnancy. NTDs are serious birth defects that affect the brain and spinal cord, and they can have lifelong implications for the child. This factor alone warrants a high-risk categorization.
BMI: The patient's underweight BMI of 17 further contributes to her high-risk status, as it can increase the likelihood of certain complications as mentioned earlier.
Drug/alcohol abuse: The patient's admission of cocaine and alcohol use, even if occasional, is a concerning factor for pregnancy. Cocaine, in particular, is a potent vasoconstrictor that can negatively impact fetal growth and development. Alcohol consumption during pregnancy can lead to fetal alcohol spectrum disorders (FASDs), which can cause a range of physical, cognitive, and behavioral problems.
Choice D rationale:
Age: As explained previously, the patient's age is not a high-risk factor.
BMI: The patient's BMI is a contributing factor, but not the most significant one in this case.
Family history: The patient's family history is relevant, but the presence of a neural tube defect in a close relative is the most significant aspect of her family history in terms of pregnancy risk.
Correct Answer is D
Explanation
Choice A rationale:
Incorrect. The quad screen test does not examine fetal DNA to determine gender. That is the role of other tests, such as amniocentesis or chorionic villus sampling (CVS).
Gender determination is not a primary objective of the quad screen test.
Focusing on gender unnecessarily narrows the scope of the test's potential findings.
Choice B rationale:
Incorrect. The quad screen test does not use fetal tissue. It is a non-invasive blood test that measures levels of four substances in the mother's blood: alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), unconjugated estriol (uE3), and inhibin A.
Fetal tissue sampling is more invasive and carries risks, while the quad screen is a safer alternative.
Clarifying the non-invasive nature of the test is crucial for informed consent and patient understanding.
Choice C rationale:
Incorrect. While AFP levels can be affected by maternal liver function, that is not the primary focus of the quad screen test.
Liver function tests are specifically designed to assess liver health, and they are not part of the quad screen panel.
Distinguishing between liver function assessment and AFP's role in screening for fetal anomalies is essential for accurate interpretation.
Choice D rationale:
Correct. The quad screen test measures levels of AFP, hCG, uE3, and inhibin A in the mother's blood. These substances can provide information about the risk of certain fetal chromosomal abnormalities and neural tube defects.
Elevated AFP levels can indicate an increased risk for neural tube defects such as spina bifida or anencephaly.
Low AFP levels can be associated with Down syndrome or other chromosomal abnormalities.
Understanding the specific disorders that can be indicated by AFP levels is crucial for patient counseling and further testing decisions.
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