A parent brings a 2-week-old infant to a clinic for a phenylketonuria rescreening blood test. The test indicates a serum phenylalanine level of 1 mg/dL (60.5 mcmol/L). The nurse reviews this result and makes which interpretation?
It is inconclusive
it is negative
it requires rescreening at age 6 weeks.
It is positive
The Correct Answer is B
A. It is inconclusive
Explanation: A serum phenylalanine level within the normal range is considered conclusive in ruling out phenylketonuria. Inconclusive results typically occur when there are issues with the sample or testing process.
B. It is negative
Explanation:
A serum phenylalanine level of 1 mg/dL (60.5 mcmol/L) in a 2-week-old infant is within the normal range. In the context of phenylketonuria (PKU) screening, a "negative" result means that the phenylalanine levels are within the expected range, and there is no evidence of phenylketonuria.
C. It requires rescreening at age 6 weeks.
Explanation: If the initial screening result is within the normal range, rescreening at age 6 weeks may not be necessary for phenylketonuria. The timing and need for rescreening may vary based on local protocols and individual patient factors.
D. It is positive
Explanation: A positive result for phenylketonuria would indicate that the serum phenylalanine levels are elevated, suggesting a potential diagnosis of PKU. In this case, the result is negative, meaning there is no evidence of PKU.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","D","E"]
Explanation
A. Need for increased caloric intake:
Incorrect: While toddlers may have specific nutritional needs, it is important to focus on a balanced diet rather than emphasizing increased caloric intake. The emphasis should be on providing nutritious and age-appropriate foods.
B. How to encourage cooperative play:
Correct Answer: Encouraging cooperative play is important for a toddler's social development. It involves teaching sharing, taking turns, and interacting with other children.
C. Management of tantrums:
Incorrect: While guidance on managing tantrums can be part of parenting education, it may not be the primary focus in health promotion teaching. The emphasis is typically on positive guidance, effective communication, and setting age-appropriate limits.
D. Dental care:
Correct Answer: Dental care is crucial for toddlers to promote oral health. The nurse should provide information on proper oral hygiene practices, including tooth brushing, and discuss the importance of regular dental check-ups.
E. How to establish trust:
Correct Answer: Establishing trust is a vital aspect of toddler development. The nurse can provide guidance on building a secure and trusting relationship between the child and parents.
Correct Answer is D
Explanation
A. Sausage-shaped mass palpated in the upper right abdominal quadrant.
Explanation: A sausage-shaped mass in the upper right abdominal quadrant is more indicative of Hirschsprung's disease, not imperforate anus. In Hirschsprung's disease, there is a lack of ganglion cells in the rectum, leading to obstruction and a palpable mass.
B. The passage of currant jelly-like stools.
Explanation: The passage of currant jelly-like stools is characteristic of intussusception, a condition where one portion of the intestine telescopes into another. It is not associated with imperforate anus.
C. Bile-stained fecal emesis.
Explanation: Bile-stained fecal emesis suggests a possible intestinal obstruction or other gastrointestinal issue, but it is not a specific manifestation of imperforate anus. Imperforate anus is primarily characterized by the absence of a normal anal opening.
D. Failure to pass meconium stool in the first 24 hours after birth.
Explanation:
Imperforate anus refers to a congenital condition in which the opening to the anus is absent or improperly formed. One of the clinical manifestations is the failure to pass meconium stool within the first 24 hours after birth. Meconium is the thick, sticky, greenish-black substance that constitutes a newborn's first stools. The absence of meconium passage suggests a potential obstruction.
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