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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Cranberry juice
Explanation: Acidic and citrus juices, including cranberry and orange juice, should be avoided in the immediate postoperative period as they can be irritating to the surgical site and may increase the risk of bleeding.
B. Crushed ice
Explanation:
After a tonsillectomy, it's important to provide cold and clear fluids to soothe the throat and prevent bleeding. Crushed ice is a suitable option as it helps keep the throat cool and provides hydration without irritating the surgical site. Cold liquids can help minimize swelling and provide comfort.
C. Vanilla milkshake
Explanation: While milkshakes may be appealing, dairy products can coat the throat and may not be recommended immediately after surgery. Additionally, it's crucial to avoid using straws, as sucking can increase the risk of bleeding.
D. Orange juice
Explanation: As mentioned earlier, citrus juices like orange juice can be irritating to the surgical site and are not recommended in the early postoperative period after a tonsillectomy. It's essential to choose clear and non-acidic fluids to support healing and prevent complications.
Correct Answer is B
Explanation
A. "I will limit my child's fluid intake."
Incorrect: Limiting fluid intake is not typically recommended for children with CF. Maintaining hydration is important, especially since individuals with CF may have increased salt losses in sweat.
B. "We will give our child pancreatic enzymes with snacks and meals."
Correct Answer: This response indicates an understanding of the importance of giving pancreatic enzymes to assist with digestion, as individuals with CF often have pancreatic insufficiency. Pancreatic enzymes help in the absorption of nutrients from food.
C. "We will restrict the amount of salt in our child's food."
Incorrect: While it's true that individuals with CF may need to increase their salt intake due to increased salt losses in sweat, this response suggests restricting salt, which is not in line with the nutritional needs of a child with CF.
D. "I will prepare low-fat meals with limited protein for my child."
Incorrect: Children with CF often need a higher calorie intake, including healthy fats and adequate protein. Restricting fat and protein is not in line with the nutritional needs of a child with CF.
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