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

Answer and Explanation

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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Correct Answer is A

Explanation

A. Orthopnea
Explanation:
Orthopnea refers to difficulty breathing that occurs when lying flat. In heart failure, fluid may accumulate in the lungs, leading to respiratory distress when the child is in a supine position. Orthopnea is a common symptom of heart failure in both adults and children.
B. Bradycardia
Explanation: Bradycardia (slow heart rate) is not a typical finding in heart failure. Heart failure often leads to compensatory mechanisms, including an increased heart rate (tachycardia), to maintain cardiac output.
C. Weight loss
Explanation: Weight loss is not a typical finding in heart failure. In fact, heart failure in children may lead to fluid retention and weight gain rather than weight loss.
D. Increased urine output
Explanation: Heart failure in toddlers is more likely to be associated with decreased urine output rather than increased urine output. Reduced cardiac output can result in decreased blood flow to the kidneys, leading to decreased urine production and potential fluid retention. Increased urine output is not a characteristic finding in heart failure.

A. "Newborns are abdominal breathers." B. "Activity will increase the respiratory rate." C. "Newborns do not expand their lungs fully with each respiration." D. "The rate and rhythm of breath are irregular in newborns."

Correct Answer is D

Explanation

A. "Newborns are abdominal breathers."
Explanation: While it is true that newborns primarily use their diaphragms for breathing (abdominal breathing), this statement does not specifically address why the respiratory rate should be counted for a full minute.
B. "Activity will increase the respiratory rate."
Explanation: This statement acknowledges that activity can influence the respiratory rate but does not specifically address the need to count for a full minute to capture the irregular patterns.
C. "Newborns do not expand their lungs fully with each respiration."
Explanation: This statement highlights a characteristic of newborn respiratory physiology but does not specifically explain the importance of counting the respiratory rate for a full minute.
D. "The rate and rhythm of breath are irregular in newborns."
Explanation:
Newborns often have irregular breathing patterns, and counting the respiratory rate for a full minute helps capture the variations in rate and rhythm accurately. Newborns may experience periods of rapid breathing followed by periods of slower breathing, and their respiratory patterns can be influenced by sleep-wake cycles, feeding, and other factors. Counting for a full minute provides a more comprehensive and representative assessment of the newborn's respiratory status.

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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?

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Naxlex Comprehensive Predictor Exams

A nurse is assessing a toddler who has heart failure. Which of the following findings should the nurse expect?

Correct Answer is A

Explanation

A nurse is teaching an assistive personnel to measure a newborn's respiratory rate. Which of the following statements indicates an understanding of why the respiratory rate should be counted for a complete minute?

Correct Answer is D

Explanation

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