RN Pediatric NCLEX Questions Related

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When preparing to obtain a neonatal screening test for phenylketonuria (PKU), the neonate must have received which of the following to ensure reliable results?

  • A. A feeding of an iron-rich formula.
  • B. Nothing by mouth for 4 hours before the test.
  • C. Initial formula or breast milk at least 24 hours before the test.
  • D. A feeding of glucose water.
Correct Answer: C

Rationale: PKU screening requires protein intake (breast milk or formula) for 24 hours to detect elevated phenylalanine levels. Iron-rich formula, fasting, or glucose water are inadequate.