A nurse is collecting a blood phenylketonuria (PKU) test for a newborn prior to discharge.The newborn's guardian asks the nurse what a positive PKU test would mean.
Which of the following statements should the nurse make?
A positive finding indicates the inability to metabolize galactose.
A positive finding indicates the infant will have a slow metabolism.
A positive finding indicates an inability to metabolize certain amino acids.
A positive finding indicates an increased risk for neurological anomalies.
The Correct Answer is C
Choice A rationale
A positive finding for galactosemia, not PKU, indicates the inability to metabolize galactose. Galactosemia is a different metabolic disorder that requires a separate dietary intervention.
Choice B rationale
A positive PKU test does not indicate slow metabolism. Instead, it signifies the inability to metabolize phenylalanine, an amino acid.
Choice C rationale
Phenylketonuria (PKU) is a genetic disorder that leads to the inability to break down the amino acid phenylalanine. Without proper management, it can accumulate in the body and cause brain damage and other health issues.
Choice D rationale
A positive PKU test is not directly linked to an increased risk for neurological anomalies in general. The specific issue in PKU is the inability to metabolize certain amino acids, primarily phenylalanine, which can cause neurological damage if untreated. .
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Leukorrhea is a common and normal occurrence in pregnancy due to increased estrogen production and greater blood flow to the vaginal area. It is usually a thin, white discharge and not a cause for concern unless accompanied by itching, burning, or an unusual odor.
Choice B rationale
Excessive salivation, also known as ptyalism, can occur during pregnancy, particularly in the first trimester. It is linked to hormonal changes and is not typically harmful, though it may be uncomfortable for the patient.
Choice C rationale
Darkening of the skin on the face, known as melasma or chloasma, is common during pregnancy and is due to increased pigmentation from hormonal changes. It typically resolves postpartum and is not harmful.
Choice D rationale
Epigastric pain in a pregnant client at 33 weeks gestation can be a sign of preeclampsia, a serious condition characterized by high blood pressure and damage to other organs. It requires immediate medical attention to prevent complications for both the mother and baby.
Correct Answer is D
Explanation
Choice A rationale
Taking iron supplements with milk is not advised because calcium in milk can interfere with the absorption of iron, reducing its effectiveness.
Choice B rationale
Doubling the dose of iron supplements if a dose is missed is not recommended because it can cause gastrointestinal issues and toxicity. It's better to just continue with the regular dosing schedule.
Choice C rationale
Consuming 29 grams of fiber daily is a good practice for overall health, but it does not directly aid in iron absorption. Fiber can actually bind to iron and decrease its absorption in the intestines.
Choice D rationale
Vitamin C enhances the absorption of non-heme iron (found in supplements) by converting it into a more absorbable form. Taking vitamin C with iron supplements increases their effectiveness, making this statement correct.
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