A nurse is preparing to screen a newborn for phenylketonuria. The nurse should inform the parents that this screening allows for early detection and intervention to prevent the development of which of the following conditions?
Hypothyroidism
Growth restriction
Sickle cell anemia
Hypoglycemia
The Correct Answer is A
A. Hypothyroidism: Phenylketonuria (PKU) screening helps detect elevated phenylalanine levels, which, if untreated, can lead to irreversible intellectual disability. Early dietary intervention prevents neurodevelopmental delays, a hallmark consequence of untreated PKU that mimics effects seen in congenital hypothyroidism.
B. Growth restriction: While PKU may indirectly affect growth if untreated, the primary concern is neurological damage, not intrauterine or postnatal growth restriction, which is influenced by multiple other factors.
C. Sickle cell anemia: Sickle cell anemia is a genetic blood disorder involving abnormal hemoglobin structure. It is screened for separately from PKU and is unrelated to phenylalanine metabolism.
D. Hypoglycemia: Hypoglycemia in newborns typically results from conditions like maternal diabetes or endocrine disorders. It is not a complication of phenylalanine metabolism and is unrelated to PKU screening.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Initiate a low-protein diet: A low-protein diet is inappropriate for burn clients, who require increased protein to support wound healing, tissue regeneration, and immune function. Protein needs are significantly elevated in clients with burns.
B. Provide a vitamin C supplement: Vitamin C supports collagen synthesis, promotes wound healing, and enhances immune function. Clients with partial-thickness burns benefit from supplementation to aid skin repair and recovery.
C. Administer a potassium-sparing diuretic: Diuretics are generally avoided in the early stages of burn care due to fluid shifts and risk of hypovolemia. Fluid resuscitation is prioritized to stabilize hemodynamics and maintain organ perfusion.
D. Limit zinc intake: Zinc plays a critical role in tissue healing and immune support. Limiting zinc would be counterproductive; burn clients often require additional zinc to meet increased metabolic demands.
Correct Answer is A
Explanation
A. "I do not need a pump to administer my feedings. Bolus feedings are delivered by gravity or syringe and do not require an infusion pump. They are given intermittently over a short period of time, usually in larger volumes than continuous feedings. This method is often used in clients with intact gastric function and allows more flexibility in daily routine.
B. "I should administer the formula at a cold temperature." Administering formula at a cold temperature can cause gastric discomfort, cramping, or diarrhea. Enteral formula should be administered at room temperature to promote better tolerance and reduce gastrointestinal irritation.
C. "I should advance the rate of my feedings slowly." Advancing the rate of feedings gradually applies more to continuous or cyclic feedings when transitioning a client to full nutritional intake. In bolus feeding, the rate is usually fixed per feeding and is not increased over time unless prescribed otherwise.
D. "I will administer my feedings at a constant rate over 24 hours."Administering feedings at a constant rate over 24 hours describes continuous enteral nutrition, not bolus feeding. Bolus feeding is typically done in shorter sessions several times a day and does not involve a steady infusion over a full day.
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