A newborn is admitted to the pediatric unit to rule out congenital hypothyroidism. Which of the following findings would the nurse expect if this diagnosis is confirmed?
Bradycardia, constipation, and hypotonia
Elevated serum T3 and T4
Tachycardia, diarrhea, and tremors
Decreased thyroid stimulating hormone (TSH)
The Correct Answer is A
Rationale:
A. Bradycardia, constipation, and hypotonia are common symptoms associated with congenital hypothyroidism due to the reduced metabolism that results from decreased thyroid hormone levels.
B. Elevated serum T3 and T4 would not be expected in congenital hypothyroidism; these levels are typically low.
C. Tachycardia, diarrhea, and tremors are more indicative of hyperthyroidism, not hypothyroidism.
D. In congenital hypothyroidism, the thyroid-stimulating hormone (TSH) is typically elevated as the body attempts to stimulate the thyroid gland to produce more hormones.
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Correct Answer is D
Explanation
Rationale:
A. While reviewing the CBC is important, it is not the priority.
B. Assessing joint pain is necessary for managing symptoms, but it is not the most critical initial action.
C. Evaluating the erythematous rash is part of the assessment, but it does not take precedence.
D. Auscultating the heart is the priority because acute rheumatic fever can lead to carditis, which can cause significant and potentially life-threatening heart complications. Early detection of abnormal heart sounds is crucial.
Correct Answer is B
Explanation
Rationale:
A. PKU is typically diagnosed through a blood test, not a urine test. The blood test measures phenylalanine levels, which are elevated in PKU.
B. Untreated PKU can lead to severe cognitive deficits and developmental delays due to the accumulation of phenylalanine, which is toxic to the brain. Early detection and treatment can prevent these outcomes.
C. In PKU, the urine does not typically contain high levels of phenyl pyruvic acid; it is the blood levels of phenylalanine that are elevated.
D. The effects of PKU are not reversible; however, with early and consistent treatment, such as a strict low-phenylalanine diet, the symptoms can be managed effectively.