The nurse in the emergency room is reviewing the health record of a client who is being evaluated for Graves' disease. The nurse should identify which of the following laboratory results is an expected finding?
Decreased thyrotropin receptor antibodies
Decreased free thyroxine index
Decreased triiodothyronine
Decreased thyroid-stimulating hormone (TSH)
The Correct Answer is D
A. Decreased thyrotropin receptor antibodies: Graves' disease is characterized by the presence of thyrotropin receptor antibodies, so they are typically increased, not decreased.
B. Decreased free thyroxine index: Graves' disease typically results in increased levels of thyroid hormones, not decreased.
C. Decreased triiodothyronine: T3 levels may be elevated in Graves' disease due to increased thyroid hormone production.
D. Decreased thyroid-stimulating hormone (TSH): Graves' disease causes excessive thyroid hormone production, leading to suppressed TSH levels. TSH is typically low in hyperthyroidism because the thyroid gland is overactive and not being stimulated by the pituitary gland.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Decreased thyrotropin receptor antibodies: Graves' disease is characterized by the presence of thyrotropin receptor antibodies, so they are typically increased, not decreased.
B. Decreased free thyroxine index: Graves' disease typically results in increased levels of thyroid hormones, not decreased.
C. Decreased triiodothyronine: T3 levels may be elevated in Graves' disease due to increased thyroid hormone production.
D. Decreased thyroid-stimulating hormone (TSH): Graves' disease causes excessive thyroid hormone production, leading to suppressed TSH levels. TSH is typically low in hyperthyroidism because the thyroid gland is overactive and not being stimulated by the pituitary gland.
Correct Answer is B
Explanation
A. Hypotension: Hyperthyroidism typically causes increased cardiac output and can lead to normal or elevated blood pressure, not hypotension.
B. Tachycardia. Elevated thyroid hormones increase metabolic rate and sympathetic nervous system activity, leading to tachycardia.
C. Slow respiratory rate: There is no direct effect of hyperthyroidism on respiratory rate.
D. Decreased body temperature: Hyperthyroidism is associated with increased metabolism, which can lead to heat intolerance and increased body temperature, not decreased.
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