单选题 Which laboratory test results would the nurse expect to find in a client diagnosed with Hashimoto's thyroiditis?
A. Thyroxine (T₄), 22μg/dL; triiodothyronine (T₃), 320ng/dL; thyroid-stimulating hormone (TSH) undetectable.
B. T₄, 22μg/dL; T₃, 200ng/dL; TSH,0.1μIU/mL.
C. T₄, 2μg/dL; T₃, 200ng/dL; TSH,5.9μIU/mL.
D. T₄, 2μg/dL; T₃, 35ng/dL; TSH,45μIU/mL.

【正确答案】 D

【答案解析】Normal thyroid function tests are as follows: T₄, 5 to 12 μg/dL; T₃, 65 to 195 μg/dL; TSH 0.3 to 5.4μIU/mL. With Hashimoto's thyroiditis, T₄ and T₃ levels are typically subnormal and TSH is elevated. With primary hyperthyroidism, T₄ and T₃ levels are elevated and TSH is subnormal (options A and B). With hypothyroidism, T₄ is subnormal and T₃ and TSH levels are elevated (option C).