Difficulty: Medium
Average Score: 87%
Simulated
A client is experiencing tachycardia and tremors. Lab values show elevated Free T4 and low thyroid stimulating hormone (TSH). Which diagnostic study will help the practitioner differentiate Graves' disease from other forms of hyperthyroidism?
Correct answer
B
Rationale
RAIU test (B) differentiates Graves' disease (high uptake) from other hyperthyroidism causes. Levothyroxine test (A) is irrelevant. ACTH test (C) assesses adrenal function. Thyroidectomy (D) is a treatment, not a diagnostic test.