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?
Levothyroxine replacement test
Radioactive iodine uptake (RAIU) test
Adrenocorticotropic hormone (ACTH) stimulation test
Subtotal thyroidectomy
The Correct Answer is B
A. Levothyroxine replacement test: This test is used to assess the thyroid's response to synthetic thyroid hormone and is not used to differentiate types of hyperthyroidism.
B. Radioactive iodine uptake (RAIU) test: This test measures the thyroid gland's ability to absorb iodine, which helps differentiate Graves' disease (characterized by increased uptake) from other forms of hyperthyroidism, such as thyroiditis (which may show decreased uptake).
C. Adrenocorticotropic hormone (ACTH) stimulation test: This test is used to evaluate adrenal function and is not relevant for diagnosing or differentiating forms of hyperthyroidism.
D. Subtotal thyroidectomy: This is a surgical procedure rather than a diagnostic test and would not be used to differentiate between types of hyperthyroidism.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. IV hydrocortisone: In an Addisonian crisis, there is an acute adrenal insufficiency which requires immediate treatment with IV hydrocortisone to replace the deficient glucocorticoids. This helps to rapidly correct the hormone imbalance and stabilize the patient.
B. Ketoconazole and insulin: Ketoconazole is an antifungal medication used to treat Cushing syndrome, not Addisonian crisis. Insulin is used for managing blood glucose levels and is not directly related to the treatment of an Addisonian crisis.
C. Lactated Ringer's IV infusion: While fluid replacement may be necessary in an Addisonian crisis, the immediate priority is to address the adrenal insufficiency with hydrocortisone. Lactated Ringer's may be used to support fluid balance but is not a substitute for glucocorticoid therapy.
D. Furosemide slow IV push: Furosemide is a diuretic used to manage fluid retention and is not indicated for treating Addisonian crisis. The primary treatment for Addisonian crisis is to address the adrenal hormone deficiency with hydrocortisone.
Correct Answer is B
Explanation
A. Levothyroxine replacement test: This test is used to assess the thyroid's response to synthetic thyroid hormone and is not used to differentiate types of hyperthyroidism.
B. Radioactive iodine uptake (RAIU) test: This test measures the thyroid gland's ability to absorb iodine, which helps differentiate Graves' disease (characterized by increased uptake) from other forms of hyperthyroidism, such as thyroiditis (which may show decreased uptake).
C. Adrenocorticotropic hormone (ACTH) stimulation test: This test is used to evaluate adrenal function and is not relevant for diagnosing or differentiating forms of hyperthyroidism.
D. Subtotal thyroidectomy: This is a surgical procedure rather than a diagnostic test and would not be used to differentiate between types of hyperthyroidism.
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