The nurse is reviewing the laboratory results for a group of patients. Which set of results should the nurse identify as being consistent with primary hypothyroidism?
1. elevated TSH, depressed T3 and T4
2. elevated TSH, elevated T3 and T4
3. depressed TSH, elevated T3 and T4
4. depressed TSH, depressed T3 and T4
Correct Answer: 1
Primary hypothyroidism emanates from the thyroid gland itself. Laboratory analysis will indicate an elevated TSH, as the pituitary attempts to stimulate the thyroid gland to produce thyroid hormone, and the thyroid hormone levels T3 and T4 will be low. Elevated T3 and T4 levels are not consistent with hypothyroidism. TSH is depressed in hyperthyroidism.
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