A client is diagnosed with primary hypothyroidism. Which laboratory tests were used to aid in this diagnosis?
Standard Text: Select all that apply.
1. Serum T4 level
2. TSH level
3. Serum calcium
4. Serum potassium
5. Serum iodine level
Correct Answer: 1,2
Rationale 1: The serum T4 level is used to determine primary hypothyroidism.
Rationale 2: The TSH level is used to determine primary hypothyroidism.
Rationale 3: The serum calcium level is not used to determine primary hypothyroidism.
Rationale 4: The serum potassium level is not used to determine primary hypothyroidism.
Rationale 5: The serum iodine level is not used to determine primary hypothyroidism.
Global Rationale: Primary hypothyroidism is characterized by a low serum T4 level and an elevated TSH level. Serum levels of calcium, potassium, and iodine are not significant to the diagnosis.
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