TRH Stimulation for Thyroid Function

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Test Code: L590
Results:: 1-2 days.
Container: All samples should be in red top or serum separator tube.
Specimen: 0.5 mL PRE serum, 0.5 mL 2-hour POST serum, 4-hour POST serum (label accordingly).
Test Description: T3 (Baseline), T4 (Baseline), T3 (2-hour POST TRH), T4 (4-hour POST TRH)

Sample Handling:
• Draw baseline serum sample.
• Administer 1 mg of TRH IV.
• Draw 2-hour POST serum sample.
• Draw 4-hour POST serum sample.

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