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Thyroid Stimulating Hormone with Reflex to Free T4
Test Code2217
Alias/See Also
Third-Generation TSH; Thyroid Stimulating Hormone Ultrasensitive; TSH 3rd Generation
Preferred Specimen
One 4 mL serum separator tube or plasma separator tube.
Minimum Volume
1 mL serum or plasma at 2-8°C. (Min: 0.5 mL) Submit specimen in original tube.
Transport Temperature
1 mL serum or plasma at 2-8°C. (Min: 0.5 mL) Submit specimen in original tube.
Specimen Stability
After separation of cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Grossly hemolyzed specimens.
Methodology
Immunoassay
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
Allow serum to clot completely at room temperature. Separate serum or plasma from cells ASAP.
