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Test Compendium

3060: THYROXINE, TOTAL (T4)

Test Code

  • 3060

Test Synonym

  • T4, TOTAL T4

Volume

  • 1 mL

Minimum Volume

  • 0.2 mL

Specimen Requirements

  • Serum

Container

  • Serum Separator Tube, Transfer Tube- Serum, Plain Red Top Tube

Storage

  • Refrigerated

Turn Around Time

  • 1 day

Special Instructions

  • 1 SST

Specimen Stability

  • 4 days at 15-25 °C, 8 days at 2-8 °C 12 months at -20 °C Freeze only once.

Reference Range

  • Fasting Sex Message Lines Ref Ranges Unit of Measure
    4.5 - 11.7 ug/dL