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T3,REVERSE, LC/MS/MS

Test Number:
  • 1033
Test Alias:
  • T3R
  • Triiodothyronine Reverse
Preferred Specimen:
  • Serum
Container Type:
  • No additive Red Top Tube or SST
Alternative Specimen:
  • Plasma from a sodium heparin green top tube or EDTA lavender top tube
Volume:
  • 1 mL
Collection Instructions:
  • Allow blood to clot at room temperature for 30 minutes. Centrifuge and separate the serum from cells immediately. Alternatively, collect blood in a gel barrier tube, allow to clot at room temperature, centrifuge and remove from gel within 24 hours.
Transport Temperature:
  • Room temperature or refridgerated
Specimen Stability:
  • Room temperature: 7 days
  • Refrigerated: 7 days
  • Frozen: 30 days
Methodology:
  • Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
CPT Code:
  • 84482
Reject Criteria:
  • Unseparated serum (>48 hours on clot) • Serum in Serum Separator Tube (SST®) not separated from the gel within 24 hours
Reference Range:
  • 8-25 ng/dL
Report Available:
  • 5 days

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