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Test Name:
Thyroid Panel

• SBMF No:
  44637
• Performance Lab Name:
  ARUP Laboratories
• Test Mnemonic:
  T7-
• ABN:
  May be required – Medical Necessity
• CPT Code:
  84436; 84479
• LOINC Code:
  3026-2; 3050-2; 32215-6
• Ref Lab Test No:
  0070141
• Test Includes:
  T3 Uptake
  Thyroxine
  Free Thyroxine Index (FTI)
• Also Known As:
  Free Thyroxine Index
  FT4 Index
  FTI
  T7
• Also See:
  30113 T4, Free
  30017 Thyroid Stimulating Hormone, Sensitive
• Spec Type:
  Serum
• Spec Container:
  Gold top (SST) or red top (serum) tube
• Alt Spec Type:
  Plasma
• Alt Spec Container:
  Green top (heparin) or Lavender top (EDTA) tube
• Pref Vol:
  1.0 mL
• Min Vol:
  0.5 mL
  Pediatric Collection: 0.3 mL
• Fasting:
  No
• Spec Collect:
  Routine venipuncture
• Spec Process:
  Serum sample tubes, allow blood to clot completely at room temperature
  Promptly centrifuge 15 minutes
  Immediately transfer serum or plasma to separate plastic tube
• Spec Store Transport:
  Refrigerated
• Spec Stability:
  After separation from cells:
  24 hours room temperature (20-30°C)
  1 week refrigerated (2-8°C)
  1 month frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles
• Spec Reject:
  Grossly hemolyzed sample
• Spec Remarks:
  Separate serum or plasma from cells ASAP
• Methodology:
  Electrochemiluminescent Immunoassay (ECLIA)
• Use:
  Obsolete test
  Thyroxine, Free (Free T4) (30113) is the preferred test alternative for T3 uptake and Free Thyroxine Index tests
• Clinical Significance:
  Refer to:
  
• Reference Range:
  

  Thyroid Panel (T7)
  FTI 1.7-4.2

  T3 Uptake
  28-41% uptake

  Thyroxine
  Cord blood: 6.60-17.50 µg/dL
  0-3 days: 5.37-22.40 µg/dL
  4-30 days: 5.24-23.20 µg/dL
  1-23 months: 5.37-16.00 µg/dL
  2-6 years: 5.26-14.80 µg/dL
  7-11 years: 5.70-14.10 µg/dL
  12-19 years: 4.74-14.60 µg/dL
  20 years and older: 5.10-14.10 µg/dL

  Note:
  FTI = Free Thyroxine Index

• Day Run:
  Sun-Sat (daily)
• Time Reported:
  1-2 days
• Test Type:
  HORMONE