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FREE T4 BY EQUIL DIALYSIS-TMS

Test Number:
  • 6143
Test Alias:
  • T4
Preferred Specimen:
  • Serum or Plasma
Container Type:
  • PLAIN RED TOP
Alternative Specimen:
  • LAV(EDTA)
Volume:
  • 2 mL
Collection Instructions:
  • Serum or plasma must be separated from cells within 45 minutes of venipuncture. Send serum or plasma in plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Transport Temperature:
  • Freeze
Specimen Stability:
  • Ambient: 2 days; Refrigerated: 5 days; Frozen: 1 year
Methodology:
  • Direct dialysis mass spectrometry; high-pressure liquid chromatography/mass spectrometry (HPLC/MS)
CPT Code:
  • 84439
Reject Criteria:
  • Gross hemolysis
Reference Range:
Report Available:
  • 6 days

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