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HelpTest Code Free T4 Free T4
Abbrev
FT4
Storage Temperature
R (2-8ºC)
ASTM/HL7/SDF 1
SQ=FT4P
EPIC=LAB127
Instrument/Location
Beckman DxI 9000
Specimen Requirements
Specimen
Type: Serum or Plasma (Lithium Heparin)
Container/Tube
Type: Gold Top or Lt. Green Top.
Collection
Instructions: Draw tube and label appropriately.
Allow Gold top tubes to clot for 30 minutes. Spin tubes within 2 hours.
Note: Hemolyzed Specimens are
not acceptable.
Specimen Transport Temperature
Spun tube/Refrigerated
Reference Values
0.60-1.10 ng/dl
Methodology
2-step competitive
Specimen stability/Retention time
Specimens are kept in Chemistry for 7 days. This test has a
specimen stability of 48 hours at 2-8 degress C.