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T3 Uptake

Mnemonic:    [T3 UPTAKE]
Name:    T3 Uptake
Specimen:    1 mL serum from a Red SST or Red top tube, or plasma from a Green PST.
Grossly hemolyzed samples are unacceptable.
Minimum Spec:    0.5 mL
Transport Temp:    Refrigerated
Spec Stability:    Stable 7 days refrigerated.
Ref Lab/Code:    ARUP 0070135
  Method:    Electrochemiluminescent Immunoassay
Free Thyroxine is the preferred test alternative for T3 Uptake and Free Thyroxine Index tests.