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THYROID PANEL
Test Code455
Alias/See Also
"99 Thyroid Profile (Compliance)
Thyroid Profile A (Euthyroid) Hormone-binding Ratio (T3 Uptake)
"
Thyroid Profile A (Euthyroid) Hormone-binding Ratio (T3 Uptake)
"
CPT Codes
"84436 84479"
Includes
"Free thyroxine index; T3 uptake (THBR); thyroxine (T4)
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Preferred Specimen
1 mL Serum
Minimum Volume
0.5 mL
Instructions
"If a red-top tube is used, transfer separated serum to a plastic transport tube.
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Transport Container
"Red-top tube or gel-barrier tube
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"
Transport Temperature
Refrigerated
Specimen Stability
"
Room temperature
14 days
Refrigerated
14 days
Frozen
14 days
Freeze/thaw cycles
Stable x3
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Room temperature
14 days
Refrigerated
14 days
Frozen
14 days
Freeze/thaw cycles
Stable x3
"
Methodology
"Cloned enzyme donor immunoassay (CEDIA) "
Clinical Significance
"FTI is a physiologic index of metabolic activity that correlates with free thyroxine (T4)
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