Test Directory
T3 (Triiodothyronine), Reverse, Serum
Print this pageUpdated Test Information:
Test Description |
T3 (Triiodothyronine), Reverse, Serum
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Synonym(s) |
T3 (Triiodothyronine), Reverse
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Test ID |
RT3
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General Information |
Useful for:
An aid in the diagnosis of the "sick euthyroid" syndrome |
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Specimen Type |
Serum
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Specimen Requirements |
Red Top
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Stability |
Refrigerated (preferred) 28 days
Ambient 28 days Frozen 28 days |
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Unacceptable Specimen Conditions |
Gross hemolysis Reject
Gross lipemia OK Gross icterus OK |
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Methodology |
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
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Estimated TAT |
2-6 days
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Testing Schedule |
Monday, Wednesday, Thursday, Friday
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CPT Code(s) |
84482
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Minimum Sample Volume |
0.4 mL
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Reference Range |
10-24 ng/dL
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Performing Lab |
Mayo
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LOINC Code(s) |
3052-8
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