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Lab Manual for Moffitt-Long and Mount Zion

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T3, Reverse

Item Value
Available Stat? No
Test code T3RV
Test group Thyroid tests
Performed by Quest
Sendout? Yes
Method LC/MS/MS
Container type Red top
Amount to Collect 1 mL blood
Sample type Serum
Preferred volume 0.25 mL serum
Min. Volume 0.15 mL serum
Processing notes Freeze serum, ship frozen to China Basin
Units ng/dL
Normal range
Male 9-28 ng/dL
Female 7-24 ng/dL
Synonyms Reverse T3; RT3
Stability Room temperature 1 week, refrigerated 3 weeks, frozen 3 weeks
Turn around times 3-5 days
Additional information Reverse T3 has limited application. The assay may be useful in the diagnosis of nonthyroidal illness (NTI). Patients with NTI have low T3 concentrations of rT3. RT3 may be useful in neonates to distinguish euthyroid sick syndrome from central hypothyroidism.

This test is performed using a kit that has not been cleared or approved by the FDA. The analytical performance characteristics of this test have been determined by Quest Diagnostics Nichols Institute. This test should not be used for diagnosis without confirmation by other medically established means.
CPT coding 84482-90
Medical Necessity? Yes. Click here for more information
LOINC code 3052-8
Last Updated 4/5/2013 1:05:02 PM
Entry Number 1037
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