Yale New Haven Hospital

Department of Laboratory Medicine
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T3, reverse

Lab Section: 

Sendout Reference

 

Lab Location: 

Sendout

Reference Lab: 

Quest

 

Test ID: 

LAB138

 

Methodology: 

Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Schedule: 

Tues-Sat a.m.

Reported: 

5 days

Specimen Requirements: 

Collection: 3.0 mL Blood in a Red Top Tube.
Pediatric volume: 1 mL.
Alternative specimens: Plasma collected in: Sodium heparin (green-top) tube • EDTA (lavender-top) tube
Transport: Room temperature.
Unacceptable conditions: Unseparated serum (>48 hours on clot) • Serum in Serum Separator Tube (SSTŪ) not separated from the gel within 24 hours
Stability: Room temperature: 7 days Refrigerated: 7 days Frozen: 30 days

 

Notes: 

Clinical Indications: The assay may be useful in the diagnosis of nonthyroidal illness (NTI). Patients with NTI have low T3 concentrations and increased concentrations of rT3. RT3 may be useful in neonates to distinguish euthyroid sick syndrome from central hypothyroidism.

Reference Interval: 

See patient report or consult reference laboratory website.

http://www.questdiagnostics.com/testcenter/TestDetail.action?tabName=OrderingInfo&ntc=90963

CPT Code(s): 

84482

Last Changed: 

8/14/2017 7:33:45

Last Reviewed: 

8/14/2017 7:33:45