Sign in →

Test Code T3 T3 (Triiodothyronine), Total

Important Note

Patients taking high doses of Biotin may have false elevated Total T3 results

Performing Laboratory

Greenbrier Valley Laboratory 304-647-6060
Memorial Hospital Laboratory- Automated Procedures  304-388-5953       
Teays Valley Hospital Laboratory 304-757-1770

Specimen Requirements

Plasma- Mint Green, Dark Green Lithium Heparin or Serum-SST gold top, red top

Allow SST or red top to completely clot

Spin and physically separate plasma/serum from contact with cells as soon as possible

4 mL of plasma/serum (minimum 2 mL)

 

Additional sample type that can be used ONLY at Greenbrier

EDTA

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient

Additional rejections ONLY at Greenbrier

  • Turbid
  • Hemolyzed
  • Lipemic

Storage and Stability

Memorial,Teays 

Room temperature 15-30oC 8 hrs
Refrigerated 2-8oC 48 hrs
Frozen <-20oC Not specified

Greenbrier

Refrigerated 2-8oC                                      7 days
Frozen -20oC            4 weeks

Reference Values

0.87-1.78 ng/mL

Methodology

Memorial, Teays-Chemiluminescent  immunoenzymatic competitive assay

Greenbrier- Competitive immunoassy

Days Test Set Up and Turnaround

Monday through Friday, Continuously

AM Collection Expected by 9AM same day
Routine Expected within 24 hrs
Stat Expected within 1 hr
Timed Expected results are test dependant

CPT Coding

84480