ARUP's Laboratory Test Directory

Triiodothyronine, Total (Total T3) : 0070474

Mnemonic: T3 TOTAL

Methodology: Electrochemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 4 mL plasma separator tube or serum separator tube.  Also acceptable: one 3 mL lavender (EDTA), pink (K2 EDTA), or green (sodium or lithium heparin).

Storage/Transport Temperature:  1 mL serum or plasma at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.

Remarks:  Allow serum to clot completely at room temperature.  Separate serum or plasma from cells ASAP.

Unacceptable Conditions:  Grossly hemolyzed specimens.

Stability (collection to initiation of testing):  After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month
Reference Interval:
Cord blood: 14-86 ng/dL
1-7 days: 100-470 ng/dL
8-364 days: 105-245 ng/dL
1-9 years: 94-269 ng/dL
10-19 years: 102-200 ng/dL
20 years and older: 80-200 ng/dL
CPT Code(s): 84480
Cross References: Total T3
 
 

 

 

 
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