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T3, Total

Source Blood
Mnemonic T3
If only T3 is indicated on the requisition, order Free T3 (FT3).
Specimen Requirements

1 x 3 mL or 4.5 mL light green (mint) top PST tube.  Gold top SST tube also acceptable.

0.5 mL plasma or serum

Minimum Whole Blood Volumes for Microcollections

Collection can be combined in one 5 mL PST or SST tube with other thyroid tests.

Specimen Handling
Additional Information
Testing Location Chemistry-DSC
Testing Frequency Daily
Alternate Name(s) Total T3 (TT3)
Reference Interval

Age

Male/Female

Units

1-365 days

1.5-4.2

nmol/L

1-15 years

1.4-3.3

nmol/L

16-150 years

1.1-2.8

nmol/L