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T3, Triiodothyronine, Total
Test CodeT3
Preferred Specimen
Serum, 0.2 mL minimum
Transport Container
SST tube
Transport Temperature
Specimen stable for 8 hours at room temp., 2 days refrigerated and >2 days frozen.
Reference Range
See report for normal ranges.
Clinical Significance
T3 level is an indicator of the ability of the thyroid to respond to both stimulatory and suppressive tests. It also offers a good estimation of thyroidal reserve.