A
5200 Harry Hines Blvd.
,
Dallas
,
TX
75235
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General Information
Alias: FT3, Free Triiodothyronine
Performed: 24 hrs.
Turn Around Time: Med Emerg: 90 minutes; Routine: 4 hrs.
CPT Codes: 84481
Performed By: Chemistry
Clinical Utility: Triiodothyronine is one of the thyroid hormones present in serum which regulate metabolism. Determination of this hormone concentration is important for the diagnostic differentiation of euthyroid, hyperthyroid and hypothyroid states. Reflex Protocol: If Free T4 is 0.8-1.8 ng/dL, and the TSH is <0.4 mcIU/mL, Free T3 will be performed.
Components
Name |
Method |
Sex |
Age Range |
Ref. Range Low |
Ref. Range High |
Units |
T3, Free |
Electrochemiluminescence Immunoassay |
All |
All |
2.0 |
4.4 |
pg/mL |
Specimen Requirements
Type |
Container |
Volume |
Units |
Collection / Delivery |
Storage / Transport |
Off Campus |
Blood |
Red with Gel, 5mL |
Fill tube |
|
Deliver to the Logistics laboratory within 2 hours of collection. |
Room Temperature |
Specimens should be spun and aliquots prepared when needed. Store in appropriate temperature conditions and deliver to Logistics Laboratory. |