T3 Total


Abbrev Code:T3   
Order Code:LAB136Order Name:T3 Total
Synonyms:Total Thyroid; Triiodothyronine; TFT
Methodology:Roche: Electrochemiluminescence immunoassay (ECLIA)
Vista: Chemiluminescence
CPT Codes: 84480 x1, 84480 x1
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Roche Go Live Schedule



Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel)
Alternate Containers: Green (lithium heparin, no gel), Green (lithium heparin, gel) on ICE, Red (no gel), Red or gold (gel)
Causes for Rejection:Moderate hemolysis


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:Roche: 8 days at room temperature; 14 days refrigerated; 12 months frozen. Freeze only once.
Vista: 8 hours at room temperature; 24 hours refrigerated; indefinitely frozen.
Test Performed at or Referral Lab Chemistry  (Roche-UMMC East)


Interpretive

Reference Range:Roche:
Age ng/dL
0-5 d 73-288
6 d-2 mo 80-275
3-12 mo 86-265
1-5 y 92-248
6-10 y 93-231
11-19 y 91-218
20 y & older 85-202
 
Use:Only for confirmation of suspected hyperthyroidism.


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