T Uptake

Abbrev Code:TUP   
Order Code:LAB8280Order Name:T Uptake
Synonyms:T3 Uptake
Methodology:Quantitative Electrochemiluminescent Immunoassay
CPT Codes: 84479 x1
Turnaround Time:Specimens sent to reference laboratory Mon-Sat; results are reported within 2 days.

Collection Instructions

Optimal Volume:3 mL
Minimum\Peds Volume:1.2 mL
Container:Red or gold (gel)
Alternate Containers: Green (lithium heparin, gel), Purple (EDTA)
Causes for Rejection:Gross hemolysis

Processing and Shipping

Specimen Processing:Allow specimen to clot completely at room temperature. ASAP, or within 2 hours of collection, centrifuge and aliquot 1 mL, 0.5 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:After separation from cells, 8 days at room temperature; 2 week refrigerated; 2 years frozen.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:3005977


Reference Range:0.8-1.3 TBI
Use:Thyroxine, Free (Free T4) is the preferred test alternative for T Uptake and Free Thyroxine Index tests. T Uptake is of little clinical value alone.

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