Advanced Diagnostic Laboratories

Collect

Plain red top or SST tube.

Specimen Preparation

Onsite [NJH]: Transport to lab within 1 hour.
Offsite: Separate serum from cells within 2 hours by centrifuge and aliquot into a labeled polypropylene or similar plastic tube.
Preferred volume: 1 mL serum

Pediatric Collection

Minimum volume: 0.3mL serum

Unacceptable Conditions

Grossly hemolyzed specimens, more than one freeze/thaw cycle.

Storage Transport Temp

Offsite: Frozen. Send serum Priority Overnight via FedEx and in a well insulated container on dry ice.

Stability

8 hours room temperature
48 hours refrigerated at 2-8°C
>48 hour frozen at -20°C

Performed

Mon-Fri

Methodology

1 Step Competitive Chemiluminescent

Reported

Results same day if samples are received prior to 6PM

Department

Core Lab

Synonyms

Triiodothyronine Uptake (T3 Uptake);TUPTX

Reference Interval

32.0 - 48.4% Uptake

CPT Code

84479