40100:TRIIODOTHYRONINE (T3), UPTAKE

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40100:TRIIODOTHYRONINE (T3), UPTAKE
Alias Names: T3 UPTAKE
Methodology: Chemiluminescent Immunoassay (CLIA)
Edit Date: 1/21/2008
Performed: Daily
Released: Same day
CPT Code: 84479
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST). Also acceptable: One 4 mL green top tube (heparin) or one 4.5 mL light green plasma separator tube (PST).
Handling: Allow to clot, centrifuge SST or PST and transport refrigerated in original tube. Do not freeze. Centrifuge green top tube or lavender top tube, separate plasma and pour into a plastic vial. Refrigerate. Freeze if specimen cannot be assayed within 7 daus. Allow no more than one freeze/thaw cycle.
Stability: 8 hours ambient, 7 days refrigerated, or 1 month frozen.
Standard Volume: 0.5 mL serum or plasma.
Minimum Volume: 250 µL serum or plasma.
Transport: Refrigerated, or frozen on dry ice.
Rejection Criteria: EDTA; refrigerated specimen received in laboratory more than 7 days after collection; specimen frozen in original tube.
MEDICARE MAY REQUIRE A SIGNED ADVANCE BENEFICIARY NOTICE (ABN) FOR THIS TEST

Reference Ranges:
32.0-48.4% (0.320-0.484)