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| 40070:TRIIODOTHYRONINE (T3), FREE | |||||||||
| Alias Names: | T3, FREE T3 | ||||||||
| Methodology: | Chemiluminescent Immunoassay (CLIA) | ||||||||
| Edit Date: | 1/22/2008 | ||||||||
| Performed: | Daily | ||||||||
| Released: | Same day | ||||||||
| CPT Code: | 84481 | ||||||||
| 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: | Centrifuge SST or PST and transport refrigerated in original tube. Do not freeze. Centrifuge green top tube (heparin), separate plasma from cells and pour into a plastic vial. Refrigerate, or freeze if plasma cannot be assayed within 7 days. | ||||||||
| 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: | Specimen frozen in original tube; refrigerated specimen received in laboratory more than 7 days of collection; specimen frozen and thawed more than three times.
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| Reference Range: | |||||||||||||||||||
| Adult | 2.4-4.2 pg/mL | ||||||||||||||||||
| Pediatric | See report | ||||||||||||||||||