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Free T4
| Item | Value | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Update Information | Effective March 19, 2013, the Free T4 assay changed from the Abbott Axsym to the Abbott Architect i2000 analyzer. NOTE new reference range. | |||||||||||||||||||||
| Approval req'd? | No | |||||||||||||||||||||
| Available Stat? | No | |||||||||||||||||||||
| Test code | FT4 | |||||||||||||||||||||
| Test group | Thyroid tests | |||||||||||||||||||||
| Performed by | China Basin Chemistry | |||||||||||||||||||||
| In House Availability | Monday - Saturday (day shift) | |||||||||||||||||||||
| Method | Two step chemiluminescent Microparticle Immunoassay (Abbott Architect i2000) | |||||||||||||||||||||
| Container type | Gold top or Light Green top | |||||||||||||||||||||
| Amount to Collect | 1 mL blood | |||||||||||||||||||||
| Sample type | Serum or plasma | |||||||||||||||||||||
| Preferred volume | 0.5 mL serum or plasma | |||||||||||||||||||||
| Min. Volume | 0.25 mL serum or plasma | |||||||||||||||||||||
| Processing notes | Refrigerate | |||||||||||||||||||||
| Units | pmol/L | |||||||||||||||||||||
| Normal range |
Pediatric reference ranges adopted from Pediatric Reference Intervals seventh edition (Soldin, Steven J. et al) and Canadian Laboratory Initiative on Reference Interval Database (CALIPER) Clin Biochem 2009;42:885-991 Adult 95% reference range from the manufacturer (personal communication, Abbott Labs) was verified by running 148 non-autologous donor samples from subjects on no medications and neg. for TgAb and TPO Ab |
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| Synonyms | tetraiodothyronine; free thyroxine | |||||||||||||||||||||
| Turn around times | 1 day | |||||||||||||||||||||
| Medical Necessity? | Yes. Click here for more information | |||||||||||||||||||||
| LOINC code | 3024-7 | |||||||||||||||||||||
| Last Updated | 3/19/2013 11:42:14 AM | |||||||||||||||||||||
| Entry Number | 916 |
If you have additional questions regarding this test, please call: 415-353-1667