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T4 (Thyroxine)
Test CodeT4
Alias/See Also
Performed at SQL, test code 8045
CPT Codes
84436
Preferred Specimen
mL serum from a serum separator tube (SST) (0.5 mL min). Centrifuge as soon as possible after clot formation. Be sure barrier forms a complete separation between serum and cells. prefer within 45 minutes after collection.
Instructions
See link below for specimen details, methodology, setup schedule and reference ranges.
Transport Container
Serum Separator Tube
Transport Temperature
Refrigerated
Specimen Stability
Ambient: Information not available
Refrigerated: 7 Days
Frozen: 4 Weeks
Refrigerated: 7 Days
Frozen: 4 Weeks
Methodology
Electrochemilumiescent Immunoassay (ECLIA)
Setup Schedule
Setup Days, Evenings & Nights: Monday through Sunday Results available in 1 day.
Additional Information
Thyroxine (T4)
