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Unit Code 200050:
T4 (Thyroxine), Free, Serum

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Method Description

This is a luminometric immunoassay. FT4 is measured using

an automated, competitive, chemiluminescent immunoassay on the

Advia Centaur instrument. FT4 in the specimen competes with an

acridinium ester-labeled analog of T4 for a limited amount of polyclonal

rabbit anti-T4 antibody, which is covalently coupled to paramagnetic

particles. An inverse relationship exists between the amount of FT4 in

the patient specimen and the amount of relative light units (RLUs)

detected by the system. (Package insert: Bayer Advia Centaur FT4

Bayer Diagnostics, East Walpole, MA. August 2004)

Performing Laboratory Location

Rochester

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