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THYROXINE, FREE BY EQUILIBRIUM DIALYSIS

Mnemonic

FT4 ED

Specimen Collection Requirements

Collect

Serum, one 5.0 mL gold (SST) or 7.0 mL red top tube

Preferred Volume

2.0 mL

Minimum Volume

0.3 mL

Transport

Refrigerated

Rejection Criteria

Plasma

Stability

AFTER SEPARATION FROM CELLS: Ambient: 4 days; Refrigerated: 2 weeks; Frozen: 1 month

Testing Information

Performed

Sun, Tue, Thu

Reported

2-5 days

Method

Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry

Referral Lab

ARUP (93244)

Reference Values

Reference Values

Interpretation provided.
Age related ranges.

CPT Codes

84439

Last Updated: Thursday, March 14, 2019 12:51:12 PM


Client Services: 503-413-1234