Test Code 0213371 T4 (Thyroxine), Free, Serum or Plasma
Methodology
Chemiluminescent microparticle immunoassay (CMIA)
Performing Laboratory
Alomere Health Hospital Laboratory
Specimen Requirements
Specimen Type: Serum
Collection Container/Tube:
Preferred: Gold (gel separator) or Red (plain)
Acceptable: Plasma, Green top Lithium heparin
Specimen Volume: 2.0 mL
Specimen Minimum Volume: 0.2 mL
Collection Instructions:
1. Allow serum tubes to clot completely. This may take up to 30 minutes.
2. Remove sample from cells by pipetting.
3. Indicate whether serum or plasma.
Specimen Transport Temperature
Refrigerated
Reference Values
0.70-1.48 ng/dL
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
84439