T4, free

Alphabetical Test listing

T4, free-251

  
T4, free
  
251
  
84439.0
  
FT4
  
Free thyroxine
  
Lithium heparin (Li hep) plasma
  
  
1.0 mL
  
0.2 mL
  

Spin

  

Lt green plasma separator (PST)

 

  
Serum
  
  

Gold serum separator (SST) tube

  

Refrigerated (preferred) - 6 days*

Frozen - 30 days

*Allina Health Laboratory stability studies have shown this analyte to be stable up to 5 days when stored refrigerated in gel tubes.

  
AHL - Chemistry: C
  
Daily
  
1 day
  

Chemiluminescent Microparticle Immunoassay (CMIA) and Chemiflex

  

0.70 - 1.80 ng/dL

  
84439
  
Yes
  
  
11/30/2001
  
09/11/2018
  
02/17/2020