Test Name: Free Thyroxine (FT4) 
Alternate Test Names FT4 (Free Thyroxine); T4 (Free); Thyroxine (T4) 
PLS Test Code FT4  Laboratory Biochemistry 
Specimen Blood  Analysis Performed On Serum 
Container Serum Separator Tube (SST)  Container colour White 
Multiple specimens  
Required Volume Adult (mL) Req Vol Paediatric (mL)
Reference Ranges 12 - 23 pmol/L 
Turnaround Time Routine 8 Hours  Turnaround Time Urgent  
Turnaround Other  
Days test is performed Daily  Transport Room temperature 
Special Requirements None 
Patient Preparation None 
Collection Instructions Venepuncture. 
Clinical Information  
Sent to Reference Laboratory No 
Ref Laboratory Name  
Estimated Patient Fee N/A 
Last Updated 25-Aug-2006 (Version: 1.00)