T4, total-847

Test info

  
T4, total
  
847
  
84436.0
  
T4
  
T4
Thyroxine
Total thyroxine

Specimen

  
Lithium heparin (Li hep) plasma
  
  
1.0 mL
  
0.4 mL
  

Immediatley following collection, mix sample thoroughly by gently inverting 8 - 10, times to prevent clotting

  

Spin within two (2) hours of sample collection

  

Lt green plasma separator (PST)

  
Serum
  
  

Immediatley following collection, mix sample by gently inverting 5 times

  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within two (2) hours of sample collection
  

Gold serum separator (SST) tube

  

Refrigerated (preferred) - 8 days

Ambient - 4 days

Frozen - 1 year

 

  
  • Improper labels (unlabeled or mislabeled)
  • Hemolysis 
  • Improper anticoagulant or ratio
  • Delay in transport
  • Improper storage temperature affecting results
  • Improper container
  • Leaking container resulting in compromised specimen
  • Quantity not sufficient (QNS)

Performance

  
AHL - Chemistry: C
  
Daily
  
1 day
  

Electrochemiluminescence immunoassay (ECLIA)

Clinical and Interpretive info

  

4.5 - 11.7 µg/dL

Billing

  
84436
  
Yes
  

Tracking

  
11/30/2001
  
01/01/2023
  
01/09/2024