Antithrombin antigen-994

Test info

  
Antithrombin antigen
  
994
  
LAB994
  
MSO
  
Antithrombin III activity
Antithrombin III, functional
AT
AT3 activity
Factor Xa inhibitor
Heparin Cofactor Activity
Serine Protease Inhibitor
  

Confirmation and characterization of congenital AT deficiency

Specimen

  
Sodium citrate (Na cit) plasma
  
  
2.0 mL
  
1.0 mL
  

Do not draw from an arm with a heparin lock or heparinized catheter

  
  1. Spin
  2. Transfer plasma to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)
  3. Freeze
  

Frozen

  
  • Severe hemolysis
  • Improper labeling
  • Clotted specimen
  • Specimen diluted with IV fluids
  • Samples thawed in transit
  • Improper sample type
  • Sample out of stability

Performance

  
LabCorp Burlington (015057): R-NX
  
Mo - Fr
  
2 - 3 days
  

Automated (LIATEST) enzyme immunoassay (EIA)

Clinical and Interpretive info

  

72 - 124%

  • In newborns, AT levels are lower than in adults (39% to 89%)
  • Levels gradually reach adult ranges by six months of age

Billing

  
85301
  
Result 27812-7

Tracking

  
06/25/2019
  
02/17/2021