Ordering Recommendation

Not recommended as an initial test to detect antithrombin (AT) deficiency. Use to determine subtype in AT-deficient individuals.

Mnemonic
AT3AG
Methodology

Microlatex Particle-Mediated Immunoassay

Performed

Sun-Sat

Reported

1-2 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.

Specimen Preparation

Transfer 1 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Serum. EDTA plasma, clotted or hemolyzed specimens.

Remarks
Stability

Ambient: 8 hours; Refrigerated: Unacceptable; Frozen: 1 month

Reference Interval

82-136%

Interpretive Data



Compliance Category

FDA

Note
Hotline History
N/A
CPT Codes

85301

Components
Component Test Code* Component Chart Name LOINC
0030015 Antithrombin Antigen 27812-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Antithrombin Antigen (Immunologic), Plasma
  • Antithrombin III Antigen
  • Antithrombin III, Immunologic, Plasma
  • AT III Antigen
  • AT III Antigen/Immunologic
  • AT3 Antigen/Immunologic
Antithrombin, Antigen