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Antithrombin (AT) III Antigen *

SIM

15063 

CPT

85301 

Synonyms

Antithrombin III Antigen;  Antithrombin, Immunologic; at III Antigen 

Specimen Type

Plasma 

Container

 Blue top- Sodium Citrate tube

Collection Instructions

Collect in blue top tube containing 3.2 % buffered sodium citrate.  Fill to completion to ensure proper blood to anticoagulant ratio.  Mix sample by gentle inversion

Volume

Volume: 2 ml.
Min. volume: 1 ml.

Additional Information

Confirmation and characterization of congenital AT deficiency

Patient Preparation

Do not draw from an arm with a heparin lock or heparinized  catheter.  Patient should not be on heparin therapy because heparin decreases plasma AT levels.

Specimen Processing Instructions

Separate plasma from cells and freeze ASAP

Transport Requirements

Frozen

Specimen Stability

7 days 

Rejection Criteria

Hemolysis; improperly filled tubes; thawed specimen;
serum or specimen collected with anticoagulant other than sodium citrate

Reference Range

39% to 89% newborns levels are lower; levels reach adult ranges by 6 months.

Critical Value

 

Test Includes

Antithrombin III antigenic levels 

Methodology

Automated (liatest) enzyme immunoassay (EIA) 

Testing Frequency

 

LCA

015057 

Reviewed By

Lisa McBride 

Reviewed Date

2/5/2018

Supplemental

* Denotes Reference Lab Test  

Reviewed by Lisa McBride on February 05, 2018

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