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ANTI-THROMBIN ACTIVITY
Number 724
CPT Code 85301
Alias ANTITHROMBIN III ACITIVITY, ANTITHROMBIN III FUNCTIONAL, FACTOR XA INHIBITOR, HEPARIN COFACTOR ACTIVITY, SERINE PROTEASE INHIBITOR
Specimen Container Blue Top Citrate
Specimen Type Plasma Citrate
Turn Around Time 
Days Performed 
Reference Range Contact Laboratory
Alternate Specimen 
Volume 2 mL Plasma
Stability Ambient Unstable
Stability Refrigerated Unstable
Stability Frozen Preferred
Patient Preparation 
Methodology 

The patient plasma is mixed with heparin and thrombin. The extent of thrombin inhibition is proportional to the AT concentration of the patient sample. Residual thrombin activity is measured as the rate of conversion of a chromogenic substrate and is used to calculate AT concentration.

Limitations 
Rejection Criteria 

Severe hemolysis; improper labeling; clotted specimen; specimen diluted with IV fluids; samples thawed in transit; improper sample type; sample out of stability

Additional Instructions 
Performing Laboratory Reference Laboratory
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COVID-19 Testing Guidance

Primex Clinical Laboratories strives to provide clients with quality testing services to better support patient health. With the ongoing pandemic, COVID-19 testing has become high in demand yet testing supplies are limited.

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COVID-19 Testing Guidance

Primex Clinical Laboratories strives to provide clients with quality testing services to better support patient health. With the ongoing pandemic, COVID-19 testing has become high in demand yet testing supplies are limited.

Read More