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Thrombin Time
Test CodeLAB324
Alias/See Also
TT
CPT Codes
85670
Preferred Specimen
2.7 ml (2.7 ml minimum) sodium citrate (blue) whole blood. Refer to Hemostasis/Thrombosis Specimens section for specimen collection instructions
Minimum Volume
2.0 ml (1.5 ml minimum) citrated platelet-poor plasma
Instructions
Full tube, no partial fills
Transport Temperature
Room temp
Specimen Stability
Unspun: 2 hours room temp; Separated from cells: 4 hours refrigerated, 2 weeks frozen
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Overfill or under fill of collection tubes, Clotted, hemolyzed specimens
Methodology
Mechanical Clot Detection
Setup Schedule
Mon- Sun
Reference Range
0.1-21.0 seconds
Clinical Significance
Prolongation of the Thrombin Time indicates an abnormal fibrin formation. This test is typically used for the
evaluation of Disseminated Intravascular Coagulation (DIC), monitoring heparin anticoagulant and fibrinolytic
therapy, detection of the presence of Fibrin/Fibrinogen Degradation Products (FDP), hereditary or acquired
qualitative and quantitative fibrinogen abnormalities and increased fibrinolysis
evaluation of Disseminated Intravascular Coagulation (DIC), monitoring heparin anticoagulant and fibrinolytic
therapy, detection of the presence of Fibrin/Fibrinogen Degradation Products (FDP), hereditary or acquired
qualitative and quantitative fibrinogen abnormalities and increased fibrinolysis
Performing Laboratory
Piedmont Athens Regional
