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HelpTest Code LAB324 Thrombin Time
Department
HEMATOLOGY
Collection Requirements
Blue top tube, must be a full draw.
Mix thoroughly after collection (immediately).
Must be received in coagulation within 4 hours.
Primary Collection Container
Blue 2.7 mL (Citrate)
Transport
Platelet-poor plasma on ice
Preferred Transport Temperature
Frozen
Processing
Mix tube thoroughly before centrifugation.
If freezing, prepare using the following method:
Centrifuge specimen. Use a plastic pipette to transfer top three-quarters of plasma into labeled plastic tube. When removing the plasma layer, be careful not to disturb the cell layers. Plasma separated from cells goes back into the centrifuge for a second spin. After the second spin, use a pipette again to transfer plasma to a new set of labeled aliquot tubes, then freeze.
Stability
Ambient: 2 Hours
Refrigerated: 4 Hours
Frozen: 2 Weeks
Minimum Testing Volume
1mL
Reference Range
15-22 sec
Methodology
Turbidimetric clot detection.
ACL Advance
Performed
Sunday – Saturday
Reported
As completed
CPT Codes
85670
Unacceptable Conditions
Hemolyzed samples.
Clotted samples.
Short draw samples.
Serum specimens.