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Thrombin Time
Test CodeTT
CPT Codes
85670
Preferred Specimen
Testing should be performed within 8 hours of draw. Draw blood in a blue-top (sodium citrate) tube. Spin specimen down twice and send 1 mL of plasma in plastic vial. If testing is delayed plasma should be placed in a tightly-sealing tube.
NOTE: If patient is on heparin therapy, plasma will only be stable for 2 hours at room temperature.
NOTE: If patient is on heparin therapy, plasma will only be stable for 2 hours at room temperature.
Transport Temperature
Frozen ≤1 month
Methodology
Clot-based assay
Setup Schedule
Monday through Sunday
Reference Range
13-21 seconds
Performed By
North Mississippi Medical Center Pathology Department
Performing Laboratory
NMMC Pathology Department
