Thrombin Time, Plasma  Email this article           Printer friendly page

Primary Name Thrombin Time
Synonym Thrombin clotting time
Contraction TT
Contraction TCT
UAB Procedure Number 2500171
CPT Code 85670
Specimen Collect one (1) blue-stopper tube (3.2% sodium citrate), filled to specified volume. Do not underfill or overfill.

Specimen Management Centrifuge blue-stopper tube within one (1) hour of collection, separate plasma and test or quick-freeze at -70°C.
Specimen Accepted All times.
Test Performed All times.
Available Stat? Yes.
Description The thrombin time is performed to detect the presence of heparin. If no heparin is present, the thrombin time may be used to detect fibrinogen abnormality. The thrombin time is always used to screen for heparin before performing PT or APTT mixing studies or the lupus anticoagulant profile.
Reference Interval < 21 seconds
Follow-up Test Confirm heparin if necessary by treating the specimen with Hepzyme or performing the chromogenic anti-Xa heparin assay.
Associated With Bleeding disorders
Associated With Heparin therapy
Associated With Direct thrombin inhibitor.
© Copyright by the University of Alabama at Birmingham
Top of Page