Thrombin clotting Time : 883

Test Code
TCT or 883


CPT Codes
85670

Transport Container
1 mL frozen platelet-poor plasma collected in 3.2% sodium citrate (light blue-top) tube (Min: 0.5 mL)
Submit a separate, frozen vial for each special coagulation assay ordered. Draw blood in a light blue-top tube containing 3.2% sodium citrate. Mix gently by inverting 3-4 times. Centrifuge 15 minutes at 1500g within one hour of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Freeze immediately and transport on dry ice.


Transport Temperature
Frozen


Specimen Stability
Room temperature: Unacceptable; Refrigerated: Unacceptable; Frozen: 30 days


Methodology
Clot detection

FDA Status
FDA

Setup Schedule
Monday - Saturday


Report Available
1-3 days


Reference Range
13-19 seconds


Clinical Significance
Thrombin clotting time is useful for evaluating the presence of heparin and other direct thrombin inhibitor anticoagulants in specimens with prolonged coagulation studies. It is also used to aid in the diagnosis of congenital and acquired disorders of fibrinogen.
  
Anticoagulant interference: Expected impact by therapeutic levels (potential interference depends upon drug concentration):
• Vitamin K antagonists (e.g., warfarin) - no effect
• Heparin (UFH or LMWH) – prolonged
• Dabigatran or Argatroban (direct thrombin inhibitors) – prolonged
• Rivaroxaban, Apixaban, Edoxaban (Factor Xa Inhibitors) - no effect


Performing Laboratory
med fusion



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.