Related Experiment Video
Updated: Apr 29, 2026

The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
Published on: February 27, 2026
[Thrombin generation assays and their clinical application]
Anita Kern1, Katalin Várnai2, Barna Vásárhelyi2
1Semmelweis Egyetem, Általános Orvostudományi Kar Laboratóriumi Medicina Intézet Budapest Baross u. 48-52. 1047 Diagon Kft. Budapest.
The thrombin generation test assesses thrombin, a key coagulation enzyme. This global haemostasis assay aids in characterizing thrombosis and bleeding risks, and monitoring anticoagulant and hemophilia treatments.
Area of Science:
- Biochemistry
- Hematology
Context:
- Thrombin is a central enzyme in hemostasis, regulating both pro-coagulant and anti-coagulant processes.
- Assessing thrombin generation is crucial for understanding coagulation dynamics.
Purpose:
- To highlight the utility of the thrombin generation test (TGT) as a global hemostasis assay.
- To demonstrate TGT's applicability in assessing thrombosis risk, monitoring anticoagulant therapies, and evaluating bleeding severity in hemophilia.
Summary:
- The thrombin generation test measures the activity of thrombin, a critical enzyme in blood coagulation.
- It is sensitive to both pro- and anticoagulant factors, making it valuable for risk assessment of thrombosis and bleeding.
- Clinical studies show elevated thrombin generation in patients at high risk for venous or arterial thrombosis.
- TGT can monitor anticoagulant therapies, including novel oral anticoagulants.
- In hemophilia, TGT reflects bleeding severity and is useful for monitoring treatment, including inhibitor-bypassing therapy.
Impact:
- Provides a comprehensive assessment of hemostasis, aiding in the diagnosis and management of bleeding and thrombotic disorders.
- Offers a tool for personalized medicine by monitoring treatment efficacy and guiding therapeutic adjustments.
- Highlights the need for standardization of TGT methods and establishment of cutoff values for widespread clinical adoption.
Related Concept Videos
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Venous Thrombosis III: Interprofessional Care
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Clot Retraction and Fibrinolysis
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...

