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[Hemostatic abnormalities in DIC]
1Department of Laboratory Medicine, Mie University School of Medicine, Tsu 514-8507.
Insights
Diagnosing disseminated intravascular coagulation (DIC) is challenging. Hemostatic molecular markers offer improved sensitivity and specificity over traditional coagulation tests for early and accurate DIC diagnosis.
Area of Science:
- Hematology
- Pathophysiology
Context:
- Disseminated intravascular coagulation (DIC) diagnosis relies on global coagulation tests and molecular markers.
- Traditional tests like prothrombin time ratio and fibrinogen have high specificity but low sensitivity for DIC.
- Platelet count and FDP show good sensitivity but low specificity.
Purpose:
- To evaluate the utility of hemostatic molecular markers in diagnosing DIC.
- To compare the diagnostic accuracy of molecular markers against conventional coagulation tests.
Summary:
- Hemostatic molecular markers, including thrombin-antithrombin complex, soluble fibrin, thrombomodulin, and plasminogen activator inhibitor-I, reflect specific aspects of DIC pathophysiology.
- These markers are considered more reliable for DIC diagnosis than global coagulation tests.
- DIC presentation varies, with hyperfibrinolysis in leukemia-associated DIC and hypofibrinolysis in septicemia-associated DIC.
Impact:
- Early diagnosis and treatment of DIC are crucial for improving patient prognosis.
- Hemostatic molecular markers are vital tools for the timely and accurate diagnosis of DIC.
- Understanding DIC subtypes (e.g., leukemia vs. septicemia) aids in targeted management.
Abstract:
There are global coagulation tests and hemostatic molecular markers in the diagnosis of disseminated intravascular coagulation (DIC). In the global coagulation tests, the sensitivity of prothrombin time ratio and fibrinogen for the diagnosis of DIC is low, but their specificity is high. In platelet count and FDP, the sensitivity for the diagnosis of DIC is good, but the specificity is low. Fibrinogen may be unsuitable for the diagnosis of DIC, because it increases of the inflammatory reaction. It is possible to theoretically diagnose DIC by increased tissue factor production. It is currently considered that hemostatic molecular marker should be utilized to diagnose DIC. Thrombin-antithrombin complex and soluble fibrin are reflected to hypercoagulable state, thrombomodulin to vascular endothelial cell injuries, and plasminogen activator inhibitor-I to hypofibrinolytic state. In leukemia with DIC, hyperfibrinolysis and marked bleeding symptoms are often observed. In septicemia with DIC, hypofibrinolysis and severe organ failure often occur. Early diagnosis and treatment of DIC are important to improve the prognosis, and hemostatic molecular markers should be useful for that purpose.