What is the most common cause of DIC?

What is the most common cause of DIC?

• A. Severe trauma
• B. Sepsis
• C. Malignancy
• D. Liver failure

Answer: (B)

Disseminated intravascular coagulation is driven by a systemic activation of coagulation pathways that leads to widespread microthrombi and consumption of platelets and clotting factors, resulting in both thrombosis and bleeding. The trigger that most commonly sets off this process in adults is sepsis. In septic states, inflammatory mediators and endotoxins stimulate monocytes and endothelial cells to express tissue factor, launching the coagulation cascade throughout the vasculature. This rapid, diffuse activation uses up clotting factors and platelets, causing prolonged coagulation times, low platelet counts, and elevated fibrin degradation products like D-dimer, with a tendency toward bleeding once consumption coagulopathy develops. Other factors like severe trauma, malignancy, or liver failure can precipitate DIC, but they are less frequent triggers overall. Trauma can cause activation of coagulation, malignancy can lead to chronic or paraneoplastic DIC, and liver failure can disrupt coagulation factor production, yet sepsis remains the leading cause driving the acute DIC picture typically seen in critical care.

Disseminated intravascular coagulation is driven by a systemic activation of coagulation pathways that leads to widespread microthrombi and consumption of platelets and clotting factors, resulting in both thrombosis and bleeding. The trigger that most commonly sets off this process in adults is sepsis. In septic states, inflammatory mediators and endotoxins stimulate monocytes and endothelial cells to express tissue factor, launching the coagulation cascade throughout the vasculature. This rapid, diffuse activation uses up clotting factors and platelets, causing prolonged coagulation times, low platelet counts, and elevated fibrin degradation products like D-dimer, with a tendency toward bleeding once consumption coagulopathy develops.

Other factors like severe trauma, malignancy, or liver failure can precipitate DIC, but they are less frequent triggers overall. Trauma can cause activation of coagulation, malignancy can lead to chronic or paraneoplastic DIC, and liver failure can disrupt coagulation factor production, yet sepsis remains the leading cause driving the acute DIC picture typically seen in critical care.