Which of the following is NOT a component of Virchow's triad?

• A. Venous stasis
• B. Endothelial injury
• C. Hypercoagulability
• D. Inflammation

Answer: (D)

Virchow's triad identifies three conditions that promote thrombosis: venous stasis, endothelial injury, and a hypercoagulable state. Inflammation, while it can contribute to thrombosis by promoting endothelial activation and increasing procoagulant factors, is not one of these three categories. The triad specifically highlights how slowed or disturbed blood flow, damage to the vessel lining, and an increased tendency of the blood to clot create the environment for clot formation. So the statement that inflammation is not a component is correct because the triad comprises stasis, endothelial injury, and hypercoagulability, with inflammation acting as an indirect driver rather than a separate element.