<unk>   describes the three broad categories of factors that are thought to contribute to thrombosis.
Hypercoagulability
Hemodynamic changes (stasis, turbulence)
Endothelial injury/dysfunction
It is named after the eminent German physician Rudolf<unk>  (1821-1902). However, the elements comprising<unk>  were neither proposed by<unk> , nor did he ever suggest a<unk>  to describe the pathogenesis of venous thrombosis. In fact, it was decades following<unk> 's death before a consensus was reached proposing that thrombosis is the result of alterations in blood flow, vascular endothelial injury, or alterations in the constitution of the blood. Still, the modern understanding of the factors leading to embolism are similar to the description provided by<unk> . Its nebulous origins notwithstanding,<unk>  remains a useful concept for clinicians and pathologists alike in understanding the contributors to thrombosis.
Virchow's triad
Samter's triad
Glagov phenomenon
Aaron's sign
Ballance's sign
Kernig's sign
Faget's sign
Westphal's sign