What are the causes of venous thrombosis caused by surgery (after surgery

There are many reasons for venous thrombosis, among which venous blood stasis and hypercoagulability are two main factors. For example, postpartum placental abruption can quickly stop bleeding in a short time, which is closely related to the hypercoagulability of blood. Similarly, the cracks in the endothelial cell layer and the exposure of submucosal glue in the basement membrane can make platelets move to the intima of blood vessels, leading to the agglutination process.