[Coagulation and cirrhosis: new insight].

The liver plays a key role in coagulation as all clotting factors except for factor VIII are synthetized by hepatocytes. In cirrhotic patients, there is a decrease of clotting factors and a thrombocytopenia. Those parameters usually modify routine coagulation tests and may suggest that cirrhotic patients are at a higher risk of bleeding. However, studies have shown that these patients are rather at risk for thrombosis. The reason is a concomitant decrease of coagulation inhibitors factors that is not detected in routine laboratory coagulation tests. The coagulation system in cirrhotic patient is a balance of pro and anti-coagulants. This balance may be affected by co-factors such as renal failure or infection. Artificial correction of laboratory values by transfusion of blood products may be rather deleterious (e.g. volume overload, TRALI).