[The hemostasis system state in patients with ulcerous gastrointestinal bleedings].

ABSTRACT

In patients with gastrointestinal bleedings there occurs activation of the hemostasis system directed to arrest of bleeding. Short-term hypercoagulation directed to arrest of the bleeding gives place to hypocoagulative changes. Their degree and duration depend on the severity and rate of blood loss. The excessive intravascular activation of blood is accompanied by the formation of fibrin deposits not only in the area of the bleeding source but in other regions of the blood channel. There appears disseminated intravascular coagulation of blood deteriorating the reparative processes in the ulcer, initiating and maintaining generalized plasminemia which promotes the thrombus lysis in the ulcer crater and recurrent bleeding.