 Hemorrhagic complications Mild hemorrhage: decrease of Hb levels 3 gdl without hemodynamic impact, without need for surgical revision or endovascular intervention; conservative treatment transfusion of 2-3 red blood cells units and fluid infusion; Severe hemorrhage: decrease of Hb levels 3 gdl with hemodynamic impact tachycardia, hypotension, oliguria etc; transfusion of more than 3 red blood cells units; need for surgical revision or endovascular treatment. 