29 male patients (70%), mean age 76.34 ± 7.87 years; mean of serum creatinin 255.12 ± 102.84 μmol / L), 18 (43.91%) with fluid overload over 10%, mean of CVP 12.6 cmH2O; (10.7 cmH2O and 15 cmH2O, respectively; p = 0.003); APACHE II 20 and 22, p = 0.015; SOFA 8.65 and 10.44; p = 0.04; number of failure organs 1.57 and 2.39; p= 0.003; recover kidney function 31 (75.64%) within non-fluid overload group 18 (78.3%) and the opposite 13 (72.2%); p = 0.046; mortality rate 12 (51.2%) and 15 (83.3%); respectively.