Results: the prevalence of those criteria is significantly decreased in study group compared with the control group: ventilation time 87 hours vs 216 hours (p=0.0015); ICU stay 8 days vs 15 days (p = 0.011); prevalence of acute renal insufficiency 5 cases vs 12 cases (p=0.05); prevalence of infection 6 cases vs 10 cases (p=0.027); mortality 2 cases vs 6 cases (p=0.15).