 Acute kidney injury AKI is associated with high mortality and morbidity rates in critically ill patients despite advances in renal replacement therapy RRT. Over the last few years, new devices in dialysis equipment, such as blood temperature and blood volume on-line monitors, have been developed to improve hemodynamic tolerance, and these new modalities have demonstrated their positive impact on decrease in intra-dialytic hypotension rate in chronic hemodialysis patients. In order to evaluate these new devices in critically ill patients with acute kidney injury we decided to conduct a prospective randomized controlled trial. 