Intermittent hemodialysis (IHD) and continuous RRT (CRRT) provided as continuous hemofiltration or hemodiafiltration are the main RRT modalities in ICU. Randomized controlled trials (RCTs) comparing IHD and CRRT for AKI have not shown an indisputable benefit of one technique over the other. However, these studies were conducted more than 15 years ago. In addition, several recent RCTs on RRT initiation strategies have completely modified both knowledge and practice of RRT initiation. The main objective is to evaluate whether IHD is not inferior to CRRT with regard to overall incidence of a composite outcome of death, persistent renal dysfunction and dialysis dependency at day 90 in critically ill patients with severe AKI (Major Kidney Event 90, MAKE 90). The primary endpoint will be the proportion of patients who will meet one or more criteria for a major adverse kidney event 90 days after randomization (MAKE90). The MAKE will be the composite of death, renal replacement therapy dependence and/or an increase in serum creatinine above 25% of its basal value. This is a non-inferiority multicenter open-label randomized controlled trial with two parallel groups. Randomization will take place 1:1 to 2 groups: a group receiving IHD and a group receiving CRRT. Randomization will be stratified according to center, dose of vasopressor and cumulative fluid balance from ICU admission. Treatment will be initiated and monitored by the physician responsible for patient. Whatever the group, investigators will follow recommendations to achieve optimal metabolic control and hemodynamic stability. The investigators plan to include 1000 patients.
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Major Adverse Kidney Event 90 days after randomization (MAKE90).
Timeframe: 90 days after randomization