2. In the protocol guided group patients all patients would be considered for dialysis within 6 hours of randomization After randomization patients would receive dialysis as three sessions per week of at least 4 h with a blood flow >200 mL/min and a dialysate flow >500 mL/min in intermittent group and as 20-25 mL/kg/h of effluent, by filtration and/or diffusion in continuous form until recovery of renal functions