In children, there are limited data on extra renal replacement therapy. Pediatric studies are often retrospective, or often limited to specific disease processes or specific extra renal therapy. The lack of large studies including different usual modalities in pediatrics limits any formal recommendation on use in relation to patient outcomes, including renal recovery and mortality. Some of the issues that need consideration are the choice of dialysis modality (including Intermittent Hemodialysis, Continuous Renal Replacement Therapies, and Peritoneal Dialysis), the indications for and timing of dialysis intervention, the dose of dialysis and their effects on outcomes from acute kidney injury in children.