• Leila C Volpon, Edward K Sugo, Julio C Consulin, Tabata L G Tavares, Davi C Aragon, and Ana P C P Carlotti.
• All authors: Division of Pediatric Critical Care, Department of Pediatrics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.
• Pediatr Crit Care Me. 2016 May 1; 17 (5): e229-38.

ObjectiveWe aimed to investigate the epidemiology, risk factors, and short- and medium-term outcome of acute kidney injury classified according to pediatric Risk, Injury, Failure, Loss, End-Stage Renal Disease, and Kidney Disease: Improving Global Outcomes criteria in critically ill children.DesignProspective observational cohort study.SettingTwo eight-bed PICUs of a tertiary-care university hospital.PatientsA heterogeneous population of critically ill children.InterventionsNone.Measurements And Main ResultsDemographic, clinical, laboratory, and outcome data were collected on all patients admitted to the PICUs from August 2011 to January 2012, with at least 24 hours of PICU stay. Of the 214 consecutive admissions, 160 were analyzed. The prevalence of acute kidney injury according to pediatric Risk, Injury, Failure, Loss, End-Stage Renal Disease and Kidney Disease: Improving Global Outcomes criteria was 49.4% vs. 46.2%, respectively. A larger proportion of acute kidney injury episodes was categorized as Kidney Disease: Improving Global Outcomes stage 3 (50%) compared with pediatric Risk, Injury, Failure, Loss, End-Stage Renal Disease F (39.2%). Inotropic score greater than 10 was a risk factor for acute kidney injury severity. About 35% of patients with acute kidney injury who survived were discharged from the PICU with an estimated creatinine clearance less than 75 mL/min/1.73 m and one persisted with altered renal function 6 months after PICU discharge. Age 12 months old or younger was a risk factor for estimated creatinine clearance less than 75 mL/min/1.73 m at PICU discharge. Acute kidney injury and its severity were associated with increased PICU length of stay and longer duration of mechanical ventilation. Eleven patients died; nine had acute kidney injury (p < 0.05). The only risk factor associated with death after multivariate adjustment was Pediatric Risk of Mortality score greater than or equal to 10.ConclusionsAcute kidney injury defined by both pediatric Risk, Injury, Failure, Loss, End-Stage Renal Disease and Kidney Disease: Improving Global Outcomes criteria was associated with increased morbidity and mortality, and may lead to long-term renal dysfunction.

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