摘要:ACUTE RENAL INJURY (AKI) IS A CLINICAL SYNDROME THAT HAS MULTIPLE ETIOLOGIES AND IS CHARACTERIZED BY A DECREASE IN KIDNEY FUNCTION. AKI IS A FAIRLY COMMON DIAGNOSIS IN HOSPITALIZED PATIENTS, WITH AN INCREASING INCIDENCE IN RECENT DECADES, BEING ASSOCIATED WITH LOW OUTCOMES AND HIGH HOSPITALIZATION COSTS. GIVEN THE STEADY PROGRESS OF THE LAST DECADE IN THIS REVIEW, WE BRIEFLY DISCUSS THE EVOLUTION OVER TIME OF THE AKI DEFINITION, CLASSIFICATION, NEW METHODS OF DIAGNOSIS AND TREATMENT.