Classifica？？o de RIFLE: análise prospectiva da associa？？o com mortalidade em pacientes críticos

introduction: the recent rifle classification defines three degrees for severity of acute kidney injury (aki): risk, injury and failure and was associated with mortality according to the grading of the severity of aki, but little valued at prospective studies. objective: to evaluate the association of rifle score with mortality in critically ill patients and compare the clinical characteristics between them. method: an observational prospective cohort study of 200 patients admitted to the icu, from july/2010 to july/2011. patients included were older than 18 years, had for more than 24 hours in the icu and signed the term of informed consent. results: the frequence of aki in the icu was 47% (n = 95), the maximum rifle: risk 4.5% (n = 09), injury 11%(n = 23) and failure 31.5% (n = 63). the icu mortality was 25.5% (n = 51). the rifle categorized into class riflemaximum class injury + failure had a higher mortality compared to the subgroup categorized no lra + aki risk class (53.3% vs. 4.4%) and the greater the relative risk of the patient so classified: rr = 3.3 (95%: 2.5 to 4.4) p < 0.001. rifle categorized as riflemaximum class injury + failure and sofamaximum score, independently associated with icu mortality after adjustment for multiple variables. conclusion: the severity of aki according to rifle criteria was a risk marker for mortality in this population. the lra group class injury + failure was associated with increased mortality when compared to the subgroup without aki + aki that remained in risk class even after adjustments for multiple variables.