Acute kidney injury according to RIFLE criteria in an ICU: incidence and mortality impact
© Santana et al; licensee BioMed Central Ltd. 2013
Published: 19 June 2013
Acute kidney injury (AKI) is a very common condition in hospitalized patients, especially in ICUs. It is also closely related to adverse patient outcomes, mortality rates as high as three-quarters and as many as 13% need of renal support after hospital discharge. A systematic review demonstrated a close correlation between AKI according to the RIFLE criteria and mortality. The objective of this study was to evaluate the incidence of AKI according to the RIFLE criteria and the impact of each category on mortality in an ICU.
A retrospective cohort study was conducted with patients admitted to the adult ICU of Hospital Santa Luzia, Brasilia, DF, Brazil, in the period of 6 months. Patients were categorized as Risk (R), Injury (I), Failure (F), or without AKI according to RIFLE criteria. Patients with a previous diagnosis of chronic kidney disease were excluded.
AKI according to RIFLE criteria was associated with an increased mortality for all categories, mainly in patients with criteria to injury and acute kidney failure, and notably those who needed renal replacement therapy.
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