• Dinna N Cruz, Zaccaria Ricci, and Claudio Ronco.
• Department of Nephrology, Ospedale San Bortolo, Viale Rodolfi 37, 36100 Vicenza, Italy. dinnacruzmd@yahoo.com
• Crit Care. 2009 Jan 1; 13 (3): 211211.

AbstractIn recent years, the use of the consensus definitions of acute kidney injury (RIFLE and AKIN) in the literature has increased substantially. This indicates a highly encouraging acceptance by the medical community of a unifying definition for acute kidney injury. This is a very important and positive step in the right direction. There remains some variation in how the criteria are interpreted and used in the literature, including use/nonuse of urine output criteria, use of change in estimated glomerular filtration rate rather than change in creatinine, and choice of baseline creatinine. The present review is intended to aid the reader in critically appraising studies using these consensus definitions. Since no single definition will be perfect, a logical next step would be to reconcile existing definitions, moving the medical community towards using a single consensus definition as has been done with sepsis and acute lung injury/acute respiratory distress syndrome. As new data emerge, integration of novel biomarkers into the consensus definition will be a welcome refinement.

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