The first publication of consensus criteria for AKI was published in 2004 by the Acute Dialysis Quality Initiative Group (ADQI). The system was termed RIFLE (risk, injury, failure, loss of kidney function, end-stage renal failure). It categorizes AKI into three severity classes -Risk, Injury and Failure- and two outcome classes, Loss of kidney function and End-stage kidney disease. Later, in 2007, the Acute Kidney Injury Network (AKIN) published a modified definition of the RIFLE criteria, outlining AKI as abrupt (occurring within 48 hours) and using a smaller change in serum creatinine from baseline in patients to calculate the AKIN stages. Stage 1 of AKI was defined as an increase in S.Cr greater than or equal 0.3 mg/dl or greater than or
