Acute Renal Failure (ARF) is defined by a severe, and usually reversible, glomerular
filtration rate decreasing. Acute Tubular Necrosis (ATN) remain the major cause of ARF
involving distress and destruction of tubular cells. This specific typology of ARF may evolve
toward Chronic Renal Failure (CRF) concretizing a major public health issue.
Predict the progression of ARF towards CRF appears essential. The investigators believe that
the PIIINP and urinary NGAL biomarkers may constitute robust biomarkers of progression risk