I Causes and classification Acute renal failure(ARF) may result from a wide variety of diseases(shock, heart failure, severe infection, hepatic diseases) trauma, surgical procedures, drugs, renal toxins and urinary tract obstruction According to causes arf may be divided into three main categories: Prerenal Intrarenal (acute renal failure Postrenal 1717 l. Causes and classification Acute renal failure (ARF) may result from a wide variety of diseases (shock, heart failure, severe infection, hepatic diseases), trauma, surgical procedures, drugs, renal toxins and urinary tract obstruction. According to causes, ARF may be divided into three main categories: Prerenal Intrarenal acute renal failure Postrenal