Renal failure is defined as sudden decline in functioning of the renal system. It is contributed to failure in renal circulation which commonly due to glomerular or tubular damage. There are various factors which are attributed to this disease condition. It could be because of reduction in renal blood flow, hypotension, sepsis, hypovolemia/dehydration, trauma, obstructive lesions, and to some because of nephrotoxic agents.
Acute renal failure has several stages: onset, oliguric, or anuric, diuretic, and convalescent or recovery phase. Meanwhile, the irreversible progressive deterioration of renal function which is primarily due to uremia is called chronic renal failure. Treatment for renal failure depends on stage and severity of renal compromise.