Acute Renal Failure

Acute renal failure can be divided into three categories: 

a. Acute renal failure characterized by diminished renal blood flow (60 to 70 percent of cases). 


b. Acute renal failure, due to damage to the renal tissue (25 to 40 percent of cases). 

c. Acute renal failure because of urinary tract obstruction (5 to 10 percent of cases). 

Causes not related to kidney per se

1. Systemic conditions like heart failure, blood or fluid loss.

2. Local causes renal artery narrowing, Diseases of arteries.

Renal causes

1. Acute tubular necrosis - 85% /toxic/septic renal failure

2. Glomerular disease - 5% (primary in systemic diseases) 

3. Other diseases of Kidney - 10%

Causes of blocked flow of urine from kidney 

Urinary tract obstruction like in tumors, stones, inflammation etc.