Acute Renal Failure: sudden BUN/Creat. +- ability to regulate water & electrolyte balance.

• Prerenal Azotemia
• Acute Tubular Necrosis
• Acute Interstitial Nephritis
• Acute Glomerulonephritis or Vasculitis
• Acute Renovascular Disease
• Obstructive Uropathy
• Chronic Renal Failure

Indivifual patient clinical correlation required.