Anuria

Causes Appropriate Tests
 

Electrolytes, Creatinine, Urea. Sodium urine, Osmolality urine.

The urea/creatinine ratio and the fractional excretion of sodium assist to distinguish pre-renal failure from renal and post-renal failure.

Pre-renal failure

  • Blood loss
  • Septicaemia
  • Shock
  • Dehydration

 

Renal failure

 

Post-renal failure

  • Urinary tract obstruction