Test Findings
Test Findings

Elevated Urea:Creatinine Ratio



  • A urea:creatinine ratio >100:1 is commonly used as a marker of prerenal renal failure. Any cause of isolated urea elevation may also elevate the ratio.
    • Causes of Elevated Urea:Creatinine Ratio

    • Prerenal renal failure - hypovolaemia, sepsis, renal venoconstriction
    • Dehydration
    • Protein load - GI bleed (especially upper GI), high protein diet
    • Catabolic state - trauma, sepsis, starvation, corticosteroids
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