Renal Nephrology Renal System

BUN:CR Ratio

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This is not a prescription. Using medicines without the guidance of a licensed provider  can be lethal.


  1. >20:1 prerenal.
    Example: dehydration
  2. 10-20:1 normal or postrenal.
    Example:kidney stones.
  3. <10:1 intrarenal.

Example: A TN, glomerulonephritis.


By Drbeen

Improving clear concept at a time!

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