Dialysis Adequacy: What is URR?
What is a Urea Reduction Ratio (URR) and how does it measure the adequacy of hemodialysis?
URR is one method to discover how much cleaner your blood is after dialysis. This is known as dialysis adequacy. A blood test that measures the blood urea nitrogen (BUN) is performed at the beginning and at the closing stages of your hemodialysis treatment. The amount of urea in these two blood samples is compared to see how much was removed during dialysis.
So, if you have a URR of 65%, it means your blood is 65% cleaner than when you began the dialysis treatment.
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