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URR is a simple method for assessing the quality of dialysis (a life-saving treatment used in the final stage of kidney failure). It is directly connected to the patient's outcome. The URR assesses the ability of the dialysis to eliminate the waste products from the blood.

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This urea reduction ratio (URR) calculator compares pre and post urea levels in order to quantify hemodialysis efficiency.

What Is the Urea Reduction Ratio? The Urea Reduction Ratio (URR) shows how much urea is in your blood when you start and finish a dialysis session. Your URR amount tells you and your dialysis medical team how well dialysis worked, and how much waste was cleaned from your body. How Is the URR Calculated?

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The urea reduction ratio (URR) is a dimensionless number used to quantify dialysis treatment adequacy. Where: Whereas the URR is formally defined as the urea reduction "ratio", in practice it is informally multiplied by 100% as shown in the formula above, and expressed as a percent.

2025年2月10日 · The calculation of the Urea Reduction Ratio (URR) involves measuring the concentration of urea in the blood before and after a dialysis session. The formula is URR = [(Upre – Upost) / Upre] × 100, where Upre represents the pre-dialysis urea level, and Upost indicates the post-dialysis level.