urea reduction ratio


Also found in: Acronyms, Wikipedia.

urea reduction ratio (URR)

the fractional reduction in blood urea nitrogen during a single hemodialysis session, expressed as a percent, measured to assess adequacy of hemodialysis.

urea reduction ratio

Nephrology The percent reduction in serum urea due to dialysis, an indicator of dialysis efficacy. Cf Kt/V.
References in periodicals archive ?
DaVita Improves URR by 64 Percent in 2011 - Urea Reduction Ratio (URR) is a measure of how effectively a dialysis treatment removes waste from the body and is commonly expressed as a percentage.