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Total renal plasma flow

Average values for total renal plasma flow (RPF), glomerular filtration rate (GFR), tubular reabsorption (REAB), and urine f low rate. RPF is equal to renal blood flow × (1 – Hematocrit). Note that GFR averages about 20% of the RPF, while urine flow rate is less than 1% of the GFR. Therefore, more than 99% of the fluid f iltered is normally reabsorbed. The filtration fraction is the GFR/RPF.