effective renal plasma flow 2013-11-19T14:52:06Z A calculated measurement of the amount of plasma that perfuses the renal tubules per unit time, derived by measurement of the clearance rate of a non-metabolizable solute such as para-aminohippurate (PAH). The effective RPF is approximately 10% less than the actual RPF. Plasma is the fibrinogen-containing fluid portion of the blood in which the particulate components are suspended. The kidneys are the paired organs that function to maintain proper water and electrolyte balance, regulate acid-base concentration, and filter the blood of metabolic wastes. JSmith eRPF effective renal plasma flow rate calculated renal plasma flow