ratio of the effective renal plasma flow to the weight of both kidneys 2013-11-19T14:51:51Z A calculated measurement in which the effective renal plasma flow rate (eRPF) is divided by weight (i.e. the heaviness or the degree to which an object is drawn toward the earth by gravity) of both kidneys and presented as a ratio, fraction, quotient or percentage. The eRPF is 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). 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 to both kidney weight ratio effective renal plasma flow rate to both kidney weight ratio effective renal plasma flow