ratio of renal plasma flow to kidney weight renal plasma flow (PAH) ratio of renal plasma flow to kidney weight (PAH) A calculated measurement in which the renal plasma flow rate (RPF) is divided by weight (i.e. the heaviness or the degree to which an object is drawn toward the earth by gravity) of one kidney and presented as a ratio, fraction, quotient or percentage. The RPF is the amount of plasma that perfuses the renal tubules per unit time, derived by measurement of the clearance rate of the non-metabolizable solute para-aminohippurate (PAH). ratio of RPF to kidney weight (PAH) CMO:0003686 clinical_measurement_ontology VT:0002847 slaulede RGD:25314254 2021-03-30T12:04:41Z