A Method for Measuring the Peripheral Blood Flow by Para-aminohippurate

A method for measuring the volume of the peripheral blood flow by using PAH was reported. The values of the plasma flow per 100 cc. of extracellular fluid in forearm per minute was 8.0-25.3 cc. (mean 15.2 cc.) in 22 normal individuals and 11.9-36.1 cc. (mean 18.3 cc.) in 10 hypertensive, and this method is supposed to be able to be applied clinically for estimating the blood flow in organs or tissues, where the assumption, that the mean concentration of PAH in the extracellular fluid is appro-ximately equal to the PAH concentration in the veins, can exist.