Aminohippuric acid or para-aminohippuric acid ( PAH ) is a diagnostic agent useful in medical tests involving the kidney used in the measurement of renal plasma flow .
Para-aminohippuric acid ( PAH ) is a derivative of hippuric acid .
Aminohippuric acid or para-aminohippuric acid ( PAH ) , a derivative of hippuric acid , is a diagnostic agent useful in medical tests involving the kidney used in the measurement of renal plasma flow .