[Separate evaluation of left and right-sided renal function (author's transl)]

The PAH extraction of the kidneys was determined separately on each side after catheterisation of both renal veins and the femoral artery during PAH infusion in eleven patients with normal or diminished renal function due to bilateral renal disease and in five patients with only one kidney with normal or diminished renal function. A significant positive correlation was found between PAH extraction and inulin clearance and a significant negative correlation between PAH extraction and the log of the serum creatinine. PAH extraction is a suitable method for quantitative evaluation of right and left renal function.