Abstract
The total plasma clearance and the renal clearance of inulin were measured in 60 patients after three to five hours of inulin infusion. The total plasma clearance was on average 18 ml/minute higher than the renal clearance. The urinary recovery of inulin was significantly correlated to the ratio plasma clearance/renal clearance. A correlation was found between diuresis and the extracellular fluid volume.