Abstract
A functional parameter of the radiorenogram, the uptake ratio, was compared with the bilateral renal clearance of inulin and PAH in a mixed surgical-urological material. For kidneys without signs of obstruction to the urine flow, a close correlation was observed over the whole range of kidney function, which indicated that the uptake ratio of the renogram measured the renal function quantitatively with reasonable accuracy. For kidneys with signs of urinary obstruction the corresponding correlation was poor, probably owing to the inherent difficulties in correct sampling of the urine from a dilated renal pelvis. This made the values obtained from the bilateral clearance very unreliable in these patients.
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