[Improving the diagnostic potentials of isotope nephrography with 131I-hippuran].

In order to eliminate the false positive and the false negative results in the control isotopic nephrographic examinations due to the minute diuresis determination of the difference between the time of appearance of T-maximum of both kidneys is recommended. When the earlier (respectively the later) appearance of T max. is due to improved (or deteriorated) renal function the difference between the two T max. increases (or decreases). When the change in the time of appearance of the two T max. is due to the minute diuresis the difference between them remains unchanged.