Abstract
Excretory pyelograms are calculated using planimeter in seventy six cases of stone hydronephrosis, and these cases are divided into five grades in regard to the size, form and funktion of the kidney.
In twenty eight cases pyelograms before treatment are compared with those after taeatments, and in almost all cases these pyelograms returned to normal within one or two months.
In stone hydronephrosis every effort must be made to preserve the kidney substance.
