Comparative evaluation of the results of a comprehensive survey of children with congenital obstruc-tive uropathy revealed that children with congenital hydronephrosis, obstructive and reflux megaureter I de-gree obstruction of the functional state of the kidneys do not suffer. At the II degree obstruction of the func-tional state of the renal parenchyma is not deteriorating significantly, this is confirmed by the lack of trust differences dopplerographic (the IR), rentganplanimetry (RKI and PI) indices with normative data. When III degree of obstruction there is a violation of kidney function on the affected side, this translates into a signifi-cant reduction of the renal parenchym and the increase in rates on US IR, lower PI values at the excretory urograms.