ABSTRACT
In hydronephrosis, it is very important for its management to determine. RI value using Doppler sonography is one of the least invasive modality available for differentiating the obstructed from the nonobstructed dilated upper urinary tract and particularly useful in following the patient who has hydronephrosis. However its normal value and discriminating point were not established yet in children. To assess better utility of RI in diagnosis of obstructive hydronephrosis, we evaluated 66 undilated renal units with the intention of establishing a nomogram of RI values in children. There was no significant relationship between the RI values and age, sex or laterality Overall mean of RI value was 0.74+/-0.07 in this study and 22 of 66 undilated kidneys (33.3%) had RI values above 0.7, which has thought to be discriminatory value in adult. We think that RI values of normal kidneys need to be evaluated further in children.