[Postnatal differential diagnosis of fetal ureteropelvic dilatation]. / Diagnóstico diferencial postnatal de la dilatación pielocalicial fetal.

ABSTRACT

UNLABELLED A clinical study of 51 children with prenatal diagnosis of pielocaliceal dilatation with 65 kidney affected is done. The objective was to assess the accuracy of the postnatal diagnostic studies practiced in order to an early differentiation between obstructive and non obstructive dilatation. MATERIAL AND METHODS: There were evaluated ultrasonography (US), intravenous pielography and diuretic isotopic renogram. The data were statistically analyzed with SPSS program. A regression logistic analysis was carried out between all the significant variables in order to identify the obstruction risk factors. Also the probabilities calculated index and the sensibility and specificity were studied. RESULTS: The obstruction risk factors were grade III dilatation or greater in the US, differential renal function less of 40%, and half time more than 21 minutes. The probabilities calculated index showed that the probabilties of obstruction are different according to the number of obstruction risk factors presented in every patient. Risk factors have a high sensibility and specificity as diagnostic test.