The place of diuretic enhanced Doppler sonography in distinguishing between obstructive and non-obstructive hydronephrosis in children

Objective: In an attempt to differentiate obstructive from non-obstructive dilation of the renal collecting system in children, a prospective clinical study was carried out. Material and Methods: During duplex Doppler sonogra phy examination in 23 children resistive index (RI) and pulsatility index ( PI) and RI ratio values before and after intraverous furasemide administrat ion were compared with the findings obtained with diuretic renogram examina tion (t1/2). Results: Evaluation of the results demonstrated that diuresis RI and PI determination may aid differentiation of severely obstructed rena l units from those with slight (equivocal) or no obstruction. Conclusion: K idneys with severe UPJ obstruction tended to have more elevated RI and PI v alues than the non-obstructed or equivocally obstructed ones. Again, determ ination of RIR values for each kidney showed the same elevation in severely obstructed kidneys, while non-obstructive or indeterminately obstructed on es demonstrated statistically insignificant changes.