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Keywords:
Obstruction / Occlusion, Diagnostic procedure, Ultrasound-Colour Doppler, Ultrasound, Nuclear medicine conventional, Paediatric, Kidney, Arteries / Aorta
Authors:
A. H. Sarrami1, M. Riahinezhad2, M. Farghadani3; 1Isfahan, Is/IR, 2Isfahan/IR, 3NORTH FARABI/IR
DOI:
10.1594/ecr2016/C-0212
Aims and objectives
Duplex Doppler ultrasound is a safe and useful modality for evaluation of children with hydronephrosis.
It may be used to improve the ability of conventional ultrasound in distinguishing between obstructive and non-obstructive hydronephrosis.
Resistive index (RI) is the most valuable duplex index reflecting the renal obstructive conditions.
Diagnostic value of RI has been shown in the evaluation of hydronephrosis in children as well as in adults.
In children with unilateral ureteropelvic junction obstruction (UPJO) increase of RI in intraparenchymal arteries may be a noticeable finding.
However,
RI is an age dependent parameter and utility of the adult’s threshold value in young children can be misleading.
It has been shown that the utility of RI ratio and a comparison of RI values between the right and left kidneys are more reliable than using a RI cutoff value in the evaluation of children with unilateral obstruction.
In this study we assess the value of these indices as a non-ionizing convenient method for predicting the degree of obstruction in children with unilateral UPJO.