[Role of color Doppler echography in the diagnosis of obstructive uropathy]
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Updated: Aug 9, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
M R Mastidoro1, M Palladino, A Perta
1Servizio di Radiologia, IRCCS-Casa Sollievo della Sofferenza, San Giovanni Rotondo, FG.
Abstract:
Intrarenal Doppler US was performed in 20 patients with suspected renal obstruction and standard sonographic appearance of collecting-system dilatation. In 15 patients with true renal obstruction the resistive index (I.R.) was > 0.7. The A.A. think duplex Doppler US is a valuable addition to the standard sonographic evaluation to increase the diagnostic accuracy in patients with suspected renal obstruction.
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