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Journal of Ultrasound in Medicine, Vol 18, Issue 5 357-361, Copyright © 1999 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Resistive indices in the evaluation of infants with obstructive and nonobstructive pyelocaliectasis

A. Vade, C. Dudiak, P. McCarthy, D. A. Hatch and P. Subbaiah
Department of Radiology, Loyola University Medical Center, Maywood, IL 60153, USA.

Diagnosing obstructive uropathy by renal resistive indices calculated from duplex Doppler sonographic waveforms has been supported as well as challenged in the radiology literature relating to adults. Despite reports of normally higher resistive indices in children as compared to adults, two studies have documented high sensitivity and specificity of renal Doppler sonography in the diagnosis of obstructive uropathy in children, using the same discriminatory criterion of a resistive index of 0.7 or greater as used in adults. We evaluated 43 infants with significant or bilateral pyelocaliectasis secondary to both obstructive and unobstructive uropathy and found no significant difference in the mean resistive indices or the mean difference in resistive indices of two kidneys in one patient. We conclude that Doppler sonography in infants has no value in differentiating obstructive from nonobstructive pyelocaliectasis.


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M. E. Tublin, R. O. Bude, and J. F. Platt
The Resistive Index in Renal Doppler Sonography: Where Do We Stand?
Am. J. Roentgenol., April 1, 2003; 180(4): 885 - 892.
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