Evaluation of Obstructive Uropathy in Children.99mTc-DTPA Renography Studies under Conditions of Maximal Diuresis

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Abstract
Renographic studies under standardized conditions of maximal diuresis provoked by hypotonic saline infusion and frusemide were used in 17 patients with dilatation of the upper urinary tract in order to distinguish between obstructed and non-obstructed urinary tracts. Of the 6 patients who were obstructed on clinical and X-ray evidence only 3 showed an obstructed pattern on the renographic curves after maximal diuresis. After operation these 3 patients showed improvement in both renographic curve and functional images of the renal parenchyma. A new method of identifying the parenchymal area is described.