Diuretic Urography in the Assessment of Obstruction of the Pelvi-Ureteric Junction

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Abstract
Twenty adult patients with urographic evidence of unilateral, moderately wide renal pelves were examined by routine and diuretic urography. Planimetry of the corresponding calyx system of the 2 examinations was performed. An increase in size by > 20% following osmotic diuresis indicated an obstruction of the pelvi-ureteric junction in kidneys with moderately wide renal pelves. Diuretic urography may be useful to diagnose obstruction as a cause of moderately wide renal pelves and to assess operative results.