Diuresis Renography in Equivocal Urinary Tract Obstruction

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Abstract
Summary— A trial of the value of diuresis renography in equivocal upper urinary tract obstruction is presented. Fifty-two patients were examined by standard renorgraphy and renography under a diuretic provocation. The results indicate that the technique is of considerable value in making the vital distinction between dilatation on the excretion urogram due to atonicity and that caused by a genuine obstruction. A quantitative index of the response to diuresis reflecting the degree of impedance to flow is described—the Diuresis Excretion Index. Diuresis renography is recommended in the evauation of the patient with equivocal urinary tract obstruction.

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