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The Radioisotope Renogram compared with Intravenous Pyelography as a Screening Test for Patients with Hypertension

Departments of Physics, Medicine, and Radiology, Guy's Hospital, London, S.E.1

This excerpt was created in the absence of an abstract.

One hundred and sixty-two patients with a sustained diastolic pressure of 110 mm of Hg or more were investigated with ¹³¹I renography and intravenous nephropyelography, 28 had arteriography, and 16 divided renal function studies. 20 per cent had abnormalities in both renogram and pyelography and one in three of these warranted surgical intervention. Bilateral symmetrical renal disease cannot be predicted on renography without simultaneous measurements of blood and bladder concentration. No false negatives were found compared with pyelography in the whole series. Renography corrected faulty observation and interpretation of nephropyelograms on three occasions. Renography provides a selection test of accuracy equal to nephro-pyelography for the detection of patients who require further investigation. It has the advantage of speed and a smaller radiation hazard.