title: Obstructive nephropathy: successful evaluation with radionuclides.
abstract: A non-invasive test of nephron function, the renal parenchymal transit time (P.T.T.) index, is shown to be as accurate as antegrade pressure measurements in diagnosis of renal outflow obstruction. It is more sensitive than conventional methods of demonstrating the associated obstructive nephropathy. P.T.T. is useful in following the effects of surgery, or of temporising, in patients with confirmed or potential outflow tract obstruction. Renal radionuclide P.T.T. analysis gives the functional information essential for the management of patients in whom intravenous urography reveals a dilated renal pelvis.
mesh_terms: D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D007677:Kidney Function Tests / Q000379:methods*; D007682:Kidney Pelvis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008297:Male; D009399:Nephrons / Q000503:physiopathology*; D004369:Pentetic Acid; D011877:Radionuclide Imaging; D013667:Technetium
chemical_list: D013667:Technetium; D004369:Pentetic Acid