title: Intrarenal backflow during retrograde pyelography with graded intrapelvic pressure. A pathoanatomic study.
abstract: Histologic examination was performed in 21 baby-pig kidneys after retrograde pyelography with a mixture of meglumine sodium diatrizoate and Ferritin at intrapelvic pressures of either 30-35 or 70-75 mm Hg. In further 4 kidneys light microscopy was done after retrograde pyelography with a mixture of barium sulfate and gelatin at an intrapelvic pressure of 70-75 mm Hg. The primary pathway for intrarenal backflow was canalicular. The contrast material entered the interstitium only by one route: Tubular leakage. Only in the central portions of the kidney leakage was seen. Interstitial Ferritin was found more frequently in areas with intrarenal backflow at an intrapelvic pressure of 70-75 mm Hg than of 30-35 mm Hg.
mesh_terms: D000818:Animals; D001466:Barium Sulfate; D003974:Diatrizoate Meglumine; D004195:Disease Models, Animal; D005293:Ferritins / Q000032:analysis; D007668:Kidney / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology; D007681:Kidney Papillary Necrosis / Q000473:pathology; D011312:Pressure; D011859:Radiography; D013552:Swine; D014718:Vesico-Ureteral Reflux / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology
chemical_list: D001466:Barium Sulfate; D003974:Diatrizoate Meglumine; D005293:Ferritins