Renal morphology and function immediately after extracorporeal shock-wave lithotripsy

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Abstract
The acute effects of extracorporeal shock-wave lithotripsy (ESWL) on morphology and function of the kidney were evaluated by excretory urography, quantitative radionuclide renography (QRR), and magnetic resonance imaging (MRI) in 33 consecutive patients. Excretory urograms demonstrated an enlarged kidney in seven (18%) of 41 treatments and partial or complete obstruction of the ureter by stone fragments after 15 (37%) of 41 treatments. Total effective renal plasma flow (ERPF) was not changed after ESWL, but the percentage ERPF of the treated kidney was decreased by more than 5% in 10 (30%) of 33 cases. QRR images showed partial parenchymal obstruction in 10 (25%) of 41 treated kidneys and total parenchymal obstruction in 9 (22%). MRI disclosed one or more of the following abnormalities in 24 (63%) of 38 treated kidneys: (1) loss of corticomedullary differentiation, (2) perirenal fluid, (3) subcapsular hematoma, (4) hemorrhage into a renal cyst, and (5) unexplained abnormalities. Treated kidneys were norma...

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