[Computed tomographic and sonographic detection of renal and perirenal changes following shockwave lithotripsy].

The finding of a major haemorrhage after lithotripsy induced us to look at 42 patients undergoing extracorporeal lithotripsy by CT and by sonography, both before and after the procedure, in order to determine the frequency of bleeding. In 37 patients, significant bleeding was found in the perirenal tract and in Gerota's capsule. There were six small sub-capsular haematomas which were not found by sonography and two extensive renal haematomas.