Summary—Since the installation of an extracorporeal shock wave lithotriptor (ESWL) unit 12 months ago, 2000 lithotripsy procedures have been performed. Overall, 68.4% of patients were stone‐free by the end of the first month. Residual lithiasis (fragments0.5 cm) was observed in 10.1%. Complications were obstruction, infection, headache due to the epidural anaesthesia, anuria, renal failure, perirenal haematoma and cardiac arrest. A number of patients required additional operative treatment; this was always endoscopic and no open procedures were performed. Hospitalisation averaged 1