[Extra-corporeal lithotripsy (EDAP LT 01) in urinary lithiasis]

Five hundred and twenty six extracorporeal lithotripsies have been performed for renal and ureteric stones. Using low frequencies (1.25 to 2.5 cycles per second), extracorporeal lithotripsy was performed without anaesthesia and without premedication in 85% of cases. 91.9% of patients treated were followed and reviewed after one and three months: 292 (55%) were successes, 124 (22.5%) obtained partial results, 122 (22.5%) were failures. The best results were obtained in stones less than 20 mm in diameter. The results could only be improved by a second session of extracorporeal lithotripsy. Scintigraphic scars observed after high frequency lithotripsy and not observed after low frequency lithotripsy were again seen after renewal of the firing head.