Clinical experience of extracorporeal shock wave lithotripsy(Dornier lithotriptor MPL 9000) for urinary calculi

Song, Ki Hak; Kim, Kwang Jin

Abstract

MPL 9000 lithotriptor may be characterized by ultrasonic localization, automatic target system, water cushion and under water spark gap generation of shock wave. In an effort to evaluate clinical efficiency of this machine, we analyzed therapeutic results of 250 cases of urinary calculi treated by extracorporeal shock wave lithotripsy (ESWL) using MPL 9000 lithotriptor. Technically it was difficult to visualize the upper ureter stones with ultrasonic scanning, so all of them were pushed up before treatment. For staghorn stones or large stones, percutaneous nephrolithotomy (PCNL) or ureteral stenting were performed before treatment selectively. The overall stone free rate. at 4 weeks after last session, was 89.2% while that of stones larger than 3cm was 50%. The complications such as gross hematuria, flank pain, steinstrasse and fever were controlled successfully by conservative treatment. In conclusion, ESWL with MPL 9000 might be successful in most patients with urolithiasis but in cases of large renal stone or upper ureteral stone auxiliary procedures will be required.