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Consecutive experience with four Dornier lithotripters: HM4, MPL 9000, compact, and U/50
1Department of Urology, Klina, Antwerp, Belgium. tailly@village.uunet.be
Journal of Endourology
|August 14, 1999
Summary
Extracorporeal shock wave lithotripsy (ESWL) treatments have become more effective over time. Improvements in imaging technology and treatment strategies have led to higher stone-free rates and fewer auxiliary procedures.
Area of Science:
- Urology
- Medical Technology
- Nephrology
Background:
- Since 1987, the Urology Department has utilized four Dornier lithotripters: HM4, MPL 9000X, Compact, and U/50.
- The HM4 and MPL 9000X are electrohydraulic, while the Compact and U/50 are electromagnetic lithotripters.
Purpose of the Study:
- To evaluate the evolution of extracorporeal shock wave lithotripsy (ESWL) effectiveness.
- To assess the impact of technological advancements and changing treatment strategies on ESWL outcomes.
Main Methods:
- Retrospective analysis of 1,744 cases treated with four different Dornier lithotripter models (HM4, MPL 9000X, Compact, U/50) from 1987 onwards.
- Comparison of treatment strategies, imaging modalities, stone-free rates, auxiliary procedure rates, and retreatment rates across different lithotripter generations.
Main Results:
- Stone-free rates showed a slight increase over time, reaching up to 88.7%.
- The auxiliary procedure rate significantly declined from 27.6% (HM4) to 10.8% (U/50).
- Improvements in imaging, targeting, stone size, and operator experience contributed to an enhanced Effectiveness Quotient.
Conclusions:
- While lithotripter power has not significantly increased, ESWL treatments have become substantially more effective.
- Technological integration, such as improved imaging, and refined treatment strategies are key drivers of enhanced ESWL efficacy.