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Related Experiment Videos

Modulith SL 10/20--experimental introduction and first clinical experience with a new interdisciplinary lithotriptor.

J Rassweiler1, U Köhrmann, G Heine

  • 1Department of Urology, Klinikum Mannheim, University of Heidelberg, FRG.

European Urology
|January 1, 1990
PubMed
Summary

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A new electromagnetic lithotriptor effectively disintegrates kidney and biliary stones in 95% of patients, offering a promising advancement in extracorporeal shock-wave lithotripsy treatments.

Area of Science:

  • Urology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Numerous second-generation lithotriptors exist for extracorporeal shock-wave lithotripsy (ESWL).
  • Despite technical advancements, existing ESWL machines have limitations.
  • A novel lithotriptor was developed collaboratively to address these shortcomings.

Purpose of the Study:

  • To evaluate the efficacy and safety of a new electromagnetic lithotriptor for stone disintegration.
  • To determine optimal energy settings for various stone types and locations.

Main Methods:

  • Utilized an electromagnetic cylinder with a paraboloid reflector (40 cm) for focusing.
  • Employed a water cushion and acoustic cradle for patient coupling and positioning.
  • Integrated coaxial ultrasound and a C-arm with pulsed fluoroscopy for stone localization.

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Main Results:

  • Treated 137 stones in 88 patients, achieving successful disintegration in 95% (83 patients).
  • Mean generator voltage was 16 kV, with an average of 2,359 impulses per treatment.
  • Successfully treated 12 patients with biliary calculi, including gallstones and bile duct stones.

Conclusions:

  • The new electromagnetic lithotriptor demonstrates high success rates for urinary and biliary stone disintegration.
  • The device offers a wide pressure range and precise focusing, improving ESWL outcomes.
  • Further clinical application is warranted to establish its full therapeutic potential.