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Experience with a New Multifunctional Lithotripter, the Dornier MFL 5000: Results of 415 Treatments

  • Jurgen Graff
  • S. Benkert
  • J. Pastor
  • T. Senge

Abstract

The Dornier MFL 5000 is a new, multifunctional work station for urologie diagnosis, endourology and extracorporeal shock wave lithotripsy (ESWL*). Features of this bath-free device include a tiltable U-arm with an under-table x-ray tube for stone localization, a low-pressure generator with twin-pulse technique, modified semi-ellipsoid reflector, and an ultrasound unit for stone localization and monitoring. From April 1988 until January 31, 1989, 415 ESWL treatments were performed. The stones were 45.6% (189) calyceal, 25% (108) renal pelvis, 26% (108) ureteral, and 2.4% (10) branched calculi. The majority of stones had a diameter between 8 mm and 20 mm. Stone disintegration required a mean of 2,450 impulses. Mean treatment time was 33 minutes. Mean final generator voltage was 20 kV (range, 17 kV to 24 kV). Post-ESWL ancillary procedures proved to be necessary in 24 patients (5.8%). The retreatment rate was 19.5% (81) including 4.8% (20) with planned multiple treatments. In 86.6% (359) of patients a noninvasive oral analgesia technique was used successfully. Follow-up at three months could be obtained in 59.5% (247). Overall stone-free rate was 77.5% (191). ESWL was unsuccessful in 2.4% (10).

The results of this study are comparable to those achieved with a modified Dornier HM3. The MFL 5000 has advantages, especially in the treatment of lumbar ureteral stones in situ, less radiopaque stones, and in obese patients. The under-table x-ray tube considerably reduces radiation exposure to room personnel and the treating urologist. Excellent imaging qualities are provided by the 14-inch image intensifier. The MFL 5000 proved to be satisfactory for a variety of endourologic procedures.

Keywords

Extracorporeal Shock Wave Lithotripsy Ureteral Stone Percutaneous Nephrolithotomy Excellent Imaging Quality Stone Localization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science+Business Media New York 1989

Authors and Affiliations

  • Jurgen Graff
    • 1
  • S. Benkert
    • 1
  • J. Pastor
    • 1
  • T. Senge
    • 1
  1. 1.Urologische Klinik der Ruhr-Universitat BochumMarienhospitalHerneWest Germany

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