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Related Experiment Videos

Experimental laboratory lithotripter: design, construction, and operation.

S R Akers1, F H Cocks

  • 1Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27706.

Biomedical Instrumentation & Technology
|January 1, 1989
PubMed
Summary

A novel laboratory lithotripter effectively comminutes kidney stones and gallstones using acoustic shockwaves. This cost-effective device offers broad energy levels for non-clinical lithotripsy research.

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Nephrology Research

Background:

  • Kidney stones and gallstones pose significant health challenges.
  • Current lithotripsy devices have limitations in energy range and cost.
  • Non-clinical research is crucial for advancing lithotripsy technology.

Purpose of the Study:

  • To design and construct a laboratory lithotripter for stone comminution.
  • To evaluate the device's effectiveness on human kidney stones.
  • To present the electrical and mechanical design of the novel lithotripter.

Main Methods:

  • A laboratory lithotripter was built using an elliptical reflector (eccentricity 4.7 cm).
  • Kidney stones and gallstones were placed at the second focus (f2).

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  • Acoustic shockwaves were generated via underwater spark discharge at the first focus (f1) with 3-52 joules of energy.

    • Main Results:

    • The lithotripter successfully comminuted human kidney stones.
    • The device's energy levels surpass those of some commercial clinical devices.
    • Quantitative results of stone comminution were obtained.

    Conclusions:

    • The developed laboratory lithotripter is effective for stone comminution.
    • The device's cost-effectiveness and adjustable energy levels make it suitable for non-clinical research.
    • This research contributes to the advancement of lithotripsy technologies.