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Related Experiment Videos

Lithotripsy as an outpatient service.

J M Gray1

  • 1Waikato Lithotripsy Services Ltd, Hamilton.

The New Zealand Medical Journal
|June 26, 1991
PubMed
Summary

Hamilton

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Area of Science:

  • Urology
  • Nephrology
  • Medical Technology

Background:

  • Introduction of a novel lithotripsy outpatient service in Hamilton, New Zealand.
  • Treatment of renal calculi (kidney stones) in a diverse patient population across New Zealand.

Purpose of the Study:

  • To evaluate the effectiveness and outcomes of the new lithotripsy service.
  • To assess complication rates and treatment failures associated with renal calculus management.

Main Methods:

  • Retrospective analysis of 452 patients treated for renal calculi between April 1989 and July 1990.
  • Three-month follow-up to determine stone fragment clearance rates based on initial stone size.
  • Documentation of post-treatment complications and treatment failures.

Main Results:

  • Complete clearance of residual fragments (<2 mm) achieved in 70% of patients with stones <20 mm in diameter.
  • Clearance rate decreased to 50% for stones >20 mm in diameter.
  • Medical assistance was required for complications in 7% of patients; 21 patients experienced treatment failure (undetected or disintegrated stones).

Conclusions:

  • Lithotripsy is an effective outpatient treatment for renal calculi, with higher success rates for smaller stones.
  • Stone size is a significant factor influencing treatment efficacy.
  • The service demonstrated a manageable complication rate and identified areas for potential improvement in stone detection and disintegration.

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