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Related Experiment Videos

Flexible ureteroscopes: a user's guide.

J Parkin1, F X Keeley, A G Timoney

  • 1Bristol Urological Institute, Southmead Hospital, Bristol, UK.

BJU International
|November 2, 2002
PubMed
Summary
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This study compared four flexible ureteroscopes, finding objective similarities but significant user-rated qualitative differences. Endourologists should test different ureteroscopes before selection, considering factors like durability and cost.

Area of Science:

  • Urology
  • Medical Devices
  • Endoscopy

Background:

  • Flexible ureteroscopes are crucial tools in urological procedures.
  • Small-diameter flexible ureteroscopes enable minimally invasive treatments.
  • Comparing these devices is essential for optimizing clinical outcomes.

Purpose of the Study:

  • To quantitatively and qualitatively compare four small-diameter flexible ureteroscopes from different manufacturers.
  • To assess key performance metrics and user satisfaction.

Main Methods:

  • Four flexible ureteroscopes (<9 F tip) were evaluated.
  • Quantitative assessment included active tip deflection and irrigation flow rate.
  • Qualitative assessment involved two endourologists scoring insertion, deflection, maneuverability, rigidity, image quality, and overall satisfaction using a visual analogue scale.

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Main Results:

  • Objective measurements showed tip deflection within 87-100% of specifications and comparable irrigation flow rates, except for the Wolf (4 F channel).
  • Image quality and field of view were similar, with the Wolf having a narrower field of view (60 vs. 90 degrees).
  • User satisfaction varied significantly, with Olympus (8.6) and ACMI (7.5) scoring highest, while Storz (4) and Wolf (1.9 vs. 5.3) showed lower or disputed scores.

Conclusions:

  • While objective performance metrics were similar, subjective user assessments revealed significant qualitative differences among flexible ureteroscopes.
  • Endourologists should personally test different ureteroscopes to determine the best fit for their needs.
  • Factors beyond performance, such as durability, cost, and service, are critical considerations in ureteroscope selection.