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Endoscopic forceps for ureteroscopy: a comparative in vitro analysis.

Carl Sarkissian1, Giovanni Scala Marchini, Manoj Monga

  • 1Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH 44195, USA.

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Summary
This summary is machine-generated.

This study compared ureteroscopic graspers, finding significant differences in grip strength and ureteroscope deflection. These functional characteristics may predict how well different graspers perform in clinical settings.

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Area of Science:

  • Urology
  • Medical Devices
  • Surgical Instruments

Background:

  • Ureteroscopic stone removal is a common urological procedure.
  • The effectiveness of ureteroscopic stone removal depends on the performance of various surgical instruments, including graspers.
  • Different ureteroscopic graspers have varying designs and may exhibit distinct functional characteristics.

Purpose of the Study:

  • To objectively evaluate and compare the functional characteristics of several commonly used ureteroscopic graspers.
  • To assess opening dynamics, grip strength, safety profile (perforation force), and impact on ureteroscope deflection for different graspers.

Main Methods:

  • Five ureteroscopic graspers were tested: Captura, Platinum, TriClaw, Graspit, and Boston Scientific Tricep (multiple sizes).
  • Opening dynamics were assessed via high-resolution imaging.
  • Grip strength was measured by the force required to hold stone models.
  • Safety was evaluated by the force needed to perforate aluminum foil.
  • Impact on ureteroscope deflection was quantified by measuring maximum deflection and bending radius.

Main Results:

  • Tricep and Captura graspers achieved a 5 mm grasping width with the shortest opening distance.
  • TriClaw and Graspit demonstrated superior grip strength compared to other devices.
  • Captura and Tricep 2.4F required the highest forces for aluminum foil perforation, indicating a better safety profile.
  • Ureteroscope deflection was minimally affected by Tricep 2.4F, Graspit, and TriClaw graspers.

Conclusions:

  • Significant variations exist in the functional properties of ureteroscopic graspers, including opening dynamics, grip strength, perforation resistance, and impact on ureteroscope deflection.
  • These performance differences suggest that the choice of grasper may influence clinical outcomes in ureteroscopic procedures.