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Related Experiment Videos

Systematic evaluation of stone basket dimensions.

Manoj Monga1, Kari Hendlin, Courtney Lee

  • 1Department of Urologic Surgery, University of Minnesota, Minneapolis, Minnesota 55455, USA.

Urology
|June 9, 2004
PubMed
Summary

The N-Circle stone basket offers linear opening for better stone extraction control. Other baskets open exponentially, potentially complicating stone retrieval and increasing escape risk.

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Area of Science:

  • Urology
  • Medical Device Engineering

Background:

  • Urinary stone extraction relies on specialized retrieval baskets.
  • Optimizing basket design is crucial for successful stone removal and minimizing complications.

Purpose of the Study:

  • To evaluate 17 commercial stone baskets for favorable stone extraction characteristics.
  • To compare basket opening linearity and dimensions at target width.

Main Methods:

  • Seventeen commercial stone baskets were tested.
  • Maximal basket width was measured during opening under microscopic visualization.
  • Baskets were rated for opening linearity and length to reach 5 mm width.

Main Results:

  • Only the N-Circle basket demonstrated linear opening.

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  • Other baskets exhibited exponential opening patterns.
  • Tipless baskets reached target width faster than flat-wire or helical baskets.

    • Conclusions:

    • Linear basket opening, like the N-Circle, offers operators greater control.
    • Shorter basket excursion to target width improves field of view maintenance.
    • Larger basket dimensions post-closure may increase calculus escape risk.