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Endoscopic Stone Measurement During Ureteroscopy.

Wesley W Ludwig1, Sunghwan Lim2, Dan Stoianovici1,2

  • 11 Department of Urology, The James Buchanan Brady Urological Institute, School of Medicine, Johns Hopkins University , Baltimore, Maryland.

Journal of Endourology
|November 1, 2017
PubMed
Summary
This summary is machine-generated.

A new software accurately measures stone fragment size during flexible ureteroscopy (URS). This tool enhances stone removal precision, potentially making URS procedures safer and more efficient for patients.

Keywords:
flexible ureteroscopynephrolithiasisstone measurement

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Area of Science:

  • Urology
  • Medical Imaging
  • Software Development

Background:

  • Accurate intraoperative stone size measurement is currently not feasible during flexible ureteroscopy (URS).
  • This limitation impacts surgical decision-making and the efficiency of stone removal procedures.

Purpose of the Study:

  • To develop and evaluate novel software for accurate stone fragment size measurement during URS.
  • To assess the performance and reliability of this ureteroscopic measurement tool.

Main Methods:

  • A novel software application was designed to measure stone fragment size based on the ureteroscope's basket tip.
  • URS procedures were recorded, and 30 extracted stone fragments were measured using digital calipers for comparison.
  • The software was applied to recorded footage to derive stone size measurements, which were then compared to actual measurements.

Main Results:

  • The software demonstrated high accuracy and precision, with median longitudinal and transversal errors of 0.14 mm and 0.09 mm, respectively.
  • Overall software accuracy was 0.17 mm and precision was 0.15 mm.
  • Measurements derived from the software showed a high correlation with digital caliper measurements (r = 0.97 and 0.93).

Conclusions:

  • The developed software reliably measures stone fragment size during flexible ureteroscopy.
  • This novel technology has the potential to improve the safety and efficiency of URS procedures.