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Comparison of Empower and M-arm for One-surgeon Basketing in Ureteroscopic Lithotripsy: A Simulator Study by Non-doctors

  • Makoto Taguchi
    Correspondence
    Address correspondence to: Makoto Taguchi, M.D., Department of Urology and Andrology, Kansai Medical University, 2-5-1 Shinmachi, Hirakata, Osaka, Japan 573-1010.
    Affiliations
    Department of Urology, Osaka Saiseikai Izuo Hospital Based on Social Welfare Organization “Saiseikai” Imperial Gift Foundation Inc., Osaka, Japan

    Department of Urology and Andrology, Kansai Medical University, Osaka, Japan
    Search for articles by this author
  • Hidefumi Kinoshita
    Affiliations
    Department of Urology and Andrology, Kansai Medical University, Osaka, Japan
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Published:November 15, 2022DOI:https://doi.org/10.1016/j.urology.2022.10.025

      Abstract

      Objective

      To compare the Empower and M-arm for stone retrieval during ureteroscopic lithotripsy in a simulator.

      Methods

      We used flexible ureteroscopy to compare use of the Empower and use of the M-arm, both of which are one-surgeon basketing techniques. LithoVue and ZeroTip stone extraction devices were used. All participants were nurses who had never handled a ureteroscope. They retrieved 3 stones in the simulator using the Empower or M-arm. We compared the stone retrieval time, number of times the retrieval device was opened and closed, number of times the line of sight was removed from the endoscope monitor, number of times the participant lost sight of a stone, and participants’ subjective evaluations.

      Results

      The stone retrieval time was significantly shorter with the Empower than M-arm (10.0 vs. 19.9 min, respectively; P = .02). The mean number of times the retrieval device was opened and closed and the mean number of times the line of sight was removed from the endoscope monitor were significantly lower with the Empower (24 vs. 53 times, P = .01 and 3.1 vs. 51.5 times, P < .001, respectively). The mean number of times the participant lost sight of a stone tended to be lower with the Empower (9.4 vs. 25.3, P = .06). All participants indicated that the Empower is better for stone retrieval by beginners.

      Conclusion

      The Empower reduces the stone retrieval time compared with the M-arm. We consider that the Empower has the potential to be useful in ureteroscopic lithotripsy.
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