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01-01-2021 | Original Article

Evaluation of flexible ureteroscope with an omni-directional bending tip, using a JOYSTICK unit (URF-Y0016): an ex-vivo study

Authors: T. Inoue, S. Okada, S. Hamamoto, H. Miura, J. Matsuzaki, M. Tambo, H. Fukuhara, M. Fujisawa, T. Matsuda, K. Nutahara

Published in: World Journal of Urology | Issue 1/2021

Abstract

Purpose

To compare the range of reach of our newly designed omni-directional ureteroscope (URF-Y0016), compared to the commonly used URF-P6, FlexX2s, and LithoVue™ scopes, in the upper, middle, and lower calyces in an ex-vivo pyelocaliceal model.

Methods

We fabricated a three-dimensional pyelocaliceal model of the upper, middle, and lower pole calyces using urethane and acrylic resin. The inner surface of the dome of each calyx was engraved with reference lines along eight directions, set at 10° of latitude from the top to the base of the dome, and at angles of 0–90°, to precisely determine the range of reach of each scope. The main feature of the URF-Y0016 scope is the omni-directional bending of the tip of the flexible ureteroscope, with the control of these four directions integrated into a handgun-type control unit with a joystick. The range of reach within each calyx was measured by four expert surgeons.

Results

The URF-Y0016 scope provided a greater range of reach along all directions in the lower pole calyx compared to URF-P6, FlexX2s, and LithoVue™ scopes (p < 0.001), particularly along the anterior–posterior direction in the lower lobe calyx. However, the URF-Y0016 scope did not influence the improvement of reach range in the upper and middle pole calyx compared to URF-P6, FlexX2s, and LithoVue™ scopes (p = 0.08, p = 0.296).

Conclusion

The novel design of the URF-Y0016 could improve treatment outcomes for calyceal stones in the lower pole in practice.

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Title: Evaluation of flexible ureteroscope with an omni-directional bending tip, using a JOYSTICK unit (URF-Y0016): an ex-vivo study
Authors: T. Inoue
S. Okada
S. Hamamoto
H. Miura
J. Matsuzaki
M. Tambo
H. Fukuhara
M. Fujisawa
T. Matsuda
K. Nutahara
Publication date: 01-01-2021
Publisher: Springer Berlin Heidelberg
Published in: World Journal of Urology / Issue 1/2021
Print ISSN: 0724-4983
Electronic ISSN: 1433-8726
DOI: https://doi.org/10.1007/s00345-020-03151-w

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Evaluation of flexible ureteroscope with an omni-directional bending tip, using a JOYSTICK unit (URF-Y0016): an ex-vivo study

Abstract

Purpose

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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