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Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes.

Publication ,  Journal Article
Winship, B; Wollin, D; Carlos, E; Li, J; Preminger, GM; Lipkin, ME
Published in: J Endourol
February 2019

INTRODUCTION AND OBJECTIVES: Single-use flexible ureteroscopes are increasingly popular because of high repair costs of reusable ureteroscopes. As new single-use ureteroscopes enter the market, the consistency of performance of these devices has been questioned. Our objective was to compare two single-use ureteroscopes: the Pusen PU3022a (Zhuhai Pusen) and the LithoVue (Boston Scientific) with emphasis on physical and optical performance consistency. METHODS: Ten LithoVue and 10 Pusen ureteroscopes were evaluated in never-used condition. The following parameters were recorded: maximal tip deflection with an empty working channel, 200 μm laser fiber, and 1.9F basket; image resolution at 10, 20, and 50 mm; and irrigation flow rate; all ureteroscopes were then fully deflected for 200 cycles. Maximum deflection was remeasured. Mean values for each parameter were compared. To examine within-manufacturer consistency, the variance was calculated and an F-test performed to evaluate for equivalence. RESULTS: Both ureteroscopes provided max deflection over 270°. The Pusen flexed to a greater degree than LithoVue. The Pusen lost more deflection with a laser fiber in the working channel. LithoVue had higher resolution at 10 mm, but the ureteroscopes were similar at 20 and 50 mm. Although the working channel diameter is identical, irrigation flow was higher with the Pusen. However, its working channel was 7 cm shorter than LithoVue. After 200 cycles of deflections, LithoVue had less deflection loss, although one ureteroscope was excluded from analysis because of mechanical failure. Variability was minimal and not significant between manufacturers at all measured parameters. CONCLUSIONS: LithoVue and the newer PU3022a have similar "out-of-the-box" performance characteristics and seem durable. These two single-use flexible ureteroscopes performed consistently regardless of the manufacturer.

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Published In

J Endourol

DOI

EISSN

1557-900X

Publication Date

February 2019

Volume

33

Issue

2

Start / End Page

127 / 131

Location

United States

Related Subject Headings

  • Urology & Nephrology
  • Urolithiasis
  • Ureteroscopy
  • Ureteroscopes
  • Humans
  • Equipment Design
  • 3202 Clinical sciences
  • 1103 Clinical Sciences
 

Citation

APA
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ICMJE
MLA
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Winship, B., Wollin, D., Carlos, E., Li, J., Preminger, G. M., & Lipkin, M. E. (2019). Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes. J Endourol, 33(2), 127–131. https://doi.org/10.1089/end.2018.0805
Winship, Brenton, Daniel Wollin, Evan Carlos, Jingqiu Li, Glenn M. Preminger, and Michael E. Lipkin. “Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes.J Endourol 33, no. 2 (February 2019): 127–31. https://doi.org/10.1089/end.2018.0805.
Winship B, Wollin D, Carlos E, Li J, Preminger GM, Lipkin ME. Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes. J Endourol. 2019 Feb;33(2):127–31.
Winship, Brenton, et al. “Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes.J Endourol, vol. 33, no. 2, Feb. 2019, pp. 127–31. Pubmed, doi:10.1089/end.2018.0805.
Winship B, Wollin D, Carlos E, Li J, Preminger GM, Lipkin ME. Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes. J Endourol. 2019 Feb;33(2):127–131.
Journal cover image

Published In

J Endourol

DOI

EISSN

1557-900X

Publication Date

February 2019

Volume

33

Issue

2

Start / End Page

127 / 131

Location

United States

Related Subject Headings

  • Urology & Nephrology
  • Urolithiasis
  • Ureteroscopy
  • Ureteroscopes
  • Humans
  • Equipment Design
  • 3202 Clinical sciences
  • 1103 Clinical Sciences