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Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes

Publication ,  Journal Article
Wilson, WT; Eberhart, RC; Preminger, GM
Published in: Journal of Endourology
January 1, 1990

In vitro studies with four flexible deflectable ureterorenoscopes were conducted for flow, pressure, and deflection characteristics. Various modes of irrigation were implemented including gravity, hand (syringe), and roller pump (Uromat). The addition of a 3.0F instrument in the working port of a 3.6F flexible ureterorenoscope resulted in a hydraulic resistance 1300 times greater than baseline (no instrument present). The same 3.0F instrument in a 4.0F channel increased resistance to 264 times control. The resistance to flow was significantly reduced if a 2.5F or 2.0F instrument or a 0.7F laser fiber was placed in the working port. Mechanical irrigation (either by hand or with the roller pump) was required to overcome these high resistances and provide an adequate flow of irrigation fluid. We found the combination of a 4.0F working port, smaller inserted instruments (2.0F-2.5F), and the addition of a mechanical form of irrigation to be optimal in terms of irrigant flow and visibility during flexible ureterorenoscopy. © 1990, Mary Ann Liebert, Inc. All rights reserved.

Duke Scholars

Published In

Journal of Endourology

DOI

EISSN

1557-900X

ISSN

0892-7790

Publication Date

January 1, 1990

Volume

4

Issue

3

Start / End Page

283 / 289

Related Subject Headings

  • Urology & Nephrology
  • 3202 Clinical sciences
  • 1103 Clinical Sciences
 

Citation

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ICMJE
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Wilson, W. T., Eberhart, R. C., & Preminger, G. M. (1990). Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes. Journal of Endourology, 4(3), 283–289. https://doi.org/10.1089/end.1990.4.283
Wilson, W. T., R. C. Eberhart, and G. M. Preminger. “Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes.” Journal of Endourology 4, no. 3 (January 1, 1990): 283–89. https://doi.org/10.1089/end.1990.4.283.
Wilson WT, Eberhart RC, Preminger GM. Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes. Journal of Endourology. 1990 Jan 1;4(3):283–9.
Wilson, W. T., et al. “Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes.” Journal of Endourology, vol. 4, no. 3, Jan. 1990, pp. 283–89. Scopus, doi:10.1089/end.1990.4.283.
Wilson WT, Eberhart RC, Preminger GM. Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes. Journal of Endourology. 1990 Jan 1;4(3):283–289.
Journal cover image

Published In

Journal of Endourology

DOI

EISSN

1557-900X

ISSN

0892-7790

Publication Date

January 1, 1990

Volume

4

Issue

3

Start / End Page

283 / 289

Related Subject Headings

  • Urology & Nephrology
  • 3202 Clinical sciences
  • 1103 Clinical Sciences