Share Email Print
cover

Proceedings Paper

Flexible endoscopic deflectability: changes in deflectability using a variety of working instruments and laser fibers
Author(s): Marc A. Beaghler; Michael W. Poon; Duane Baldwin
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The purpose of this study is to measure the effects of different working instruments (EHL probes, baskets, and graspers) and holmium laser fibers on deflectability in a variety of actively deflectable flexible endoscopes. A bench top study was performed to determine the effects of working instruments and laser fibers on a variety of actively deflectable flexible endoscopes. Baseline deflection was measured with and without working instruments in the working channel and compared between various flexible endoscopes. In ureteroscopes, 1.6 F and 1.9 F EHL probes decreased deflection minimally (0 - 34 degrees). Working instruments larger than 1.9 F had a greater effect upon deflection (33 to 90 degrees). Improved deflectability was noted with the 200 micron holmium laser fiber compared to the 365 micron fiber. The diameter of the working instruments did not affect deflectability as severely in cystoscopes compared to ureteroscopes. No significant differences in deflection existed between the 365 micron and 200 micron holmium laser fibers in the flexible nephroscopes tested. In summary, working instruments less than 1.9 F and the 200 micron holmium laser fiber have little effect on deflectability. This may result in improved access to lower pole and dependent calyces. Flexible cystoscopes with their larger working channels and stronger deflection cables are less affected by working instrument diameter compared to flexible ureteroscopes.

Paper Details

Date Published: 22 May 1997
PDF: 4 pages
Proc. SPIE 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII, (22 May 1997); doi: 10.1117/12.275081
Show Author Affiliations
Marc A. Beaghler, Loma Linda Univ. School of Medicine (United States)
Michael W. Poon, Loma Linda Univ. School of Medicine (United States)
Duane Baldwin, Loma Linda Univ. School of Medicine (United States)


Published in SPIE Proceedings Vol. 2970:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII
R. Rox Anderson; Harvey Lui; Michail M. Pankratov; Kenneth Eugene Bartels; Gerhard J. Mueller; Graham M. Watson; Reza S. Malek; Lawrence S. Bass; Lloyd P. Tate; Hans-Dieter Reidenbach; Kenneth Eugene Bartels; R. Rox Anderson; Lawrence S. Bass; Aaron P. Perlmutter; Kenton W. Gregory; David M. Harris; David M. Harris; Harvey Lui; Reza S. Malek; Gerhard J. Mueller; Michail M. Pankratov; Aaron P. Perlmutter; Hans-Dieter Reidenbach; Lloyd P. Tate; Graham M. Watson, Editor(s)

© SPIE. Terms of Use
Back to Top