Flexible endoscopic deflectability: changes in deflectability using a variety of working instruments and laser fibers

Marc A. Beaghler; Michael W. Poon; Duane Baldwin

doi:10.1117/12.275081

22 May 1997 Flexible endoscopic deflectability: changes in deflectability using a variety of working instruments and laser fibers

Marc A. Beaghler, Michael W. Poon, Duane Baldwin

Author Affiliations +

Proceedings Volume 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII; (1997) https://doi.org/10.1117/12.275081
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

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.

Citation Download Citation

Marc A. Beaghler, Michael W. Poon, and Duane Baldwin "Flexible endoscopic deflectability: changes in deflectability using a variety of working instruments and laser fibers", Proc. SPIE 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII, (22 May 1997); https://doi.org/10.1117/12.275081

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