Application of hollow glass waveguides in urological treatment

Michal Nemec; Petr Koranda; Helena Jelinkova; Oto Kohler; Pavel Drlik; Mitsunobu Miyagi; Yi-Wei Shi; Yuji Matsuura

doi:10.1117/12.588908

23 March 2005 Application of hollow glass waveguides in urological treatment

Michal Nemec, Petr Koranda, Helena Jelinkova, Oto Kohler, Pavel Drlik, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 5691, Optical Fibers and Sensors for Medical Applications V; (2005) https://doi.org/10.1117/12.588908
Event: SPIE BiOS, 2005, San Jose, CA, United States

Abstract

The application of specially designed delivery system consisted of cyclic olefin polymer coated silver hollow glass waveguide (inner/outer diameter 700/850 μm) with protector in one side and sealed cap in the output is shown for treatment of ureter wall perforation by Er:YAG laser radiation. For this purpose Er:YAG laser system (wavelength 2.94 μm) working in free-running and Q-switched regime was utilized. The basic characteristic of the interaction of Er:YAG laser radiation with the ureter surface and its deep structures was found. Maximum interaction pulse energy and length in free-running regime were 100 mJ and 200 μs, respectively (corresponding intensity 130kW.cm^-2). Maximum interaction pulse energy and length in Q-switched regime were 30 mJ and 70 ns, respectively (corresponding intensity 111 MW.cm^-2). From the histological evaluation it follows that the application of Q-switched Er:YAG laser radiation on ureter tissue resulted in minimum tissue alteration without any influence on the deeper layers.

Citation Download Citation

Michal Nemec, Petr Koranda, Helena Jelinkova, Oto Kohler, Pavel Drlik, Mitsunobu Miyagi, Yi-Wei Shi, and Yuji Matsuura "Application of hollow glass waveguides in urological treatment", Proc. SPIE 5691, Optical Fibers and Sensors for Medical Applications V, (23 March 2005); https://doi.org/10.1117/12.588908

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