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Proceedings Paper

Application of hollow glass waveguides in urological treatment
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Paper 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.

Paper Details

Date Published: 23 March 2005
PDF: 9 pages
Proc. SPIE 5691, Optical Fibers and Sensors for Medical Applications V, (23 March 2005); doi: 10.1117/12.588908
Show Author Affiliations
Michal Nemec, Czech Technical Univ. (Czech Republic)
Petr Koranda, Czech Technical Univ. (Czech Republic)
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Oto Kohler, Central Military Hospital (Czech Republic)
Pavel Drlik, Central Military Hospital (Czech Republic)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 5691:
Optical Fibers and Sensors for Medical Applications V
Israel Gannot, Editor(s)

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