Application of hollow glass waveguides in urological treatment

Michal Němec, Petr Koranda, Helena Jelínková, Oto Köhler, Pavel Drlík, Mitsunobu Miyagi, Yi Wei Shi, Yuji Matsuura

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


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 130 -2). Maximum interaction pulse energy and length in Q-switched regime were 30 mJ and 70 ns, respectively (corresponding intensity 111 -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.

Original languageEnglish
Article number24
Pages (from-to)183-191
Number of pages9
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Publication statusPublished - 2005
EventOptical Fibers and Sensors for Medical Applications V - San Jose, CA, United States
Duration: 2005 Jan 222005 Jan 25


  • Er:YAG laser
  • Q-switching
  • Ureter
  • Urology application
  • Waveguide


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