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Proceedings Paper

Lasers for lithotripsy
Author(s): Petr Koranda; Michal Nemec; Helena Jelinková; Jan Pokorny; Oto Kőhler; Pavel Drlík; Mitsunobu Miyagi; Katsumasa Iwai; Yi-Wei Shi; Yuji Matsuura
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Paper Abstract

Laser-assisted lithotripsy is a minimally-invasive method for destroying or disruption of human urinary stones. For this purpose laser light delivered through the flexible sealed waveguide or fibre could be utilized. On the output end of the delivery system the laser ligth is focused onto the surface of urinary stones with various size and various composition. In clinical urological practise the Ho:YAG laser with the generated wavelength 2100 nm operated in free-running regime is commonly used. The aim of our investigation was to compare the damage effects of Ho:YAG laser radiation with the promissing Er:YAG laser radiation. The Er:YAG laser generates radiation with the wavelength 2940 nm, which coincides with the local absorption maximum of water. We have compared the laser effect with the help of uniformly produced model samples made from special plaster. The size of the samples was 10×10×10 mm. The perforation and disruption effectiveness of Ho:YAG and Er:YAG laser radiations were performed and compared. In the final step the laser lithotripsy of human urinary stones was tested with Er:YAG laser radiation delivered through the special COP/Ag hollow waveguides sealed with fused silica cap.

Paper Details

Date Published: 18 November 2008
PDF: 6 pages
Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71380L (18 November 2008); doi: 10.1117/12.817985
Show Author Affiliations
Petr Koranda, Czech Technical Univ. in Prague (Czech Republic)
Michal Nemec, Czech Technical Univ. in Prague (Czech Republic)
Helena Jelinková, Czech Technical Univ. in Prague (Czech Republic)
Jan Pokorny, Central Military Hospital (Czech Republic)
Oto Kőhler, Central Military Hospital (Czech Republic)
Pavel Drlík, Central Military Hospital (Czech Republic)
Mitsunobu Miyagi, Sendai National College of Technology (Japan)
Katsumasa Iwai, Sendai National College of Technology (Japan)
Yi-Wei Shi, Fudan Univ. (China)
Yuji Matsuura, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 7138:
Photonics, Devices, and Systems IV
Pavel Tománek; Dagmar Senderáková; Miroslav Hrabovský, Editor(s)

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