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The bactericidal effect of continuous wave laser with strongly absorbing coating at the fiber tip

Journal of Innovative Optical Health Sciences 2018年第5期11卷 51-58页

作者： Vadim Elagin Anton Smirnov Vladimir Yusupov Alexey Kirillov Nadezhda Ignatova Olga Streltsova Evgeniy Grebenkin Vladislav Kamensky Institute of Biomedical Technologies Privolzhsky Research Medical University 10/1 Minina Square Nizhny Novgorod 603005Russia Laboratory of Laser Nanomodification of Materials Institute of Applied Physics Russian Academy of Sciences 46 Ulyanova Street Nizhny Novgorod 603950Russia Institute of Photon Technologies of Federal Scientific Research Centre"Crystallography and Photonics"of the Russian Academy of Sciences 2 Pionerskaya Street MoscowTroitsk 108840Russia Department of Innovative Program Institute of Applied Physics Russian Academy of Sciences 46 Ulyanova Street Nizhny Novgorod 603950Russia

The bactericidal effect of laser radiation with a quartz fiber-based transmission system with a strong absorption coating converter against bacteria associated with urological stones has been *** am-negative rod Escherichia coli and the Gram-positive coccus Staphylococcus epi-dermidis,Staphylococcus aureus,Enterococcus faecalis and Enterococcus faecium were used in this *** bacterial species was treated by continuous-wave near infrared laser coupled with bare fiber tip or strongly absorption coating fiber *** treatment,the temperature of bacterial suspension was *** addition,the temperature dist ribution was *** has been shown that using laser with a strongly absorption coating fiber tip results in significant bactericidal *** decrease of the amount of *** and *** was 100%after treatment with an output power of6 W of radiation at a wavelength of 0.97 pum for *** of *** and *** colony-forming unit was reduced to 70%after same *** peak temperature of bacterial suspension was 86℃ after treatment by laser with a strongly absorption coating fiber *** with a strongly absorpt ion coating fiber tip provides large scale hydrodynamic flows directed away from the fiber *** laser with a strongly absorption coating fiber tip has bactericidal *** main role is associated with the effect of high temperature,which,in the form of flow in a liquid medium,afects bacteria.

关键词： Laser strongly absorbing coating bacteria bacterididal efect laserinduced hydrodynamic

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The influence on biotissue laser resection of a strongly absorbing layer at the optical fiber tip

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Journal of Innovative Optical Health Sciences 2016年第5期9卷 15-21页

作者： Daria Kuznetsova Vadim Elagin Maria Karabut Maria Shakhova Vladimir Bredikhin Liudmila Snopova Andrei Shakhov Natalia Sapogova Nikita Bityurin Victor Bagratashvili Vladislav Kamensky Institute of Biomedical Technologies Nizhny Novgorod State Medical Academy 10/1 Minin and Pozharsky Sq. Nizhny Novgorod 603005Russia Lobachevsky State University of Nizhni Novgorod 23 Gagarin Avenue BLDG 2 Nizhny Novgorod 603950Russia Nizhny Novgorod State Medical Academy 10/1 Minin and Pozharsky Sq. Nizhny Novgorod 603005Russia Institute of Applied Physics Russian Academy of Sciences 46 Ul'yanov StreetNizhny Novgorod 603950Russia Institute on Laser and Information Technologies Russian Academy of Sciences 2 Pionerskaya St. Troitsk 142092Russia

In this paper,we consider a method of laser resection using the silica glass core from which the cladding layer has been removed as the cutting part of a laser *** absorbing layer coating the silica fiber tip markedly alters its biotissue cutting character *** results of histological studies of skin after exposure to a laser scalpel with and without a strongly absorbing coating(SAC)at a wavelength of 097μm show that resection using a coated scalpel is more *** an uncoated scalpel was used,skin injury was more apparent in both its surface spread and the depth of structural damage,resulting in poorer tissue regeneration.

关键词： Laser surgery silica fibers strongly absorbing coating histology

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