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Nd Yag laser

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https://www.readbyqxmd.com/read/29243020/effect-of-1064-nm-q-switched-nd-yag-laser-on-invasiveness-and-innate-immune-response-in-keratinocytes-infected-with-candida-albicans
#1
Baroni Adone, De Filippis Anna, Oliviero Giovanni, Fusco Alessandra, Perfetto Brunella, Buommino Elisabetta, Donnarumma Giovanna
Candida albicans is an opportunistic pathogen commensal in the oral cavity, vagina, and healthy skin. Common therapeutic options for fungal infections are topical or systemic antifungal drugs. Recently, in cutaneous pathologies, lasers and light-based treatments have emerged showing few contraindications and minimal side effects. The Q-switched (Nd-YAG) laser at a wavelength of 1064 nm has been shown to be useful in dermatology, dentistry, and some other medical specialties. It is used to treat onychomycoses, warts, and wounds and in some other treatments...
December 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29234580/laser-assisted-fabrication-of-gold-nanoparticle-composed-structures-embedded-in-borosilicate-glass
#2
Nikolay Nedyalkov, Mihaela Koleva, Nadya Stankova, Rosen Nikov, Mitsuhiro Terakawa, Yasutaka Nakajima, Lyubomir Aleksandrov, Reni Iordanova
We present results on laser-assisted formation of two- and three-dimensional structures comprised of gold nanoparticles in glass. The sample material was gold-ion-doped borosilicate glass prepared by conventional melt quenching. The nanoparticle growth technique consisted of two steps - laser-induced defect formation and annealing. The first step was realized by irradiating the glass by nanosecond and femtosecond laser pulses over a wide range of fluences and number of applied pulses. The irradiation by nanosecond laser pulses (emitted by a Nd:YAG laser system) induced defect formation, expressed by brown coloration of the glass sample, only at a wavelength of 266 nm...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29234138/effect-of-high-power-laser-with-and-without-graphite-coating-on-bonding-of-resin-cement-to-lithium-disilicate-ceramic
#3
Fernanda A Feitosa, Rodrigo M de Araújo, Franklin R Tay, Lina Niu, César R Pucci
The present study evaluated the effect of different high-power-laser surface treatments on the bond strength between resin cement and disilicate ceramic. Lithium disilicate ceramic specimens with truncated cones shape were prepared and divided into 5 groups: HF (hydrofluoric acid-etching), Er:YAG laser + HF, Graphite + Er:YAG laser + HF, Nd:YAG laser + HF, and Graphite + Nd:YAG laser + HF. The treated ceramic surfaces were characterized with scanning electron microscopy and surface roughness measurement...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29231242/a-case-of-heroin-linear-track-hyperpigmentation-histopathology-and-treatment-with-q-switched-nd-yag-1064nm-laser
#4
Viktoryia Kazlouskaya, Paul M Sagerman, Gerald N Goldberg, Silvija P Gottesman
No abstract text is available yet for this article.
December 12, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/29229404/integrated-experimental-and-computational-approach-to-laser-machining-of-structural-bone
#5
Narendra B Dahotre, Soundarapandian Santhanakrishnan, Sameehan S Joshi, Riaz J K Khan, Daniel P Fick, William B Robertson, Raymond K Sheh, Charlie N Ironside
This study describes the fundamentals of laser-bone interaction during bone machining through an integrated experimental-computational approach. Two groups of laser machining parameters identified the effects of process thermodynamics and kinetics on machining attributes at micro to macro. A continuous wave Yb-fiber Nd:YAG laser (wavelength 1070 nm) with fluences in the range of 3.18 J/mm2-8.48 J/mm2 in combination of laser power (300 W-700 W) and machining speed (110 mm/s-250 mm/s) were considered for machining trials...
December 8, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29221053/ultra-high-speed-plif-imaging-for-simultaneous-visualization-of-multiple-species-in-turbulent-flames
#6
Zhenkan Wang, Panagiota Stamatoglou, Zheming Li, Marcus Aldén, Mattias Richter
In order to obtain more detailed characteristics and information in highly turbulent flames, for a better understanding of the transient behavior of eddies in such flames, a measurement technique with sufficient temporal resolution is requested. However, the probing of species distributions relevant in combustion (e.g. OH, CH2O) with ultra-high-speed laser diagnostics still remains a challenge. Nd:YAG clusters commercially available can generate only 4-8 pulses, although with high laser energy. Systems based on a diode-pumped solid-state Nd:YAG laser combined with a dye laser produce only about 100 μJ pulse energy at ultra-high repetition rates (≥50 kHz)...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29218423/early-intraocular-pressure-change-after-peripheral-iridotomy-with-ultralow-fluence-pattern-scanning-laser-and-nd-yag-laser-in-primary-angle-closure-suspect-kowloon-east%C3%A2-pattern-scanning-laser-study-report-no-3
#7
Jeffrey Chi Wang Chan, Bonnie Nga Kwan Choy, Orlando Chia Chieh Chan, Kenneth Kai Wang Li
PURPOSE: Our purpose was to assess the early intraocular pressure (IOP) changes of ultralow fluence laser iridotomy using pattern scanning laser followed by neodymium:yttrium-aluminum-gamet (Nd:YAG) laser. METHODS: This is a prospective interventional study. Thirty-three eyes of 33 adult Chinese primary angle-closure suspect subjects were recruited for prophylactic laser peripheral iridotomy. Sequential laser peripheral iridotomy was performed using pattern scanning laser followed by Nd:YAG laser...
December 7, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29216100/emission-spectroscopy-of-expanding-laser-induced-gaseous-hydrogen-nitrogen-plasma
#8
Ghaneshwar Gautam, Christian G Parigger, Christopher M Helstern, Kyle A Drake
Microplasma is generated in an ultra-high-pure H2 and N2 gas mixture with a Nd:YAG laser device that is operated at the fundamental wavelength of 1064 nm. The gas mixture ratio of H2 and N2 is 9 to 1 at a pressure of 1.21 ± 0.03 105 Pa inside a chamber. A Czerny-Turner-type spectrometer and an intensified charge-coupled device are utilized for the recording of plasma emission spectra. The line-of-sight measurements are Abel inverted to determine the radial distributions of electron number density and temperature...
November 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29202725/complete-occlusion-of-anterior-capsulorhexis-after-uneventful-cataract-surgery-treated-with-yag-laser-capsulotomy
#9
Hoon Dong Kim, Jae Min Kim, Jong Jin Jung
BACKGROUND: Capsular contraction syndrome (CCS) has been reported as an uncommon complication after an cataract extraction surgery with intact anterior capsulorhexis. This report is written to present a case of complete occlusion of the anterior capsulorhexis opening after an uneventful cataract surgery, which was treated with non-invasive treatment. CASE PRESENTATION: A 69-year-old woman complained of decreased visual acuity in her right eye, which had started 2 months ago...
December 4, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29200757/randomized-clinical-trial-to-evaluate-the-efficacy-and-safety-of-combination-therapy-with-short-pulsed-1-064-nm-neodymium-doped-yttrium-aluminium-garnet-laser-and-amorolfine-nail-lacquer-for-onychomycosis
#10
Kui Young Park, Joon Hyuk Suh, Beom Joon Kim, Myeung Nam Kim, Chang Kwun Hong
Background: Onychomycosis is one of the most prevalent fungal diseases in the general population. However, treatment is of limited effectiveness and must be administered for long periods of time. Systemic antifungal agents are associated with adverse effects. Objective: We evaluated the clinical efficacy and safety of a 1,064-nm neodymium-doped yttrium aluminium garnet (Nd:YAG) laser with amorolfine nail lacquer to treat onychomycosis. Methods: The 128 patients were randomly divided to 2 groups: 64 in the experimental group were treated with 1,064-nm Nd:YAG laser therapy and amorolfine nail lacquer; the other 64 were in a control group treated with topical amorolfine lacquer monotherapy...
December 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/29197737/mid-infrared-pulsed-laser-ultrasonic-testing-for-carbon-fiber-reinforced-plastics
#11
Masahiro Kusano, Hideki Hatano, Makoto Watanabe, Shunji Takekawa, Hisashi Yamawaki, Kanae Oguchi, Manabu Enoki
Laser ultrasonic testing (LUT) can realize contactless and instantaneous non-destructive testing, but its signal-to-noise ratio must be improved in order to measure carbon fiber reinforced plastics (CFRPs). We have developed a mid-infrared (mid-IR) laser source optimal for generating ultrasonic waves in CFRPs by using a wavelength conversion device based on an optical parametric oscillator. This paper reports a comparison of the ultrasonic generation behavior between the mid-IR laser and the Nd:YAG laser. The mid-IR laser generated a significantly larger ultrasonic amplitude in CFRP laminates than a conventional Nd:YAG laser...
November 24, 2017: Ultrasonics
https://www.readbyqxmd.com/read/29183621/capillary-malformations-treated-with-sequential-pulsed-dye-and-nd-yag-laser-therapy-a-retrospective-study
#12
J Alcántara-González, P Boixeda, M T Truchuelo-Díez, N Jiménez-Gómez, B Pérez-García, L Pérez-Carmona, P Jaén Olasolo
INTRODUCTION AND OBJECTIVE: Capillary malformations are the most common vascular malformations in childhood. The current treatment of choice is pulsed dye laser (PDL) therapy, but this frequently does not result in complete resolution. The search for alternative treatment strategies thus continues. In this study we describe our experience with the use of sequential dual-wavelength PDL and Nd:YAG laser therapy in patients with capillary malformations. MATERIAL AND METHODS: We conducted a retrospective, descriptive study of patients with capillary malformations treated with dual-wavelength PDL and Nd:YAG laser therapy between 2006 and 2011...
November 25, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/29171216/nd-yag-laser-combined-with-gold-nanorods-for-potential-application-in-port-wine-stains-an-in-vivo-study
#13
Linzhuang Xing, Bin Chen, Dong Li, Wenjuan Wu, Guoxiang Wang
Neodymium:yttrium aluminum garnet (Nd:YAG) lasers exhibit considerable potential for treating deeply buried port-wine stains. However, the application of Nd:YAG laser is limited by its weak absorption to blood. This in vivo study tested the efficacy and safety of utilizing thiol-terminated methoxypolyethylene glycol-modified gold nanorods (PEG-GNRs) to enhance the absorption of Nd:YAG laser to blood. Mouse mesentery and dorsal skinfold chamber (DSC) model were prepared to analyze the thermal responses of a single venule without anatomic structures, as well as blood vessels in the complex structure of the skin, to laser light...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29168002/lasing-and-transport-properties-of-poly-9-9-dioctyl-2-7-divinylenefluorenylene-alt-co-2-methoxy-5-2-ethylhexyloxy-1-4-phenylene-pofp-for-the-application-of-diode-pumped-organic-solid-lasers
#14
Zhenyu Tang, Kunping Guo, Yulai Gao, Saihu Pan, Changfeng Si, Tao Xu, Bin Wei
This paper demonstrates the lasing and transport properties of a green conjugated polymer, namely POFP. High photoluminescence yields and excellent electron transport of POFP film make it promising for gain media. Low threshold value of 4.0 μJ/cm(2) for amplified spontaneous emissions under a pulsed Nd:YAG laser at 355 nm was obtained, as well as a high Q-factor of 159. An inverted waveguide microcavity scheme has been developed to fabricate diode-pumped organic solid lasers (OSLs) using POFP. Gain narrowing with significant radiance increase was observed in the devices, giving evidence of the interference enhancement induced by microcavity and the lasing properties of POFP...
November 22, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29164836/power-controlled-temperature-guided-retinal-laser-therapy
#15
Alexander Baade, Claus von der Burchard, Meike Lawin, Stefan Koinzer, Benedikt Schmarbeck, Kerstin Schlott, Yoko Miura, Johann Roider, Reginald Birngruber, Ralf Brinkmann
Laser photocoagulation has been a treatment method for retinal diseases for decades. Recently, studies have demonstrated therapeutic benefits for subvisible effects. A treatment mode based on an automatic feedback algorithm to reliably generate subvisible and visible irradiations within a constant irradiation time is introduced. The method uses a site-individual adaptation of the laser power by monitoring the retinal temperature rise during the treatment using optoacoustics. This provides feedback to adjust the therapy laser power during the irradiation...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29163905/laboratory-scale-photoredox-catalysis-using-hydrated-electrons-sustainably-generated-with-a-single-green-laser
#16
Robert Naumann, Christoph Kerzig, Martin Goez
The ruthenium-tris-bipyridyl dication as catalyst combined with the ascorbate dianion as bioavailable sacrificial donor provides the first regenerative source of hydrated electrons for chemical syntheses on millimolar scales. This electron generator is operated simply by illumination with a frequency-doubled Nd:YAG laser (532 nm) running at its normal repetition rate. Much more detailed information than by product studies alone was obtained by photokinetical characterization from submicroseconds (time-resolved laser flash photolysis) up to one hour (preparative photolysis)...
November 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29162667/reperfusion-of-occluded-branch-retinal-arteries-by-transluminal-nd-yag-laser-embolysis-combined-with-intravenous-thrombolysis-of-urokinase
#17
Fang Chai, Shanshuang Du, Xiquan Zhao, Runsheng Wang
Purpose.  To report successful treatment with transluminal Nd:YAG laser embolysis (TYE) combined with urokinase thrombolysis for reperfusion of occluded branch retinal arteries with visible emboli. Methods A total of 34 eyes from 34 patients with acute, severe vision loss secondary to a branch retinal artery occlusion with visible emboli and retinal whitening were examined. Each patient was administered TYE therapy, which focused on the embolus, using an ocular contact lens; a 0.3-0.9 mJ laser pulse was delivered directly and gradually according to the reaction...
November 21, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29160001/low-level-laser-therapy-induces-increased-viability-and-proliferation-in-isolated-cancer-cells
#18
C Kara, H Selamet, C Gökmenoğlu, N Kara
OBJECTIVES: Low level laser therapy (LLLT), which stimulates natural biological processes in the application region, is frequently used in dental treatments. The aim of our study was to evaluate the effects of LLLT which could activate precancerous cells or increase existing cancerous tissue in case of clinically undetectable situations. MATERIALS AND METHODS: Saos-2 osteoblast-like osteosarcoma cells and A549 human lung carcinoma cells were used. Twenty-four hours after preparation of cell culture plates, laser irradiation was performed 1, 2 and 3 times according to the test groups using Nd:YAG laser with the power output 0...
November 20, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/29152831/laser-treatment-of-cutaneous-angiokeratomas-a-systematic-review
#19
REVIEW
Jannett Nguyen, Lance W Chapman, Dorota Z Korta, Christopher B Zachary
Angiokeratomas can present therapeutic challenges, especially in cases of extensive lesions, where traditional surgical methods carry high risks of scarring and hemorrhage. Argon, pulsed dye (PDL), neodymium-doped yttrium aluminum garnet (Nd:YAG), copper vapor, potassium titanyl phosphate, carbon dioxide, and erbium-doped yttrium aluminum garnet (Er:YAG) lasers have emerged as alternative options. To review the use and efficacy of lasers in treating angiokeratomas. A PubMed search identified randomized clinical trials, cohort studies, case series, and case reports involving laser treatment of cutaneous angiokeratomas...
November 19, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/29151615/effect-of-doping-of-kdp-crystal-with-amino-acid-l-arginine-on-the-strength-properties-and-character-of-laser-damage
#20
E F Dolzhenkova, E I Kostenyukova, O N Bezkrovnaya, I M Pritula
Studied were the strength characteristics of KDP crystals doped with l-arginine under a concentrated load and irradiation of the first harmonic YAG:Nd(3+) laser. The crystals were obtained by means of the temperature reduction method on a point seed, the content of l-arginine in the aqueous solution being 0.3, 0.4, 1.0 and 1.4 wt%. The character of the dependence of KDP microhardness versus the concentration of amino acid in the crystal was investigated. The regularities of brittle damage of the doped KDP crystal at mechanical testing and laser irradiation were shown to be similar...
November 15, 2017: Journal of Crystal Growth
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