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Nd Yag laser

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https://www.readbyqxmd.com/read/28208899/study-of-variation-in-intraocular-pressure-spike-iop-following-nd-yag-laser-capsulotomy
#1
Niharika K Shetty, Sriya Sridhar
INTRODUCTION: Posterior Capsular Opacifications (PCO) is a frequent complication of cataract surgery following posterior chamber intraocular lens implantation. Nd -Yag laser capsulotomy is the treatment of choice for PCO and is known to be associated with complications like Raised Intraocular Pressure (IOP), Intraocular lens pitting, intraocular lens cracks, cystoid macular oedema, retinal detachment, corneal burns. Raised IOP is the most common complication and prescribing anti-glaucoma drugs post capsulotomy is a common practise...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28203003/-bleeding-control-of-periodontal-mechanical-therapy-for-patients-taking-aspirin
#2
F Ding, Y L Lyu, W Xuan, D Y Liu, X Q Duan, X Han
OBJECTIVE: To investigate the feasibility of periodontal mechanical therapy for chronic periodontitis and coronary heart disease patients with low dose of aspirin. METHODS: Sixty nine chronic periodontitis patients with coronary heart disease were randomly selected as the experimental group (medication group, group A), the control group (withdrawal group, group B) including 20 chronic periodontitis patients with coronary artery disease, stopping the drug for one week and another control group with 50 chronic periodontitis patients (group C)...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28198864/shot-noise-limited-laser-power-stabilization-for-the-aei-10%C3%A2-%C3%A2-m-prototype-interferometer
#3
Jonas Junker, Patrick Oppermann, Benno Willke
The AEI 10 m Prototype interferometer is an experiment to investigate the standard quantum limit of interferometry and, in particular, its relevance in gravitational-wave detection. As such it has stringent requirements on the power stability of its high-power light source. In this Letter we present the power stabilization concept of the 35 W Nd:YAG laser system used in the AEI 10 m Prototype. With a shot-noise-limited multiphotodetector sensing scheme we achieved a relative power noise level of 1.8×10<sup>-9</sup>  Hz<sup>-1/2</sup> in a frequency band of 100 Hz to 1 kHz...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28198860/approach-for-power-scaling-solid-state-lasers-with-intracavity-motion
#4
Matthew Eckold, Jacob I Mackenzie, W Andrew Clarkson
Solid-state lasers are typically limited by adverse thermal effects within the gain medium. In this Letter we describe a new method for dramatically reducing thermal effects in an end-pumped solid-state laser by incorporating a rotating intracavity periscope in the resonator to spatially separate the lasing and thermal processes. In contrast with previous examples of moving solid-state lasers, our approach keeps the gain medium stationary, simplifying the heat removal arrangement. This scheme has been applied to an Nd:YAG laser, yielding an output power of 120 W at 1...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28197412/bronchoscopic-diagnosis-and-treatment-of-primary-tracheobronchial-amyloidosis-a-retrospective-analysis-from-china
#5
Xiaoxiao Lu, Bixiu He, Ge Wang, Baimei He, Lijing Wang, Qiong Chen
Objective. To assess the value of bronchoscopy in the diagnosis and treatment of primary tracheobronchial amyloidosis (TBA), in order to reduce misdiagnosis rates and improve prognosis. Methods. Clinical data of 107 patients with TBA reported from 1981 to 2015 in China were retrospectively analyzed for clinical features, bronchoscopic manifestations, pathologies, treatments, and outcomes. Results. 105 of 107 TBA patients were pathologically confirmed by bronchoscopy. Main bronchoscopic manifestations of TBA were single or multiple nodules and masses within tracheobronchial lumens; local or diffuse luminal stenosis and obstruction; luminal wall thickening and rigidity; rough or uneven inner luminal walls; congestion and edema of mucosa, which was friable and prone to bleeding upon touch; and so forth...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28196161/effectiveness-of-nd-yag-laser-fiberotomy-in-clinical-crown-lengthening-by-forced-eruption
#6
Masoumeh Faramarzi, Sahand Rikhtegaran, Sogol H Biroon
Crown lengthening by forced eruption is usually followed by conventional surgical procedures. The aim of the present study was to evaluate clinical use of Nd:YAG laser fiberotomy in crown lengthening by forced eruption as an alternative to surgery. Patients who needed crown lengthening were enrolled in this prospective case series and underwent forced eruption. Fiberotomy by Nd:YAG laser was performed 2 days after initiation of forced eruption and every 2 weeks afterward to reach optimum clinical crown length...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28181723/nanosecond-laser-assisted-nitrogen-doping-of-graphene-oxide-dispersions
#7
Dejan Kepić, Stefania Sandoval, Ángel Pérez Del Pino, Enikö György, Laura Cabana, Belén Ballesteros, Gerard Tobias
N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (VIS) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination...
February 9, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28164458/comparison-of-hair-removal-efficacy-and-side-effect-of-neodymium-yttrium-aluminum-garnet-laser-and-intense-pulsed-light-systems-18-month-follow-up
#8
Georgina Zita Szima, Eszter Anna Janka, Anikó Kovács, Blanka Bortély, Edina Bodnár, Irina Sawhney, Éva Szabó, Éva Remenyik
BACKGROUND: Photothermal destruction of hair shaft melanin with intense pulsed light (IPL) and neodymium:yttrium-aluminum-garnet (Nd:YAG) laser has become an effective treatment of hair removal. AIMS: Our aim was to compare efficacy, satisfactory levels, safety, and side effects of Nd:YAG and IPL in hair reduction. METHODS: This was a prospective randomized intrapatient, right-left, assessor-blinded comparison of Nd:YAG vs IPL. There were 38 volunteers recruited...
February 6, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28160203/nd-yag-laser-induced-morphology-change-and-photothermal-conversion-of-gold-nanorods-with-potential-application-in-the-treatment-of-port-wine-stain
#9
Linzhuang Xing, Bin Chen, Dong Li, Jun Ma, Wenjuan Wu, Guoxiang Wang
Based on the principle of selective photothermolysis, 1064 nm Nd:YAG laser has great potential for the treatment of deeper and larger PWS. However, the clinical effectiveness is limited because of the weak absorption of blood to Nd:YAG laser. The aim of this study is to obtain the optimal irradiation conditions to effectively destroy vascular lesions with the assistance of PEG-modified gold NRs to enhance blood absorption of Nd:YAG laser. In our study, PEG-modified gold NRs were prepared by the seeded growth method...
February 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28158098/simultaneous-dual-wavelength-q-switched-nd-yag-laser-at-1052-and-1073%C3%A2-%C3%A2-nm
#10
Haifeng Lin, Wenzhang Zhu, Feibing Xiong, Jianjian Ruan
We report a continuous-wave dual-wavelength Nd:YAG laser at 1052 and 1073 nm, for the first time to the best of our knowledge, in free-running mode. The maximum output power reaches 6.64 W with slope efficiency of about 42.1% with respect to the absorbed power. Inserting a Cr:YAG saturable absorber, the dual-wavelength laser can operate in the Q-switching regime with maximum average output power of 880 mW. The minimum pulse width and the highest pulse repetition rate are 28 ns and 17.12 kHz, respectively. The dual-wavelength laser has potential to generate a 5...
February 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28158032/composite-nd-yag-sic-bonding-laser-with-orthogonal-linear-polarization-output
#11
Yan Zhou, Jianqiu Xu, Yulong Tang
We report a multiple-gain-element Nd:YAG laser where the gain media (three pieces of slab crystal) are alternately bonded to two optical quality 4H-SiC wafers. Such composite gain configuration can efficiently remove waste heat from the gain medium, preventing thermal lensing and heat-induced birefringence/distortion under high power laser operation. Through near Brewster's angles incidence designing and polarization discrimination, two orthogonally linearly polarized (P and S polarized) laser beams are generated simultaneously from different parts of the same system...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28157876/indirect-ignition-of-energetic-materials-with-laser-driven-flyer-plates
#12
Steven W Dean, Frank C De Lucia, Jennifer L Gottfried
The impact of laser-driven flyer plates on energetic materials CL-20, PETN, and TATB has been investigated. Flyer plates composed of 25 μm thick Al were impacted into the energetic materials at velocities up to 1.3 km/s. The flyer plates were accelerated by means of an Nd:YAG laser pulse. The laser pulse generates rapidly expanding plasma between the flyer plate foil and the substrate to which it is adhered. As the plasma grows, a section of the metal foil is ejected at high speed, forming the flyer plate...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28157730/successful-treatment-of-classic-kaposi-sarcoma-with-long-pulse-neodymium-doped-yttrium-aluminum-garnet-nd-yag-laser-a-preliminary-study
#13
Mustafa Özdemir, Ali Balevi
BACKGROUND: Kaposi sarcoma (KS) is a systemic disease that can present with cutaneous lesions with or without internal involvement, mostly caused by infection with human herpesvirus-8. The treatment options include surgical excision, cryotherapy, radiotherapy, intralesional chemotherapy, laser, and elastic stockings for the prevention of lymphedema. OBJECTIVE: This article presents 7 cases with classic KS treated with the long-pulse neodymium:yttrium-aluminum-garnet (Nd:YAG) laser...
February 1, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28157423/effect-of-nd-yag-and-co2-laser-irradiation-on-prevention-of-enamel-demineralization-in-orthodontics-in-vitro-study
#14
Renato Siva Paulos, Priscila Yumi Seino, Karen Akemi Fukushima, Marcia Martins Marques, Fernanda Campos Sousa de Almeida, Karen Muller Ramalho, Patricia Moreira de Freitas, Aldo Brugnera, Maria Stella Moreira
OBJECTIVE: The aim of this study was to investigate Nd:YAG and CO2 laser effects in the prevention of demineralization in deeper layers of enamel via successive acid challenge cycles. BACKGROUND DATA: Lasers are promising in the prevention of enamel demineralization around the orthodontic brackets; however, there are very few studies that evaluate if the effects of treatment could be extended after successive acid challenge cycles due to permanent enamel structural alterations...
January 18, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28147710/preparation-of-iron-oxide-nanoparticles-decorated-carbon-nanotube-using-laser-ablation-in-liquid-and-their-antimicrobial-activity
#15
Khawla S Khashan, Ghassan M Sulaiman, Rafal Mahdi
The antimicrobial activity was investigated for iron oxide IO nanoparticles (NPs)-decorated carbon nanotubes CNT prepared successfully by Nd:YAG-pulsed laser ablation in the liquid process. TEM reveals the composite NP and exhibits semispherical of iron oxide NPs, which aggregate around rolled and unrolled graphene sheet. XRD pattern proved the presence of carbon and different phases of IO NPs. Then, the antibacterial activity of the NPs was examined against different bacteria using nutrient broth and nutrient agar methods, which was enhanced using IO...
February 1, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28146539/laser-crater-enhanced-raman-spectroscopy
#16
Vasily N Lednev, Pavel A Sdvizhenskii, Mikhail Ya Grishin, Mikhail N Filippov, Alexander N Shchegolikhin, Sergey M Pershin
Raman signal enhancement by multiple scattering inside laser crater cones was observed for the first time, to the best of our knowledge. Laser crater enhanced Raman spectroscopy (LCERS) yielded a 14-fold increase in the Raman spectra bands due to efficient multiple scattering of laser irradiation within the laser crater walls. The same pulsed Nd:YAG laser (532 nm, 10 ns) was used for both laser crater formation and Raman scattering experiments by varying the output pulse energy. First, powerful pulses are used to produce the laser crater; then low-energy pulses are used to perform Raman scattering measurements...
February 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28145693/laser-initiation-of-fe-ii-complexes-of-4-nitro-pyrazolyl-substituted-tetrazine-ligands
#17
Thomas W Myers, Kathryn E Brown, David E Chavez, R Jason Scharff, Jacqueline M Veauthier
The synthesis and characterization of new 1,2,4-triazolyl and 4-nitro-pyrazolyl substituted tetrazine ligands has been achieved. The strongly electron deficient 1,2,4-triazolyl substituted ligands did not coordinate Fe(II) metal centers, while the mildly electron deficient 4-nitro-pyrazolyl substituted ligands did coordinate Fe(II) metal centers in a 2:1 ratio of ligand to metal. The thermal stability and mechanical sensitivity characteristics of the complexes are similar to the conventional explosive pentaerythritol tetranitrate...
February 1, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28135887/median-canaliform-nail-dystrophy-treated-with-a-1064-nm-q-switched-nd-yag-laser
#18
Ju-Yeon Choi, Hyun-Min Seo, Won-Serk Kim
Median canaliform nail dystrophy is an uncommon and idiopathic dystrophic change, typically appears as central, longitudinal groove or split involving one or both thumbnails. Various treatments including potent topical steroid, an intralesional injection of triamcinolone 2.5 to 3 mg/dL, medications for systemic treatment, and topical psoralen plus ultraviolet A (PUVA) have been tried to treat the disease. However, each treatment has limitations including severe pain, inconsistent treatment results, long treatment periods, and dissatisfaction with effects of treatment...
January 31, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28135574/effect-of-nd-yag-laser-assisted-non-surgical-mechanical-debridement-on-clinical-and-radiographic-peri-implant-inflammatory-parameters-in-patients-with-peri-implant-disease
#19
Tariq Abduljabbar, Fawad Javed, Sergio Varela Kellesarian, Fahim Vohra, Georgios E Romanos
BACKGROUND AND AIM: The efficacy of neodymium-doped yttrium aluminium garnet (Nd:YAG) laser-assisted non-surgical mechanical debridement (MD) in the treatment of periimplant diseases remains uninvestigated. The aim was to assess the efficacy of Nd:YAG laser-assisted non-surgical MD on clinical and radiographic periimplant inflammatory parameters in patients with periimplant disease. METHODS: Treatment wise, 63 male patients with periimplant diseases were divided into 2 groups: Group-1 (32 patients): treatment of periimplant disease using MD alone (control group); and Group-2 (n=31 patients): treatment of periimplant disease using MD with a single application of Nd:YAG laser...
January 21, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28123486/comparison-of-the-efficacy-of-four-endobronchial-ablation-techniques-in-dogs
#20
Linrong Tong, Koudong Zhang, Haidong Huang, Wei Zhang, Xingxing Zhang, Qin Wang, Qiang Li, Chong Bai
The present study aimed to evaluate the safety and efficacy of four commonly used ablation techniques, namely neodymium-doped yttrium aluminium garnet (Nd:YAG) laser therapy, argon plasma coagulation (APC), high-frequency electrocautery and CO2 cryotherapy. The techniques were performed at various powers or impedance settings, and for various durations, on the trachea of beagle dogs. Pathological changes of the tracheal wall were assessed by bronchoscopy. The endoscopic gross appearance of lesions induced by ablation treatments was consistent with the histopathological changes...
January 2017: Experimental and Therapeutic Medicine
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