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https://www.readbyqxmd.com/read/28821986/comparative-analysis-of-the-effects-of-co2-fractional-laser-and-sonophoresis-on-human-skin-penetration-with-5-aminolevulinic-acid
#1
J H Choi, E J Shin, K H Jeong, M K Shin
Successful delivery of a photosensitizer into the skin is an important factor for effective photodynamic therapy (PDT). The effective method to increase drug penetration within short incubation time overcoming skin barrier have been investigated. This study was performed to analyze and compare the effectiveness of ablative fractional laser (FXL) pretreatment and/or sonophoresis for enhancing the penetration of 5-aminolevulinic acid (ALA) into human skin in vivo. Twenty-four identical 1 × 1 cm(2) treatment areas were mapped on the backs of ten healthy male subjects...
August 19, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28819810/laser-assisted-surgery-of-the-upper-aero-digestive-tract-a-clarification-of-nomenclature-a-consensus-statement-of-the-european-laryngological-society
#2
Marc Remacle, Christoph Arens, Mostafa Badr Eldin, Guillermo Campos, Carlos Chiesa Estomba, Pavel Dulguerov, Ivana Fiz, Anastasios Hantzakos, Jerôme Keghian, Francesco Mora, Nayla Matar, Giorgio Peretti, Cesare Piazza, Gregory N Postma, Vyas Prasad, Elisabeth Sjogren, Frederik G Dikkers
Acronyms and abbreviations are frequently used in otorhinolaryngology and other medical specialties. CO2 laser-assisted transoral surgery of the pharynx, the larynx and the upper airway is a family of commonly performed surgical procedures termed transoral laser microsurgery (TLM). The abbreviation TLM can be confusing because of alternative modes of delivery. Classification and definition of the different types of procedures, performed transorally or transnasally, are proposed by the Working Committee for Nomenclature of the European Laryngological Society, emphasizing the type of laser used and the way this laser is transmitted...
August 17, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28812169/bond-strength-of-etch-and-rinse-and-self-etch-adhesive-systems-to-enamel-and-dentin-irradiated-with-a-novel-co2-9-3%C3%A2-%C3%AE-m-short-pulsed-laser-for-dental-restorative-procedures
#3
Peter Rechmann, N Bartolome, R Kinsel, R Vaderhobli, B M T Rechmann
The objective of this study was to evaluate the influence of CO2 9.3 μm short-pulsed laser irradiation on the shear bond strength of composite resin to enamel and dentin. Two hundred enamel and 210 dentin samples were irradiated with a 9.3 µm carbon dioxide laser (Solea, Convergent Dental, Inc., Natick, MA) with energies which either enhanced caries resistance or were effective for ablation. OptiBond Solo Plus [OptiBondTE] (Kerr Corporation, Orange, CA) and Peak Universal Bond light-cured adhesive [PeakTE] (Ultradent Products, South Jordan, UT) were used...
August 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28812164/efficacy-of-fractional-lasers-in-treating-alopecia-a-literature-review
#4
Marina Perper, Adam S Aldahan, Rachel A Fayne, Christopher P Emerson, Keyvan Nouri
Hair loss stemming from different types of alopecia, such as androgenic alopecia and alopecia areata, negatively affects over half the population and, in many circumstances, causes serious psychosocial distress. Current treatment options for alopecia, such as minoxidil, anthralin, and intralesional corticosteroids, vary efficacy and side effect profiles. It is known that low-level laser/light therapies (LLLT), or photobiomodulations, such as the US FDA-cleared HairMax Lasercomb®, He-Ne laser, and excimer laser, are relatively affordable, user-friendly, safe, and effective forms of treatment for hair loss...
August 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28809872/surface-nanoscale-axial-photonics-at-a-capillary-fiber
#5
T Hamidfar, A Dmitriev, B Magdan, P Bianucci, M Sumetsky
We present the theory and first experimental demonstration, to the best of our knowledge, of a sensing platform based on surface nanoscale axial photonics (SNAP) at a capillary fiber. The platform explores optical whispering gallery modes, which circulate inside the wall of a capillary and slowly propagate along its axis. Due to the small thickness of the capillary wall, these modes are sensitive to spatial and temporal variations of the refractive index of the media adjacent to the internal capillary surface...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28809823/non-equilibrium-microwave-plasma-for-efficient-high-temperature-chemistry
#6
Dirk van den Bekerom, Niek den Harder, Teofil Minea, Nicola Gatti, Jose Palomares Linares, Waldo Bongers, Richard van de Sanden, Gerard van Rooij
A flowing microwave plasma based methodology for converting electric energy into internal and/or translational modes of stable molecules with the purpose of efficiently driving non-equilibrium chemistry is discussed. The advantage of a flowing plasma reactor is that continuous chemical processes can be driven with the flexibility of startup times in the seconds timescale. The plasma approach is generically suitable for conversion/activation of stable molecules such as CO2, N2 and CH4. Here the reduction of CO2 to CO is used as a model system: the complementary diagnostics illustrate how a baseline thermodynamic equilibrium conversion can be exceeded by the intrinsic non-equilibrium from high vibrational excitation...
August 1, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28809365/type-of-surgical-treatment-and-recurrence-of-oral-leukoplakia-a-retrospective-clinical-study
#7
L Monteiro, C Barbieri, S Warnakulasuriya, M Martins, F Salazar, J-J Pacheco, P Vescovi, M Meleti
BACKGROUND: Oral leukoplakia (OL) is the most typical potentially malignant disorder of the oral mucosa. We aimed to evaluate the clinical outcome of oral leukoplakia treated with several types of lasers and with the use of quantic molecular resonance (QMR) lancet, in terms of recurrence rate. MATERIAL AND METHODS: Eighty-seven previously untreated OL (52 occurring in females and 35 in males, mean age of 59.4 ± 13.9 years) were consecutively submitted to surgical treatment at University Hospital of Parma, Italy, and Hospital de Valongo, Portugal, (1999 to 2012)...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28797166/patternable-solvent-processed-thermoplastic-graphite-electrodes
#8
Kevin Klunder, Zach Nilsson, Justin Sambur, Charles S Henry
Since their invention in the 1950's, composite carbon electrodes have been employed in a wide variety of applications, ranging from batteries and fuel cells to chemical sensors because they are easy to make and pattern at millimeter scales. Despite their widespread use, traditional carbon composite electrodes have substandard electrochemistry relative to metallic and glassy carbon electrodes. As a result, there is a critical need for new composite carbon electrodes that are highly electrochemically active, have universal and easy fabrication into complex geometries, are highly conductive, and are low cost...
August 10, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28771311/lightweight-hexagonal-boron-nitride-foam-for-co2-absorption
#9
Peter Samora Owuor, Ok-Kyung Park, Cristiano F Woellner, Almaz S Jalilov, Sandhya Susarla, Jarin Joyner, Sehmus Ozden, LuongXuan Duy, Rodrigo Villegas Salvatierra, Robert Vajtai, James M Tour, Jun Lou, Douglas Soares Galvão, Chandra Sekhar Tiwary, Pulickel M Ajayan
Weak van der Waals forces between inert hexagonal boron nitride (h-BN) nanosheets make it easy for them to slide over each other, resulting in an unstable structure in macroscopic dimensions. Creating interconnections between these inert nanosheets can remarkably enhance their mechanical properties. However, controlled design of such interconnections remains a fundamental problem for many applications of h-BN foams. In this work, a scalable in situ freeze-drying synthesis of low-density, lightweight 3D macroscopic structures made of h-BN nanosheets chemically connected by poly(vinyl alcohol) (PVA) molecules via chemical cross-link is demonstrated...
August 11, 2017: ACS Nano
https://www.readbyqxmd.com/read/28770400/microablative-fractional-co2-laser-for-the-genitourinary-syndrome-of-menopause-power-of-30-or-40%C3%A2-w
#10
Eleni Pitsouni, Themos Grigoriadis, Matthew Falagas, Angeliki Tsiveleka, Stefano Salvatore, Stavros Athanasiou
This retrospective case-control study aimed to compare 30 versus 40 W power of CO2 laser for the therapy of genitourinary syndrome of menopause (GSM). Postmenopausal women with severe intensity of dyspareunia and dryness were eligible to be included in this study. Primary outcomes were dyspareunia and dryness. Secondary outcomes were itching/burning, dysuria, frequency and urgency, Female Sexual Function Index (FSFI), vaginal maturation value (VMV), and Vaginal Health Index Score (VHIS). One laser therapy was applied every month for 3 months...
August 2, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28766977/surgical-management-of-supraglottic-stenosis-using-intubationless-optiflow
#11
Kenric Tam, Caroline Jeffery, C Kwang Sung
OBJECTIVE: Airway management during endoscopic surgical treatment of supraglottic and pharyngeal stenosis is often challenging and can be accomplished by various means, including tracheostomy, jet ventilation, or direct laryngoscopy. We describe CO2 laser excision of supraglottic-pharyngeal stenosis using intubationless Optiflow high-flow nasal cannula (HFNC). METHODS: A 55-year-old male presented with dyspnea and dysphagia secondary to severe supraglottic-pharyngeal stenosis in the setting of previous chemoradiation for a T0N2aM0 squamous cell carcinoma...
September 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28765670/microleakage-in-class-v-composite-restorations-after-desensitizing-surface-treatment-with-er-yag-and-co2-lasers
#12
Hamid Reza Mozaffari, Alireza Ehteshami, Farshad Zallaghi, Nasim Chiniforush, Zohreh Moradi
Aims: Glutaraldehyde, CO2 and Er:YAG lasers can be used for treatment of dentin hypersensitivity. However, their application may have adverse effects on the clinical service of restorations. This study aimed to assess the microleakage in composite restorations following surface treatment with Glutaraldehyde desensitizer, CO2 and Er:YAG laser irradiation for treatment of dentin hypersensitivity. Materials and methods: This experimental study was conducted on 60 extracted sound human teeth. Class V cavities were prepared measuring 3×3 mm using a diamond bur...
December 30, 2016: Laser Therapy
https://www.readbyqxmd.com/read/28763401/randomized-double-blind-placebo-controlled-clinical-trial-for-evaluating-the-efficacy-of-fractional-co2-laser-compared-with-topical-estriol-in-the-treatment-of-vaginal-atrophy-in-postmenopausal-women
#13
Vera L Cruz, Marcelo L Steiner, Luciano M Pompei, Rodolfo Strufaldi, Fernando L Afonso Fonseca, Lucila H Simardi Santiago, Tali Wajsfeld, Cesar E Fernandes
OBJECTIVE: The aim of the study was to evaluate efficacy of fractional CO2 vaginal laser treatment (Laser, L) and compare it to local estrogen therapy (Estriol, E) and the combination of both treatments (Laser + Estriol, LE) in the treatment of vulvovaginal atrophy (VVA). METHODS: A total of 45 postmenopausal women meeting inclusion criteria were randomized in L, E, or LE groups. Assessments at baseline, 8 and 20 weeks, were conducted using Vaginal Health Index (VHI), Visual Analog Scale for VVA symptoms (dyspareunia, dryness, and burning), Female Sexual Function Index, and maturation value (MV) of Meisels...
July 31, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28759996/real-time-elucidation-of-catalytic-pathways-in-co-hydrogenation-on-ru
#14
J LaRue, O Krejčí, L Yu, M Beye, M L Ng, H Öberg, H Xin, G Mercurio, S Moeller, J J Turner, D Nordlund, R Coffee, M P Minitti, W Wurth, L G M Pettersson, H Öström, A Nilsson, F Abild-Pedersen, H Ogasawara
The direct elucidation of the reaction pathways in heterogeneous catalysis has been challenging due to the short-lived nature of reaction intermediates. Here, we directly measured on ultrafast time scales the initial hydrogenation steps of adsorbed CO on a Ru catalyst surface, which is known as the bottleneck reaction in syngas and CO2 reforming processes. We initiated the hydrogenation of CO with an ultrafast laser temperature jump and probed transient changes in the electronic structure using real-time X-ray spectroscopy...
August 3, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28759461/lasers-for-pelvic-floor-dysfunctions-is-there-evidence
#15
Patrick Lang, Mickey Karram
PURPOSE OF REVIEW: The purpose of this review is to discuss the available energy sources used in the vaginal canal that are currently being promoted for certain pelvic floor conditions and explore the body of peer-reviewed literature supporting their use. RECENT FINDINGS: The majority of research has focused on the use of fractional CO2 laser treatment for genitourinary syndrome of menopause (GSM). Most of these studies are nonrandomized prospective studies, but their data consistently shows an improvement in symptoms without significant side effects...
July 29, 2017: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28759110/effects-of-early-combinatorial-treatment-of-autologous-split-thickness-skin-grafts-in-red-duroc-pig-model-using-pulsed-dye-laser-and-fractional-co2-laser
#16
J Kevin Bailey, Britani N Blackstone, Danielle M DeBruler, Jayne Y Kim, Molly E Baumann, Kevin L McFarland, Folasade O Imeokparia, Dorothy M Supp, Heather M Powell
BACKGROUND AND OBJECTIVE: The use of pulsed dye laser (PDL) and fractional CO2 (FX CO2 ) laser therapy to treat and/or prevent scarring following burn injury is becoming more widespread with a number of studies reporting reduction in scar erythema and pruritus following treatment with lasers. While the majority of studies report positive outcomes following PDL or FX CO2 therapy, a number of studies have reported no benefit or worsening of the scar following treatment. The objective of this study was to directly compare the efficacy of PDL, FX CO2 , and PDL + FX CO2 laser therapy in reducing scarring post burn injury and autografting in a standardized animal model...
July 31, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28756690/continuous-measurements-of-stable-isotopes-of-carbon-dioxide-and-water-vapour-in-an-urban-atmosphere-isotopic-variations-associated-with-meteorological-conditions
#17
Ryuichi Wada, Yutaka Matsumi, Tomoki Nakayama, Tetsuya Hiyama, Yasushi Fujiyoshi, Naoyuki Kurita, Kenichiro Muramoto, Satoru Takanashi, Naomi Kodama, Yoshiyuki Takahashi
Isotope ratios of carbon dioxide and water vapour in the near-surface air were continuously measured for one month in an urban area of the city of Nagoya in central Japan in September 2010 using laser spectroscopic techniques. During the passages of a typhoon and a stationary front in the observation period, remarkable changes in the isotope ratios of CO2 and water vapour were observed. The isotope ratios of both CO2 and water vapour decreased during the typhoon passage. The decreases can be attributed to the air coming from an industrial area and the rainout effects of the typhoon, respectively...
July 30, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28755008/biochar-influences-on-soil-co2-and-ch4-fluxes-in-response-to-wetting-and-drying-cycles-for-a-forest-soil
#18
Mark S Johnson, Cameron Webster, Rachhpal S Jassal, Iain Hawthorne, T Andrew Black
Biochar has been the focus of significant research efforts in agriculture, but little research has been conducted in forested ecosystems. Here, we assess CO2 and CH4 fluxes from a forest soil in response to biochar additions using a before-after-control-intervention experimental design. Soil CO2 and CH4 fluxes were measured over a series of wetting cycles by coupling soil mesocosms equipped with auto-chambers to a laser-based spectrometer for high-frequency measurements of gas fluxes and related soil processes...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28753271/efficient-water-splitting-electrodes-based-on-laser-induced-graphene
#19
Jibo Zhang, Chenhao Zhang, Junwei Sha, Huilong Fei, Yilun Li, James M Tour
Electrically splitting water to H2 and O2 is a preferred method for energy storage as long as no CO2 is emitted during the supplied electrical input. Here we report a laser-induced graphene (LIG) process to fabricate efficient catalytic electrodes on opposing faces of a plastic sheet, for the generation of both H2 and O2. The high porosity and electrical conductivity of LIG facilitates the efficient contact and charge transfer with the requisite electrolyte. The LIG-based electrodes exhibit high performance for hydrogen evolution reaction and oxygen evolution reaction with excellent long-term stability...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28753078/which-is-more-effective-for-pain-relief-during-fractionated-carbon-dioxide-laser-treatment-emla-cream-or-forced-cold-air-anesthesia
#20
Elif Sari, Bulent Bakar
BACKGROUND AND AIM: The aim of this study was to compare the effectiveness of a eutectic mixture of local anesthetic (EMLA) cream and forced cold air anesthesia (FCAA) on pain control during ablative fractionated carbon dioxide (CO2) laser treatment. METHODS: Fifteen volunteers participated in this prospective, controlled, split-face clinical study. EMLA cream was applied 60 minutes before the laser procedure on half of the face, and FCAA was performed on each subunit of the other half of the face...
July 28, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
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