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https://www.readbyqxmd.com/read/27919430/carbon-dioxide-insufflation-deflects-airborne-particles-from-an-open-surgical-wound-model
#1
P Kokhanenko, G Papotti, J E Cater, A C Lynch, J A van der Linden, C J T Spence
BACKGROUND: Surgical site infections remain a significant burden on healthcare systems and may benefit from new countermeasures. AIM: To assess the merits of open surgical wound CO2 insufflation via a gas diffuser to reduce airborne contamination, and to determine the distribution of CO2 in and over a wound. METHODS: An experimental approach with engineers and clinical researchers was employed to measure the gas flow pattern and motion of airborne particles in a model of an open surgical wound in a simulated theatre setting...
November 21, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/27910533/the-conceptual-design-of-interferometer-polarimeter-system-on-hl-2m
#2
Y Zhou, H X Wang, Y G Li, Y Li, W J Chen, J Yi, Z C Deng
HL-2M is a new medium-sized tokamak with major radius of 1.78 m, minor radius of 0.65 m, and aspect ratio of 2.8 and will be finished soon. In the conceptual design, a double-pass, horizontal view, multi-channel far-infrared (FIR) laser interferometer/polarimeter system (at 432 μm) is proposed to simultaneously measure the phase change and the Faraday rotation for density and current profile reconstruction. A vertical CO2 dispersion interferometer system (with wavelength of 10.6 μm and 5.3 μm) is designed to measure the line density, which will mainly be used for density feedback...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910496/design-of-a-dispersion-interferometer-combined-with-a-polarimeter-to-increase-the-electron-density-measurement-reliability-on-iter
#3
T Akiyama, A Sirinelli, C Watts, P Shigin, G Vayakis, M Walsh
A dispersion interferometer is a reliable density measurement system and is being designed as a complementary density diagnostic on ITER. The dispersion interferometer is inherently insensitive to mechanical vibrations, and a combined polarimeter with the same line of sight can correct fringe jump errors. A proof of the principle of the CO2 laser dispersion interferometer combined with the PEM polarimeter was recently conducted, where the phase shift and the polarization angle were successfully measured simultaneously...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910428/design-of-a-digital-holography-system-for-pfc-erosion-measurements-on-proto-mpex
#4
C E Tommy Thomas, T M Biewer, L R Baylor, S K Combs, S J Meitner, J Rapp, D L Hillis, E M Granstedt, R Majeski, R Kaita
A project has been started at ORNL to develop a dual-wavelength digital holography system for plasma facing component erosion measurements on prototype material plasma exposure experiment. Such a system will allow in situ real-time measurements of component erosion. Initially the system will be developed with one laser, and first experimental laboratory measurements will be made with the single laser system. In the second year of development, a second CO2 laser will be added and measurements with the dual wavelength system will begin...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910311/improved-density-profile-measurements-in-the-c-2u-advanced-beam-driven-field-reversed-configuration-frc-plasmas
#5
M Beall, B H Deng, H Gota
In the prior C-2 experiment, electron density was measured using a two-color 6-chord CO2/HeNe interferometer. Analysis shows that high-frequency common mode phase noise can be reduced by a factor of 3 by constructing a reference chord. In the system upgrade from C-2 to C-2U a 4-chord far-infrared laser interferometer was developed, which demonstrated superior sensitivity (1 × 10(16) m(-2) at >1 MHz bandwidth) and solved the under spatial sampling issue of the C-2 interferometer system. Improved density-profile measurement results are presented in this paper, including evidence of fast-ion modified density profile and stabilization of the n = 1 plasma wobble mode...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909442/strong-coupling-of-shoot-assimilation-and-soil-respiration-during-drought-and-recovery-periods-in-beech-as-indicated-by-natural-abundance-%C3%AE-13-c-measurements
#6
Carola H Blessing, Matti Barthel, Lydia Gentsch, Nina Buchmann
Drought down-regulates above- and belowground carbon fluxes, however, the resilience of trees to drought will also depend on the speed and magnitude of recovery of these above- and belowground fluxes after re-wetting. Carbon isotope composition of above- and belowground carbon fluxes at natural abundance provides a methodological approach to study the coupling between photosynthesis and soil respiration (SR) under conditions (such as drought) that influence photosynthetic carbon isotope discrimination. In turn, the direct supply of root respiration with recent photoassimilates will impact on the carbon isotope composition of soil-respired CO2...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27900835/treatment-of-cutaneous-larva-migrans-with-a-single-session-of-carbon-dioxide-laser-a-study-of-ten-cases-in-the-philippines
#7
Livia Francine Soriano, Miriam Emily Piansay-Soriano
BACKGROUND: Cutaneous larva migrans (CLM) has a detrimental effect on patients' emotional and physical quality of life. Due to local unavailability of gold standard oral treatments for CLM, carbon dioxide laser was attempted. We present a case series where a single session of carbon dioxide laser treatment was associated with cessation of signs and symptoms of CLM. AIMS: The aim of this study was to assess the efficacy of a single session of carbon dioxide laser in the treatment of CLM...
November 29, 2016: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/27896190/the-use-of-locally-applied-vibration-to-minimize-pain-during-fractional-co2-laser-therapy-in-living-liver-donor-scar-management
#8
Sinyoung Song, Dong Hoon Choi, Tae Suk Oh
BACKGROUND: Fractional CO2 laser is an effective treatment for scars, but most patients complain about sharp burning pain, even after the application of lidocaine ointment. This study analyzed the impact of a vibrating device to nonpharmacologically reduce the acute pain of laser treatment, in accordance with the gate control theory of pain management. METHODS: This is a prospective study performed from May 2013 through March 2014. Fifty-three patients (mean age, 26...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27888829/treatment-of-seborrheic-keratosis-in-bilateral-external-auditory-canal-using-fiber-co2-laser
#9
Raşit Cevizci, Selin Üstün Bezgin, Gökhan Altın, Gülbin Oran, Yıldırım Ahmet Bayazıt
In this article, we report a 33-year-old female patient with lesions of bilateral external auditory canals who was treated using fiber CO2 laser without canaloplasty. Histopathological examination confirmed the diagnosis of irritated type seborrheic keratosis, which is rare in external auditory canal. Twelve months after the treatment, the patient showed no signs of recurrence.
September 2016: Kulak Burun Boğaz Ihtisas Dergisi: KBB, Journal of Ear, Nose, and Throat
https://www.readbyqxmd.com/read/27885682/fractional-laser-assisted-drug-uptake-impact-of-time-related-topical-application-to-achieve-enhanced-delivery
#10
Christina A Banzhaf, Daniel Thaysen-Petersen, Christiane Bay, Peter A Philipsen, Mette Mogensen, Tarl Prow, Merete Haedersdal
BACKGROUND AND OBJECTIVE: Ablative fractional laser (AFXL) is acknowledged to increase uptake of topically applied agents in skin. AFXL channels gradually close over time, which may impair this capability. The time frame for applying a drug after AFXL exposure remains to be established. The aim of this study, was to investigate the importance of time-related topical application after AFXL exposure and to relate resultant uptake in skin with AFXL channel morphology and skin integrity. STUDY DESIGN/MATERIALS AND METHODS: Buttock skin of healthy volunteers (n = 11) was exposed to 10,600 nm fractional CO2 laser using 5% density, 120 μm beam diameter, 15 mJ pulse energy...
November 25, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27885522/efficacy-and-safety-of-fractional-co2-laser-versus-fractional-er-yag-laser-in-the-treatment-of-facial-skin-wrinkles
#11
Reza M Robati, Elmira Asadi
Ablative fractional lasers were introduced for treating facial rhytides. Few studies have compared fractional CO2 and Er:YAG lasers on cutaneous photodamages by a split trial. The aim of the present study was to compare these modalities in a randomized controlled double-blind split-face design with multiple sessions and larger sample size compared to previous studies done before. Forty patients with facial wrinkles were enrolled. Patients were randomly assigned to receive three monthly treatments on each side of the face, one with a fractional CO2 and one with a fractional Er:YAG laser...
November 24, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27881884/towards-a-standard-for-the-dynamic-measurement-of-pressure-based-on-laser-absorption-spectroscopy
#12
K O Douglass, D A Olson
We describe an approach for creating a standard for the dynamic measurement of pressure based on the measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we plan on making an accurate determination of pressure and temperature. The goal is to achieve an absolute uncertainty for time-varying pressure of 5 % with a measurement rate of 100 kHz, which will in the future serve as a method for the traceable calibration of pressure sensors used in transient processes...
June 2016: Metrologia
https://www.readbyqxmd.com/read/27869377/physical-modalities-for-the-treatment-of-rosacea
#13
Maja A Hofmann, Percy Lehmann
Rosacea is characterised by a wide variety of vascular changes. Apart from telangiectasia and erythema, often so-called flushing occurs. These vascular abnormalities can be targeted with specific light and laser devices. In addition to KTP laser, pulsed dye laser (PDL) and Nd:YAG laser, also intense pulsed light devices (IPLs) are used. The described therapeutic effects include the reduction of vascular abnormalities and even improvement of papulopustular changes. While the KTP laser shows very good results in telangiectasia, the dye laser and IPL devices are used preferably in erythema...
December 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27869376/physikalische-methoden-zur-behandlung-der-rosazea
#14
Maja A Hofmann, Percy Lehmann
Die Rosazea ist durch vielfältige vaskuläre Veränderungen gekennzeichnet. Neben Teleangiektasien und Erythemen treten häufig auch sogenannte "Flushings" auf. Haupteinsatzgebiete von Licht- und Lasersystemen sind diese vaskulären Veränderungen, wie Erytheme und Teleangiektasien. Neben dem KTP-Laser, dem Farbstofflaser (PDL) und dem Nd:YAG-Laser kommen auch Blitzlampen (IPL) zum Einsatz. Neben der Rückbildung der vaskulären Komponente, ist auch eine Verbesserung der papulopustulösen Komponente beschrieben...
December 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27864031/fractional-co2-laser-treatment-of-the-vestibule-for-patients-with-vestibulodynia-and-genitourinary-syndrome-of-menopause-a-pilot-study
#15
Filippo Murina, Mickey Karram, Stefano Salvatore, Raffaele Felice
INTRODUCTION: Chronic vulvar pain and burning remains one of the most perplexing problems faced by practicing gynecologists. AIM: To evaluate the effectiveness and safety of the application of micro-ablative fractional CO2 laser to the vulvar vestibule in the management of patients with vulvar pain from vestibulodynia or genitourinary syndrome of menopause. METHODS: Patients (N = 70) underwent fractional micro-ablative CO2 laser treatment for vestibular pain plus vestibulodynia (n = 37) or genitourinary syndrome of menopause (n = 33)...
December 2016: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/27863673/laser-irradiation-to-produce-amorphous-pharmaceuticals
#16
Varin Titapiwatanakun, Junlathip Tankul, Abdul W Basit, Simon Gaisford
Using a high-power CO2 laser to irradiate powder beds, it was possible to induce phase transformation to the amorphous state. Irradiation of a model drug, indometacin, resulted in formation of a glass. Varying the settings of the laser (power and raster speed) was shown to change the physicochemical properties of the glasses produced and all irradiated glasses were found to be more stable than a reference glass produced by melt-quenching. Irradiation of a powder blend of paracetamol and polyvinylpyrrolidone K30 was found to produce a solid amorphous dispersion...
November 30, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27863081/organocatalytic-coupling-of-co2-with-oxetane
#17
Margot Alves, Bruno Grignard, Amélie Boyaval, Raphael Méreau, Julien De Winter, Pascal Gerbaux, Christophe Detrembleur, Thierry Tassaing, Christine Jérôme
The organocatalytic coupling of CO2 with oxetanes is investigated under solvent-free conditions. The influence of the main reaction parameters (type of organocatalytic system, pressure, and temperature) on the yield, the product formed, and the selectivity of the reaction are discussed. An onium salt combined with a fluorinated alcohol promotes the efficient and selective organocatalytic synthesis of α,ω-hydroxyl oligocarbonates by coupling CO2 with oxetanes at 130 °C and at a CO2 pressure as low as 2 MPa...
November 15, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27862066/fractional-co2-laser-treatment-of-caesarean-section-scars-a-randomized-controlled-split-scar-trial-with-long-term-follow-up-assessment
#18
Katrine E Karmisholt, Elisabeth H Taudorf, Camilla B Wulff, Emily Wenande, Peter A Philipsen, Merete Haedersdal
BACKGROUND AND OBJECTIVES: Caesarean section (c-section) scars can be pose functional and cosmetic challenges and ablative fractional laser (AFXL) treatment may offer benefit to patients. We evaluated textural and color changes over time in AFXL-treated versus untreated control scars. MATERIALS AND METHODS: A randomized, controlled, intra-individual split-scar trial with three sessions of AFXL-treatments for mature c-section scars. Settings of AFXL were adjusted to each individual scar...
November 8, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27859300/potassium-titanyl-phosphate-laser-welding-following-complete-nerve-transection
#19
Neel K Bhatt, Christopher Mejias, Dorina Kallogjeri, Derrick C Gale, Andrea M Park, Randal C Paniello
OBJECTIVES/HYPOTHESIS: Cranial nerve transection during head and neck surgery is conventionally repaired by microsuture reanastomosis. Laser nerve welding (LNW), using CO2 laser to spot-weld the epineurium of transected nerve endings, has been shown in animal models to be a novel alternative to microsuture repair. This method avoids needle/suture material and minimizes instrumentation of the nerve. We hypothesized that potassium titanyl phosphate (KTP) laser would be superior to CO2 laser in repairing transected nerves...
November 16, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27858846/the-efficacy-of-fractional-carbon-dioxide-co2-laser-combined-with-luliconazole-1-cream-for-the-treatment-of-onychomycosis-a-randomized-controlled-trial
#20
Bing Rong Zhou, Yan Lu, Felicia Permatasari, He Huang, Jin Li, Juan Liu, Jia An Zhang, Dan Luo, Yang Xu
BACKGROUND: To evaluate the efficacy of fractional carbon dioxide (CO2) laser combined with luliconazole 1% cream for the treatment of onychomycosis and to compare it with that of fractional CO2 laser alone. METHODS: This was a randomized, parallel group, 2-arm, positive-controlled, single-center, superiority trial with a 1:2 allocation ratio. Sixty patients with clinical and mycological diagnosis of onychomycosis were enrolled from the Dermatology Department of the First Affiliated Hospital of Nanjing Medical University in Nanjing, China from March 2015 to May 2015...
November 2016: Medicine (Baltimore)
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