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https://www.readbyqxmd.com/read/28729139/endoscope-drying-and-its-pitfalls
#1
REVIEW
J Kovaleva
Inadequate drying of endoscope channels is a possible cause of replication and survival of remaining pathogens during storage. The presence during storage of potentially contaminated water in endoscope channels may promote bacterial proliferation and biofilm formation. An incomplete drying procedure or lack of drying and not storing in a vertical position are the most common problems identified during drying and endoscope storage. Inadequate drying and storage procedures, together with inadequate cleaning and disinfection, are the most important sources of endoscope contamination and post-endoscopic infection...
July 17, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28723191/highly-enriched-controllable-continuous-aerosol-sampling-using-inertial-microfluidics-and-its-application-to-real-time-detection-of-airborne-bacteria
#2
Jeongan Choi, Seung Chan Hong, Woojin Kim, Jae Hee Jung
We report a novel microfluidic technique for sampling of aerosols into liquids. The two-phase fluid, sampling air and collecting liquid, forms a stratified flow in the curved microchannel. By passing fluids through the curved region, the particles are transferred from air into the liquid phase by the particle centrifugal and drag forces. This microfluidic-based aerosol-into-liquid sampling system, called the MicroSampler, is driven by particle inertial differences. To evaluate the physical particle collection efficiency of the MicroSampler, we used standard polystyrene-latex (PSL) particles ranging in size from 0...
April 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28720185/statin-therapy-in-low-risk-air-force-aviators-with-isolated-hypercholesterolemia
#3
Anthony P Tvaryanas, Heather J Mahaney, Valarie M Schroeder, Genny M Maupin
INTRODUCTION: This study evaluated the use of statin therapy in U.S. Air Force (USAF) aviators with isolated hypercholesterolemia in terms of compliance with clinical practice guidelines (CPGs) and effectiveness in reducing low-density lipoprotein cholesterol (LDL-C) and coronary heart disease (CHD) risk. METHODS: This was a mixed design, 8-yr retrospective study that included 8185 participants with isolated hypercholesterolemia, of which 1458 (17.81%) were prescribed statin monotherapy...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28720183/g-loc-warning-algorithms-based-on-emg-features-of-the-gastrocnemius-muscle
#4
Sungho Kim, Taehwan Cho, Yongkyun Lee, Hyojin Koo, Booyong Choi, Dongsoo Kim
BACKGROUND: G-induced loss of consciousness (G-LOC) is mainly caused by failure to sustain an oxygenated blood supply to the pilot's brain because of the sudden acceleration in the direction of the +Gz axis, and is considered a critical safety issue. The purpose of this study was to develop G-LOC warning algorithms based on monitoring electromyograms (EMG) of the gastrocnemius muscle on the calf. METHODS: EMG data was retrieved from a total of 67 pilots and pilot trainees of the Korean Air Force during high-G training on a human centrifugal simulator...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28719431/bispectral-index-measurements-are-not-degraded-during-aeromedical-evacuations
#5
Nicolas Donat, Audrey Cirodde, Clément Hoffmann, Jean-Vivien Schaal, Yannick Masson, Antoine Nau, Paul Vincent Martin, Samuel Madec, Thomas Leclerc
For a decade, depth of anesthesia monitoring has become a reality in the operating room. It provides valuable help for managing anesthesia, especially for unstable patients. This might be particularly relevant during aeromedical evacuation. In this study, we aimed to assess the validity of the bispectral index (BIS) during long-range patient transportation aboard fixed-wing aircraft. BIS was recorded in 30 patients, 25 under anesthesia and 5 awake, during aeromedical evacuations performed by the French Air Force...
July 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28713524/forced-air-warming-discontinued-periprosthetic-joint-infection-rates-drop
#6
REVIEW
Scott D Augustine
Several studies have shown that the waste heat from forced-air warming (FAW) escapes near the floor and warms the contaminated air resident near the floor. The waste heat then forms into convection currents that rise up and contaminate the sterile field above the surgical table. It has been shown that a single airborne bacterium can cause a periprosthetic joint infection (PJI) following joint replacement surgery. We retrospectively compared PJI rates during a period of FAW to a period of air-free conductive fabric electric warming (CFW) at three hospitals...
June 23, 2017: Orthopedic Reviews
https://www.readbyqxmd.com/read/28713110/an-innovative-approach-to-retention-thermoplastic-retainer
#7
K A Adam Ozeer, Sumitha A David, Umar Mohamed, P C Sunil, Sam Paul, Parson Paul
AIM: The aim of this study was to design and introduce a retainer that overcomes the common shortcomings seen in other retainers. MATERIALS AND METHODS: Hard thermoplastic sheet of 0.5 mm thickness is vacuum or pressure-molded onto the patient cast. Lingual portion of the retainer is trimmed according to the contours of the anterior teeth. Contact points between the maxillary and mandibular anterior teeth are marked on the retainer and reduced. Punch cut holes are placed on the retainer for the exit of flash and air bubbles while fixation...
July 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28713086/intensifying-approach-to-the-therapy-of-patients-with-constellation-of-the-diseases-chronic-obstructive-pulmonary-disease-and-osteoarthritis
#8
Vyacheslav N Zhdan, Maksim М Potyazhenko, Galina S Khaymenova, Nadezhda N Lyulka, Tatyana V Dubrovinskaya, Igor V Ivanitsky
INTRODUCTION: Chronic obstructive pulmonary disease (COPD) is one of 21st century. About 210 million people all over the world are suffering with COPD, and annually 3 million people die of it. Under the influence of different factors, such as smoking, air prolusion, evaporation of chemicals, poisoning effect of chemical firings, inflammation processes take place in lungs, and if it is prolonged and take place simultaneously with morphological changes in the lungs, it it provide the de4velopment of the systemic inflammation process...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28711304/comparing-reach-chemical-safety-assessment-information-with-practice-a-case-study-of-polymethylmethacrylate-pmma-in-floor-coating-in-the-netherlands
#9
Ton Spee, Daan Huizer
On June 1st, 2007 the European regulation on Registration, Evaluation and Restriction of Chemical substances (REACH) came into force. Aim of the regulation is safe use of chemicals for humans and for the environment. The core element of REACH is chemical safety assessment of chemicals and communication of health and safety hazards and risk management measures throughout the supply chain. Extended Safety Data Sheets (Ext-SDS) are the primary carriers of health and safety information. The aim of our project was to find out whether the actual exposure to methyl methacrylate (MMA) during the application of polymethylmethacrylate (PMMA) in floor coatings as assessed in the chemical safety assessment, reflect the exposure situations as observed in the Dutch building practice...
June 4, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28709223/instability-evolution-of-the-viscous-elliptic-liquid-jet-in-the-rayleigh-regime
#10
Shibo Gu, Lipo Wang, David L S Hung
For jet flow emanating from noncircular orifices, an unbalanced surface tension force leads to capillary instability, which is independent of influence from the ambient air in the Rayleigh regime. In the present article, the dynamic behavior of incompressible elliptical jets in the Rayleigh regime is investigated. Theoretically, with the consideration of the fluid viscosity, the solution of the Cosserat equation consists of a particular solution and a complementary solution. For the complementary solution the wave number of disturbance modes has two complex conjugate roots, which are responsible for the jet breakup...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28701036/characterization-of-surface-active-biofilm-protein-bsla-in-self-assembling-langmuir-monolayer-at-the-air-water-interface
#11
Wei Liu, Shanghao Li, Zhuguang Wang, Elsa C Y Yan, Roger M Leblanc
Biofilm is an extracellular matrix of bacteria and serves as a protective shield of bacterial communities. It is crucial for microbial growth and one of the leading causes of human chronic infections as well. However, the structures and molecular mechanism of biofilm formation remain largely unknown. Here, we examined a protein, BslA, expressed in the biofilms of Bacillus subtilis. We characterized the Langmuir monolayers of BslA at the air/water interface. Using techniques in surface chemistry and spectroscopy, we found that BslA forms a stable and robust Langmuir monolayer at the air/water interface...
July 12, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28699827/evaluation-of-a-passive-method-for-determining-particle-penetration-through-protective-clothing-materials
#12
Peter A Jaques, Lee Portnoff
The risk of workers' exposure to aerosolized particles has increased with the upsurge in the production of engineered nanomaterials. Currently, a whole-body standard test method for measuring particle penetration through protective clothing ensembles is not available. Those available for respirators neglect the most common challenges to ensembles, because they use active vacuum-based filtration, designed to simulate breathing, rather than the positive forces of wind experienced by workers. Thus, a passive method that measures wind-driven particle penetration through ensemble fabric has been developed and evaluated...
July 12, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28699620/aerodynamics-and-flow-features-of-a-damselfly-in-takeoff-flight
#13
Ayodeji Toluwanimi Bode-Oke, Samane Zeyghami, Haibo Dong
Flight initiation is fundamental for survival, escape from predators and lifting payload from one place to another in biological fliers and can be broadly classified into jumping and non-jumping takeoffs. During jumping takeoffs, the legs generate most of the initial impulse. Whereas the wings generate most of the forces in non-jumping takeoffs, which are usually voluntary, slow, and stable. It is of great interest to understand how these non-jumping takeoffs occur and what strategies insects use to generate large amount of forces required for this highly demanding flight initiation mode...
July 12, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28698671/morphology-composition-and-mixing-state-of-primary-particles-from-combustion-sources-crop-residue-wood-and-solid-waste
#14
Lei Liu, Shaofei Kong, Yinxiao Zhang, Yuanyuan Wang, Liang Xu, Qin Yan, A P Lingaswamy, Zongbo Shi, Senlin Lv, Hongya Niu, Longyi Shao, Min Hu, Daizhou Zhang, Jianmin Chen, Xiaoye Zhang, Weijun Li
Morphology, composition, and mixing state of individual particles emitted from crop residue, wood, and solid waste combustion in a residential stove were analyzed using transmission electron microscopy (TEM). Our study showed that particles from crop residue and apple wood combustion were mainly organic matter (OM) in smoldering phase, whereas soot-OM internally mixed with K in flaming phase. Wild grass combustion in flaming phase released some Cl-rich-OM/soot particles and cardboard combustion released OM and S-rich particles...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28696476/on-the-origin-of-the-driving-force-in-the-marangoni-propelled-gas-bubble-trapping-mechanism
#15
A Miniewicz, C Quintard, H Orlikowska, S Bartkiewicz
Gas bubbles can be trapped and then manipulated with laser light. In this report, we propose the detailed optical trapping mechanism of gas bubbles confined inside a thin light-absorbing liquid layer between two glass plates. The necessary condition of bubble trapping in this case is the direct absorption of light by the solution containing a dye. Due to heat release, fluid whirls propelled by the surface Marangoni effect at the liquid/gas interface emerge and extend to large distances. We report the experimental microscopic observation of the origin of whirls at an initially flat liquid/air interface as well as at the curved interface of a liquid/gas bubble and support this finding with advanced numerical simulations using the finite element method within the COMSOL Multiphysics platform...
July 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28695815/effectiveness-of-underbody-forced-air-warming-system-in-preventing-hypothermia-in-patients-undergoing-major-surgeries
#16
Hao Liang, Jie Yi
Objective To compare the effectiveness of the forced-air warming system and the conventional warming care practice in preventing hypothermia in patients undergoing major surgeries.Methods A total of 62 patients were enrolled in this study. Patients of both sexes,aged≥18 years,and with an ASA physical status Ⅰ-Ⅲ were included and allocated randomly into intervention group(n=30)or control group(n=32). Patients in the intervention group were provided forced-air warming,either prior to induction or during the surgery procedure depending on core temperature monitoring results...
June 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28695365/influence-of-external-cooling-on-the-femtosecond-laser-ablation-of-dentin
#17
Q T Le, R Vilar, C Bertrand
In the present work, the influence of external cooling on the temperature rise in the tooth pulpal chamber during femtosecond laser ablation was investigated. The influence of the cooling method on the morphology and constitution of the laser-treated surfaces was studied as well. The ablation experiments were performed on dentin specimens using an Yb:KYW chirped-pulse-regenerative amplification laser system (560 fs, 1030 nm). Cavities were created by scanning the specimens at a velocity of 5 mm/s while pulsing the stationary laser beam at 1 kHz and with fluences in the range of 2-14 J/cm(2)...
July 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28692835/biogeochemical-oxidation-of-calcium-sulfite-hemihydrate-to-gypsum-in-flue-gas-desulfurization-byproduct-using-sulfur-oxidizing-bacteria
#18
Duane Graves, Jacques J Smith, Linxi Chen, Allison Kreinberg, Brianna Wallace, Robby White
Flue gas desulfurization (FGD) is a well-established air treatment technology for coal and oil combustion gases that commonly uses lime or pulverized limestone aqueous slurries to precipitate sulfur dioxide (SO2) as crystalline calcium salts. Under forced oxidation (excess oxygen) conditions, FGD byproduct contains almost entirely (>92%) gypsum (CaSO4·2H2O), a useful and marketable commodity. In contrast, FGD byproduct formed in oxygen deficient oxidation systems contains a high percentage of hannebachite (CaSO3·0...
July 7, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28692015/the-association-between-particulate-matter-air-pollution-and-respiratory-health-in-elderly-with-type-2-diabetes-mellitus
#19
Yanhui Hao, Jing Zhao, Kan Wang, Nannan Feng, Pin Sun, Renjie Chen, Bin Han, Zhipeng Bai, Yiliang Zhu, Ying Gao, Zhao-Lin Xia
OBJECTIVE: We investigated the association between respiratory health and particulate matter (PM) air pollution in elderly type 2 diabetes mellitus (T2DM) pre-, during, and post-the Chinese Lunar New Year (CLNY) holiday in Shanghai, China. METHODS: We conducted repeated measurements of lung function and inflammation biomarker in a cohort consisted of 60 participants with T2DM. RESULTS: Decreased PM2.5 exposure had an effect on respiratory health by increasing in forced expiratory flow in 1 second (FEV1) and forced vital capacity (FVC)...
July 6, 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28689213/respiratory-abnormalities-among-occupationally-exposed-non-smoking-brick-kiln-workers-from-punjab-india
#20
Supriya Tandon, Sharat Gupta, Sharanjeet Singh, Avnish Kumar
BACKGROUND: Brick manufacturing industry is one of the oldest and fast-growing industries in India that employs a large section of people. Brick kiln workers are occupationally exposed to air pollutants. Nonetheless, only a few studies have so far been conducted on their respiratory health. OBJECTIVE: To investigate the extent of respiratory impairment in brick kiln workers and to correlate it with the duration of exposure. METHODS: A cross-sectional study was conducted...
July 2017: International Journal of Occupational and Environmental Medicine
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