The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Jeanfrancois Etter - One of the best experts on this subject based on the ideXlab platform.
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an online survey of users of tobacco Vaporizers reasons and modes of utilization perceived advantages and perceived risks
BMC Public Health, 2019Co-Authors: Sebastien Queloz, Jeanfrancois EtterAbstract:Tobacco Vaporizers heat tobacco without burning it, to produce an inhalable aerosol. Various models have recently appeared on the market, mostly manufactured by the tobacco industry, but few of the studies published on tobacco Vaporizers are independent from the manufacturers. The goals of this study were to explore who uses tobacco Vaporizers, how these products are used, reasons for utilization, perceived advantages and risks. Online questionnaire collected from October 2016 to January 2018 in self-selected visitors aged > 18 to an anti-addiction website. We obtained 170 valid responses, of whom 104 were using tobacco Vaporizers. For homogeneity, we included only the 102 users of the Brand 1 tobacco vaporizer in our analysis, as there were only two users of other Vaporizers. Among these 102 vaporizer users, about half were current cigarette smokers (57%), the rest were former cigarette smokers. The median age was 41, and the median duration of utilization was 9 months. Most (88%) used the vaporizer daily, 8% were occasional users and 4% were past users. Among current smokers, 80% were currently trying to reduce their cigarette consumption and 29% were trying to quit. The vaporizer was used mainly to replace cigarettes (94%), because it was perceived to be less toxic than cigarettes (89%), to help stop smoking or to avoid starting smoking again (72%), or to reduce cigarette consumption (71%). Current smokers who were daily or occasional vaporizer users reported smoking a median of 8.0 cigarettes per day, compared with 20.0 per day before they started to use the vaporizer (p < .0001, Wilcoxon signed-rank test). In this online sample of early adopters, Brand 1 was by far the most frequently used tobacco vaporizer. It was used by current or former smokers only, mainly to replace cigarettes, and satisfaction ratings were good. Users considered the tobacco vaporizer to be less toxic than cigarette smoke and perceived it to be helpful for reducing or stopping smoking.
Sebastien Queloz - One of the best experts on this subject based on the ideXlab platform.
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an online survey of users of tobacco Vaporizers reasons and modes of utilization perceived advantages and perceived risks
BMC Public Health, 2019Co-Authors: Sebastien Queloz, Jeanfrancois EtterAbstract:Tobacco Vaporizers heat tobacco without burning it, to produce an inhalable aerosol. Various models have recently appeared on the market, mostly manufactured by the tobacco industry, but few of the studies published on tobacco Vaporizers are independent from the manufacturers. The goals of this study were to explore who uses tobacco Vaporizers, how these products are used, reasons for utilization, perceived advantages and risks. Online questionnaire collected from October 2016 to January 2018 in self-selected visitors aged > 18 to an anti-addiction website. We obtained 170 valid responses, of whom 104 were using tobacco Vaporizers. For homogeneity, we included only the 102 users of the Brand 1 tobacco vaporizer in our analysis, as there were only two users of other Vaporizers. Among these 102 vaporizer users, about half were current cigarette smokers (57%), the rest were former cigarette smokers. The median age was 41, and the median duration of utilization was 9 months. Most (88%) used the vaporizer daily, 8% were occasional users and 4% were past users. Among current smokers, 80% were currently trying to reduce their cigarette consumption and 29% were trying to quit. The vaporizer was used mainly to replace cigarettes (94%), because it was perceived to be less toxic than cigarettes (89%), to help stop smoking or to avoid starting smoking again (72%), or to reduce cigarette consumption (71%). Current smokers who were daily or occasional vaporizer users reported smoking a median of 8.0 cigarettes per day, compared with 20.0 per day before they started to use the vaporizer (p < .0001, Wilcoxon signed-rank test). In this online sample of early adopters, Brand 1 was by far the most frequently used tobacco vaporizer. It was used by current or former smokers only, mainly to replace cigarettes, and satisfaction ratings were good. Users considered the tobacco vaporizer to be less toxic than cigarette smoke and perceived it to be helpful for reducing or stopping smoking.
Rodrigo P Teixeira - One of the best experts on this subject based on the ideXlab platform.
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steam Vaporizers a danger for paediatric burns
Burns, 2016Co-Authors: Sarah Lonie, Paul Baker, Rodrigo P TeixeiraAbstract:Abstract Background Steam Vaporizers are used to humidify air in dry environments. They are marketed to moisten children's airway secretions and thus to help relieve symptoms associated with upper respiratory tract infections. Unfortunately the steam emitted from the unit can also pose a significant risk of burns to children. Our study aimed to ascertain patterns of injury and treatment outcomes from steam burns resulting from these devices. Potential preventative measures are discussed. Methods Children who had sustained vaporizer scald burns were identified at the outpatient burns clinic over a 10-month period (November 2014–August 2015). Medical records were reviewed retrospectively and data collected on pattern of injury, management and outcomes. Results Ten children were treated for vaporizer steam burns over the study period. The mean age was 1.6 years and 8 (80%) patients were male. Operative intervention was undergone in 5 (50%) cases; four acutely and one as a secondary reconstructive procedure. Hand burns accounted for 8 (80%) of cases. Conclusions Steam Vaporizers can cause significant burns in the paediatric population. Toddlers were most at risk, frequently sustaining hand burns that underwent skin grafting. Greater public awareness of the danger is indicated and measures to prevent such injuries should be addressed by appropriate authorities.
Stephen G. Graham - One of the best experts on this subject based on the ideXlab platform.
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The desflurane Tec 6 vaporizer
British journal of anaesthesia, 1994Co-Authors: Stephen G. GrahamAbstract:A late development model of the Tec 6 vaporizer for the administration of desflurane vapour has been evaluated, It is heated electrically and has both electronic monitors of vaporizer function and alarms. The new filling system is a significant improvement over previous Tec filling systems. The vaporizer requires a warm-up period before it may be used, but when activated it provides an output that is approximately linear between 1 and 18% vapour concentrations, at flow rates between 200 ml min−1 and 10 litre min−1. (Br. J. Anaesth. 1994; 72: 470–473)
Tao Ren - One of the best experts on this subject based on the ideXlab platform.
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A fast calculation method of thermodynamic properties of variable-composition natural gas mixtures in the supercritical pressure region based on implicit curve-fitting
Journal of Natural Gas Science and Engineering, 2017Co-Authors: Tingting Wang, Chao Ding, Guoliang Ding, Dan Zhao, Tao RenAbstract:Abstract Vaporizers are widely used to re-gasify the liquefied natural gas which consists of variable compositions at supercritical pressures. The duration of vaporizer design based on simulations severely depends on the calculation speed of thermodynamic properties of natural gas due to millions of thermodynamic property iterations. This paper presents a fast calculation method of thermodynamic properties of natural gas in supercritical pressure region. In this method, a calculation model for a reference composition is established at first, by dividing the supercritical pressure region into three subsections and regressing each subsection separately based on implicit curve-fitting; and then composition based implicit curve-fitting equations are developed to extend thermodynamic property calculation from the reference composition to any variable compositions. With this method, the equations for typical compositions of natural gas including C 1 , C 2 , C 3 , n -C 4 , n -C 5 and N 2 are presented, covering the temperature range from −170 °C to 60 °C and the pressure range from 5 MPa to 10 MPa. The present method is about 10 4 times faster than GERG-2008, and the mean deviation is less than 0.5%.
