In Vitro Particle Size Distributions in Electronic and Conventional Cigarette Aerosols Suggest Comparable Deposition Patterns

Abstract

Nicotine delivery may depend on vaping technique, particle evolution, and cloud effects. Predicted 10% arterial and 15% venous delivery may describe bystander exposure better than vapers exposure.

Prevalence and Determinants of Secondhand Smoke Exposure Among Middle and High School Students

“…Use of e-cigarettes and other electronic nicotine delivery system (ENDS) in public indoor areas might passively expose bystanders (eg, children, nonsmokers) to nicotine and other potentially harmful constituents. [22][23][24][25][26][27][28] Moreover, some ENDS can be modified to deliver marijuana and other psychoactive substances. 29 Prohibitions on ENDS use in public places are critical to maintain clean indoor air standards and to help Self-reported SHS exposure in the home, in a vehicle, or at school was defi ned as a report by a student that he or she had breathed the smoke from someone who was smoking tobacco products in the specifi ed environment within the past 7 days.…”

A scattering methodology for droplet sizing of e-cigarette aerosols

“…Another group used an electrical mobility instrument, FMPS 3091, to report droplet size modes ranging from 120 to 165 nm for e-cigarette brands containing different levels of nicotine (Fuoco et al, 2014). For indoor air quality application, size distributions ranged from 20 to 300 nm (Geiss et al, 2015); in in vitro tests, size values were between 120 and 180 nm (Zhang et al, 2013). Additionally, in another study, the use of a light scattering methodology allowed to obtain a Volume Median Diameter for commercial e-cigarettes of & 435 nm when no dilution was applied (Cabot et al, 2013).…”

“…Although this approach is appropriate for product assessment, the cascade impactor is labor-intensive and unsuitable for product development support or for screening purposes when a fast response time is required. Recently, several working groups have performed size distribution measurements using analytical instruments applied to the mainstream of conventional cigarettes and e-cigarette products (Ingebrethsen et al, 2012;Zhang et al, 2012Zhang et al, , 2013. The use of real-time aerosol physical characterization techniques typically allows measurement of aerosol size distributions from which the MMAD is determined assuming the droplets are spherical.…”

Elektroninės cigaretės: naujas būdas mesti rūkyti ar nauja grėsmė?

“…Naudojant tiek įprastas, tiek elektronines cigaretes, nikotinas didina širdies susitraukimų dažnį, o kraujyje susidaro reikšmingai didelis nikotino metabolito kotinino kiekis (40). Įtraukiamo ir į kraują patenkančio nikotino kiekis skiriasi priklausomai nuo nikotino koncentracijos skystyje, kitų skysčio komponentų, vartotojo patirties, įtraukimų intensyvumo, prietaiso charakteristikos bei garinimo technikos (40)(41). Patyrę elektroninių cigarečių vartotojai dažniausiai įtraukia garus giliau ir prietaisą naudoja kur kas intensyviau nei pradedantieji, todėl jų kraujyje nikotino kiekis yra didesnis ir beveik pasiekia susidarantį rūkant įprastas cigaretes (42).…”