This is because, at high oscillation frequencies (20 Hz), the signal is dominated by the characteristics of the upper airways, whereas at low frequencies (below 10 Hz), the signal reflects the entire tracheobronchial tree, including small airway resistance
Toxicology studies have shown many potentially toxic components in e-cigarettes which include volatile organic compounds like benzene, lead, ultrafine particulate matter, diacetyl, nicotine, nickel, and tin [115]
Fieldwork Dates 24th27th February 2014 The survey, conducted to coincide with Wednesdays National No Smoking Day, identifies smoking and e-cigarette user patterns amongst people who have used e-cigarettes in the UK since the New Year
This alone reduces the risk of lung diseases and other health complications
Typical examples of this are chronic discoid lupus erythematosus or lupus vulgaris