Passive Vape Exposure From E-Cigarettes Linked to Acute Health Effects in COPD.
Rosenkilde Laursen K, Bønløkke JH, et al. An RCT of acute health effects in COPD-patients after passive vape exposure from e-cigarettes. Eur Clin Respir J. 2020;8(1):1861580.
In a double-blinded crossover study 16 non-smoking COPD-patients (mean age 68) were randomly exposed for 4 h to passive vape (median PM2.5: 18 µg/m3 (range: 8–333)) and clean air (PM2.5 < 6 µg/m3) separated by 14 days. Particles were measured using an ultrafine particle counter (P-TRAK) and a scanning mobility particle sizer (SMPS). Health effects including Surfactant Protein-A (SP-A) and albumin in exhaled air, spirometry, FeNO, and plasma proteins were evaluated before, right after, and 24 hours after exposure.
SP-A in exhaled air was negatively affected by exposure to vape and several plasma proteins increased significantly. Throat irritation was more pronounced during passive vape exposure, while FVC and FEV1 decreased, however, not significantly.
Comment: Results show that passive vape exposure is potentially harmful. Stephen Hamann
