Understanding the influence of atomizing power on electronic cigarette aerosol size and inhalation dose estimation

Abstract

Although many studies have estimated the inhalation dose of aerosols emitted from electronic cigarettes (e-cigs), the association between the atomizing power and inhalation dose of e-cig aerosols has not been fully examined. The aim of this study was to determine the mass and inhalation doses of e-cig aerosols and their association with the atomizing power of vaping devices. Size-segregated aerosol masses were collected using an 11-stage cascade impactor and the deposition dose in the human respiratory tract was estimated using the size-segregated aerosol mass. The results showed that an increase in atomizing power was positively associated with the amount of aerosol mass generated (p-value < 0.001). The mass median aerodynamic diameter and mass mean diameter of aerosol were 0.91 μm and 0.84 μm, respectively. The average deposition fractions of aerosols in the head airway, tracheobronchial region, and alveolar region were 67.2, 6.2, and 26.6%, respectively. In conclusion, vaping with a higher atomizing power increases the e-cig aerosol inhalation dose in the airway.

Copyright © 2023 American Association for Aerosol Research

Editor:

• Mark Swihart

Disclosure statement

The authors report there are no competing interests to declare.

Additional information

Funding

This research was supported, in part, by the National Institute Environmental Health Sciences (NIEHS) under Grant (R21ES031795); and by a Pilot award from Gulf Coast Center for Precision Environmental Health (GC-CPEH), an NIEHS P30 Environmental Health Sciences Core Center under Grant (P30ES030285) at Baylor College of Medicine.