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Circadian Puffing Behavior and Topography Among E-cigarette Users.

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Electronic cigarette (e-cigarette) users exhibit significant variability in puffing behavior over 24 hours. Understanding these diverse puffing patterns is crucial for accurate e-cigarette aerosol generation in research.

Keywords:
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Area of Science:

  • Tobacco Regulatory Science
  • Pulmonary Toxicology

Background:

  • Electronic cigarette (e-cigarette) use is widespread, necessitating a detailed understanding of user behavior.
  • Puffing topography significantly influences the dose and composition of inhaled e-cigarette aerosol.

Purpose of the Study:

  • To characterize puffing behavior and topography in regular e-cigarette users over a 24-hour period.
  • To identify patterns and variability in daily e-cigarette use.

Main Methods:

  • Twenty-four adult e-cigarette users vaped their own devices ad-libitum for 24 hours.
  • Puffing events were recorded using calibrated CReSS pocket topography monitors.
  • Key metrics analyzed included puff frequency, puff volume, puff duration, puff flow rate, and inter-puff interval.

Main Results:

  • Participants averaged 156.2 puffs per day, occurring in sessions of 10.2 puffs.
  • Average puff duration was 3.0 seconds, with a volume of 73.4 ml and a flow rate of 24.7 ml/sec.
  • Significant variability was observed in puffing intervals (15.4 seconds) and other topographical measures.

Conclusions:

  • Substantial individual variability exists in e-cigarette puffing behavior.
  • Validated puffing protocols for laboratory studies should account for both common and intensive puffing patterns.
  • Accurate simulation of real-world e-cigarette use is essential for reliable research outcomes.