THC vape use patterns and device features: Observations from user-posted videos

<ns3:p> Background Tetrahydrocannabinol (THC) vaping has become increasingly prevalent, yet available empirical data on puffing behavior during THC vape use remain limited. This study aimed to characterize the puff duration of people who use THC vapes by analyzing publicly available YouTube videos. Additional observations included device type, liquid composition, and notable user behaviors. Methods YouTube was systematically searched using predefined search terms related to THC vaping. Videos published between 2018 and 2024 were screened for inclusion based on clear visibility of puffing events. A total of 100 videos were included in the analysis. Puff initiation and termination were defined by visible facial muscle contraction and relaxation, respectively. Puff duration was determined using frame-by-frame analysis. Results The mean puff duration obtained from 456 analyzed puffs was 3.68 seconds with no significant differences between cartridge and disposable devices ( <ns3:italic>p</ns3:italic> =0.1). Behavioral observations included engagement in extended puffing, coughing, and subjective description of aerosol harshness and flavor. Conclusions The observed puff durations during THC vape use closely aligned with those previously reported for electronic nicotine delivery systems (ENDS), suggesting that ENDS puffing regimens may be appropriate for preliminary emissions testing of THC vape products. However, distinct user behaviors reported in this study highlight the need for THC vape specific protocols that reflect real-word use patterns. </ns3:p>