Hadanny A, Zubari T, Tamir-Adler L, et al. - In this prospective analysis of patients receiving the currently used hyperbaric oxygen therapy (HBOT) protocol, researchers focused on the influence of HBOT on pulmonary functions. Participants were 18 years or older patients scheduled for 60 daily HBOT sessions between 2016 and 2018. At baseline and post-HBOT, measurements of pulmonary functions including forced vital capacity (FVC), forced expiratory volume in 1 sec and peak expiratory flow rate (PEF) were performed. Findings revealed the safety of repeated hyperbaric oxygen exposure, based on the currently used HBOT protocol, as far as pulmonary functions were concerned. Surprisingly, in the current cohort of patients who were without chronic lung diseases, PEF and FVC showed a modest non clinically significant but statistically significant improvement.