Does High Flow Nasal Cannula placed before extubation with a fraction of inspired oxygen adjusted to a lower level prevent the formation of atelectasis after extubation: A prospective double-blinded randomized controlled trial. - HFNC before extubation

The incidence of atelectasis formation that integrated 3 days data of RAS score (Group A:69.6%, H:81% p=0.38), RAS score of each day, and the rate of atelectasis formation at each day, had no significant difference. However, the P/F ratio measured 1 hour after extubation of Group A was significantly higher than that of Group H (360 vs. 265) in repeated measure ANOVA. The re-intubation ratio of Group A tended to be lower than that of Group H (0% vs. 14.3% p=0.06).