Fig. 1From: Preoxygenation with standard facemask combining apnoeic oxygenation using high flow nasal cannula versuss standard facemask alone in patients with and without obesity: the OPTIMASK international studyStudy design. EtO2 end-tidal oxygen, PEEP positive end expiratory pressure, HFNO High-Flow Nasal cannula Oxygen, RR respiratory rate, RSI rapid sequence inductionBack to article page