“…More recently, pre-oxygenation using a non-re-breather face mask followed by apnoeic oxygenation by insufflating oxygen at a flow rate of 15 L/min via nasal cannula (NO-DESAT) and the continuous delivery of transnasal highflow humidified oxygen (THRIVE) have been reported as methods to reduce desaturation in high risk intubations, with the latter having been shown to extend the safe apnoea time between 5-65 minutes [12,7]. NO-DESAT has demonstrated effectiveness in both emergency department and out of hospital settings [12,13] and THRIVE has been shown to be useful in elective surgical and critical care patients [7,8]. Whilst both NO-DESAT and THRIVE provide apnoeic oxygenation, NO-DESAT is reliant on pre-oxygenation with either a non-rebreather or anaesthetic facemask and does not provide CPAP.…”