Preoxygenation With a High-flow Nasal Cannula or a Simple Mask Before General Anesthesia in Head and Neck Surgery

Objectives: To assess arterial oxygen partial pressure (PaO2) at defined time points during the preoxygenation and to compare between high flow heated humidified nasal oxygen versus standard preoxygenation with oxygen insufflation via face mask over at least 5 minutes Methods: This randomized, single-blinded, prospective study was conducted at Asan Medical Center in Seoul, Republic of Korea. Populations: Patients undergoing head and neck surgery Expected outcomes: The course of PaO2 levels is superior to those of the face mask during the whole preoxygenation procedure and after the intubation.