HFNO can be used during intraoperative period. HFNO reduces the risk of desaturation and prolongs the safe apnea time, compared with conventional oxygenation.~In laryngeal microsurgery, HFNO therapy make possible to perform tubeless anesthesia, providing perfect exposure of structure of the vocal cords.~HFNO have a risk for low level of positive pressure can make gastric distension, but gastric reflux or aspiration were not occurred during rapid sequence induction for emergency operation.~The purpose of this study is to investigate the effect of HFNO on gastric insufflation in paralyzed anesthetized patients undergoing laryngologic surgery.
Transnasal humidified rapid-insufflation ventilatory exchange(THRIVE), or also termed high flow nasal oxygenation (HFNO) is a method of supplying heated, humidified high concentrations of oxygen via nasal cavity.~The purpose of this study is to investigate the effect of HFNO on gastric insufflation in paralyzed anesthetized patients undergoing laryngologic surgery.