High-flow nasal oxygen therapy offers benefits like precise oxygen delivery, flow-related positive end-expiratory pressure generation and improved lung function. High-flow oxygen therapy can be applied via tracheostomy as high-flow tracheal oxygen. While high-flow tracheal oxygen has been used to facilitate weaning, it has diminished physiological effects due to bypassing upper airways. To enhance its effectiveness, researchers developed a modified high-flow tracheal oxygen tube with a smaller expiratory end diameter to increase airway resistance and pressure. This is a prospective randomized crossover study that aims to compare the physiological effects of standard and modified high-flow oxygen therapy in tracheostomized patients.
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Mean expiratory airway pressure
Timeframe: From enrollment to the end of treatment at 4 hours
Positive end-expiratory pressure
Timeframe: From enrollment to the end of treatment at 4 hours
Change of end-expiatory lung volume
Timeframe: From enrollment to the end of treatment at 4 hours