3D printers 1 Aerodynamics 1 Airway pressures 1 Anatomical dead space 1 Dead space 1 Dead space washout High flow 1 Nasal high-flow therapy 1 Positive end expiratory pressures 1 Positive end-expiratory pressure 1 Pressure distribution 1 Respiratory mechanics 1 Respiratory system 1 Uniform pressure 1 Upper airway 1 Working mechanisms 1 adult 1 airway pressure 1 article 1 breathing 1 controlled study 1 flow rate 1 high flow nasal cannula therapy 1 human 1 infant 1 nose cavity 1 positive end expiratory pressure ventilation 1 upper respiratory tract 1