Final answer:
Nasal airways are sized based on nostril diameter to ensure a proper fit that is specific to a patient's nasal passage anatomy, which is important for allowing clear airflow from the nasal cavity through to the alveoli.
Step-by-step explanation:
Nasal airways are sized by using nostril diameter rather than age, weight, or height. The correct sizing of nasal airways is critical to ensure proper fit and avoid potential complications. Nasal airway sizing can involve measuring the nostril diameter alongside considering the unique anatomy of the patient's nasal passage to select the best fitting nasal airway device. This size must accommodate the natural curvature of the nasal passages to ensure air can flow freely into the lungs during respiration.
The Order of Airflow During Inhalation
The correct order of airflow during inhalation is nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, and finally, alveoli. The air first enters through the nasal cavity, where it is filtered, warmed, and humidified. It then travels through the pharynx and larynx, into the trachea, which branches into the right and left bronchi, followed by further branching into bronchioles, and ultimately reaching the alveoli where gas exchange occurs