Airway Resistance = (P_peak - P_plat) / Inspiratory Flow Rate

Normal range of results: 0.6-2.4 cmH₂O/(L*s)

Airway resistance can effectively reflect the condition of airway obstruction. It can help determine whether the cause of reduced lung ventilation function is from the airway. Bronchial asthma, emphysema, and obstructive ventilatory dysfunction can all cause increased airway resistance; additionally, tracheal intubation or cannula, and mechanical ventilation pipelines can also cause increased airway resistance.