Non-elastic resistance Airway resistance(main) Definition calculation R Pn-Piap(cmH,o Be Q,(L1s Factors affecting the airway resistance: Velocity of air flow: RAW OC VAF Type of air flow: Laminar flow turbulence Diameter of airway: Transmural pressure; Radiate traction by pulmonary parenchyma; Autonomic nervous system; Chemical factorsNon-elastic resistance Airway resistance (main) Definition & Calculation Q (L/s) P P (cmH O) R A ASP IAP AW − 2 = Factors affecting the airway resistance: Velocity of air flow: RAW  VAF Type of air flow: Laminar flow & Turbulence Diameter of airway: Transmural pressure; Radiate traction by pulmonary parenchyma; Autonomic nervous system; Chemical factors