4. You have a lung model whose airway flow is 90 liters/minute. The pressure at one...
4. You have a lung model whose airway flow is 90 liters/minute. The pressure at one end of the airway is 40 cm H2O, and the pressure at the other end of the airway is 5 cm H2O. What is the value for airway resistance in this model (watch your units!)?
Homework Answers
Airway resistance is the ratio of change in pressure to flow rate of air.
=Change in airway pressure/ flow f air
Airway flow =90 L/minute= 1.5 L/sec
Pressure at one end of airway= 40 Cm of H2O
Pressure at other end of airway= 5 Cm of H2O
Change in airway pressure= 40-5= 35 Cm of H2O
Airway resistance = Change in airway pressure / Flow of air
= 35/1.5= 23.3 Cm of H2O / sec
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