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A patient's airway pressure is being measured while he is breathing into a spirometer. Which of the following lung volumes would be associated with an airway pressure of +30 cm H2O?




d)Tidal volume

e)Minimal volume




Yes...its b




Any volume ABOVE FRC will create a POSITIVE airway pressure.

Any volume BELOW FRC will create a NEGATIVE airway pressure.

To measure airway pressure thru a spirometer, you can inhale to TLC & relax, you will feel the sensation of wanting to blow air out-- this creates a POSITIVE pressure in your airway.


tht's a really good explanation KEROCHI, always hv confusd me thnx a lot!


really nice explanation..thnx alot. kerochi...wink


you're welcome! A HY q by the way SDK!

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