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Old 10-05-2012
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Lungs Measured Pulmonary Pressure!

UW Q 4713

A 32 year man is intubated and mechanically ventilated after an opioid drug overdose. The ventilator triggers 12 breaths per minute each delivering 500 ml of tidal volume at a flow rate of 6 L/min. You perform an inspiratory hold for 2 seconds following delivery of the tidal volume, and the airway pressure is measured to be 30 cm H2O.

Measured Pulmonary Pressure!-pulmonary-pressure-graph.jpg
click image to enlarge

The measured pressure reflects which of the following ?

A. Upper airway resistance
B. Total airway resistance
C. Pulmonary compliance
D. Expiratory muscle strenght
E. End-expiratory pressure

Please explain this Question .Thank you
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Its C, lung compliance is the reverse of elasticity, in other words, that the lung remains open and doesnt collapse and returns to its original position, thats why in the graph it stays the same.. also because the end respiratory maneuver measures specifically this principle as well.
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This question was discussed here
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