[RS]Q.6 Compliance of the Lungs:

 Ans.

The extent to which the lungs will expand for each unit increase in transpulmonary pressure is called lung compliance.

It is about 200 ml of air/cm of H2O transpulmonary pressure. That is, every time the trauspulmonary pressure increase 1cm of H2O, the lung volume will expand 200 ml.

Importance:

·  In restrictive lung disease, lung compliance reduced.

·  In obstructive lung disease, lung compliance Increased.