In: Anatomy and Physiology
Could someone please explain the consequences of low lung compliance. Thank you
Lung Compliance is the magnitude of the lung volume change generated by a presented change in transpulmonary pressure.
The transpulmonary pressure is higher than normal when lung compliance is low to generate a given amount of lung expansion.
There is a comparatively little difference in lung volume for a given change in Pressure (dV/dP) in the case of low lung compliance. Lesser the lung compliance more is the energy required to produce lung expansion.
People suffering from low lung compliance breathe shallowly and at a higher frequency.
Compliance is inversely proportional to the lung elastic recoil. The lungs are stiff and have a higher than normal level of elastic recoil when the compliance is low.
A stiff lung requires higher than the average change in pleural pressure to alter the lungs volume resulting in difficulty in breathing.
For example- A person with pulmonary fibrosis has low lung compliance.