Pleural Effusion Facts
Pleural Effusion Overview
A pleural effusion is a collection of fluid in the space between the two linings (pleura) of the lung.
When we breathe, it is like a bellows. We inhale air into our lungs and the ribs move out and the diaphragm moves down. For the lung to expand, its lining has to slide along with the chest wall movement. For this to happen, both the lungs and the ribs are covered with a slippery lining called the pleura. A small amount of fluid acts as a lubricant for these two surfaces to slide easily against each other.
Too much fluid impairs the ability of the lung to expand and move.
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