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Pleural fluid analysis is a test that examines a sample of fluid that has collected in the pleural space. This is the space between the lining of the outside of the lungs (pleura) and the wall of the chest. When fluid collects in the pleural space, the condition is called pleural effusion.
Finally, the most common type of pleural disease is pleural effusion. This condition is characterized by an abnormal accumulation of fluid in the pleural cavity. When the pleural lining is scarred by disease or asbestos exposure it can allow the buildup of fluid in the space between the chest wall and the lungs.There are two main types of pleural effusions â transudative and exudative. Transudative effusions are caused by a problem with the normal pressure level in the lung.his condition is characterized by an abnormal accumulation of fluid in the pleural cavity. When the pleural lining is scarred by disease or asbestos exposure it can allow the buildup of fluid in the space between the chest wall and the lungs.