The pressure is computed assuming an International standard sea-level pressure datum of 1013.25 hPa, and therefore is not necessarily the same as the aircraft's true altitude either above mean sea level or above ground level.he pressure is computed assuming an International standard sea-level pressure datum of 1013.25 hPa, and therefore is not necessarily the same as the aircraft's true altitude either above mean sea level or above ground level.
The term pleurisy (pleuritis) is inflammation or infection in the pleural space around the lungs. Pyothorax also known as empyema of the pleural cavity is the presence of pus in the pleural cavity between the layers of the pleural membrane Py/o-Pus.
Pleural thickening definition. Pleural thickening is a lung disease that describes a scarring, calcification, and/or thickening of the pleura (the lining surrounding the lungs) often as a consequence of the inhalation of asbestos into the lungs.f the asbestos fibres work their way into the pleura, they can cause the pleural thickening condition. Pleural thickening tends to cause sufferers a tightness of the chest or breathlessness which is attributed to the reduced lung function that the thickening causes.