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.
What is Pleural Thickening. Diffuse pleural thickening is one of two non-malignant diseases which affect the pleura of the lung. The other non-malignant pleural disease is pleural plaques. Diffuse pleural thickening refers to widespread pleural thickening and usually affects the visceral pleura.