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Pleural pressure, or Ppl, is the pressure surrounding the lung, within the pleural space. During quiet breathing, the pleural pressure is negative; that is, it is below atmospheric pressure. The pleura is a thin membrane which invests the lungs and lines the walls of the thoracic cavity.
Another study of 57 patients identified 9 with post-thoracentesis pneumothorax. 58 In those with pneumothorax, the most negative pleural pressure during thoracentesis was −10.8 cm H 2 O in patients with an expandable lung and −17.3 cm H 2 O in those with a nonexpandable lung.
18 Σεπ 2016 · Any theory for pleural pressure needs to explain certain crucial facts, including that the lung and chest walls exert an equal and opposite recoil pressure . It would need to explain the negative values for pleural pressure, and why apical pleural pressure is more negative than at the base.
7 Φεβ 2017 · Elasticity of the lung or elastic recoil as well as the distension of the lung in the pleural cavity are responsible for the so called “negative pressure” in the pleural space. In a healthy lung with normal elastic recoil intrapleural pressure oscillates around 10 mbar.
3 Σεπ 2017 · The negative pleural pressure is critical for maintaining the lungs in a properly inflated state. If the negative pleural pressure is eliminated, the lungs will collapse under their own elastic recoil. This may happen in patients with pneumothorax or large volume pleural effusion.
1 Ιαν 2013 · The negative sign of the pressure gradient, ΔP lymph − net = P lymph − P int, shown in the bottom panel indicates that, in spontaneous breathing, an interstitial-to-lymphatic fluid
Pleural fluid is normally in a constant equilibrium of production and clearance. Pleural effusions most often arise in the setting of increased production and decreased clearance. The most common imaging investigations used in pleural effusions are chest radiographs and CT scans.
