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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.
In physiology, intrapleural pressure refers to the pressure within the pleural cavity. Normally, the pressure within the pleural cavity is slightly less than the atmospheric pressure, which is known as negative pressure. [1]
28 Αυγ 2023 · The pressure of the pleural fluid is subatmospheric and maintains the negative pressure between the lungs and thoracic cavity, which is necessary for inhalation while also preventing the lungs from collapsing.
The force exerted by gases within the alveoli is called intra-alveolar (intrapulmonary) pressure, whereas the force exerted by gases in the pleural cavity is called intrapleural pressure. Typically, intrapleural pressure is lower, or negative to, intra-alveolar pressure.
24 Ιουλ 2023 · The pleural cavity always maintains a negative pressure. During inspiration, its volume expands, and the intrapleural pressure drops. This pressure drop decreases the intrapulmonary pressure as well, expanding the lungs and pulling more air into them.
18 Μαρ 2023 · When excess fluid accumulates between the pleural membranes, various procedures may be used to either drain the fluid or eliminate the space between them. This article outlines what the pleurae are, what they do, and what conditions can affect them and impact respiratory health.
24 Φεβ 2023 · Intrapleural pressure is the pressure of the air within the pleural cavity, between the visceral and parietal pleurae. Similar to intra-alveolar pressure, intrapleural pressure also changes during the different phases of breathing.
