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Intrapleural pressure depends on the ventilation phase, atmospheric pressure, and the volume of the intrapleural cavity. [2] At rest, there is a negative intrapleural pressure. This provides a transpulmonary pressure, causing the lungs to expand.
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.
23 Αυγ 2021 · Intrapleural pressure is the pressure in the space between the visceral and parietal pleura, or (physiologically) between the lungs and the chest wall. Usually negative, typically -5cmH2O at rest. Balance between the: Outwards recoil of the chest wall. Inwards recoil of the lungs (Pel) Varies with vertical distance in the lung.
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.
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.
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.
21 Φεβ 2018 · One theory maintains that the pleura serves as an elastic serous membrane to allow changes in lung shape with respiration, whereas others suggest that the slightly negative pleural pressure...
