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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.
27 Σεπ 2019 · In summary: Pleural pressure is usually negative, due to: Recoil of the chest wall. Recoil of the lungs. Negative pressure exerted by the lymphatic system. In the upright subject, it is more negative in the apices, and less negative in the bases.
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]
9 Ιαν 2023 · The direct measurement of pleural pressures during thoracentesis is known as pleural manometry. The indications, technique, and interpretation of pleural pressures during pleural fluid manometry will be reviewed here.
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.
Additionally, the negative intrapleural pressure relative to atmospheric pressure results in a positive transpulmonary pressure preventing atelectasis at end-exhalation and allowing the lung to inflate during inspiration.
28 Αυγ 2023 · Hemothorax - a buildup of blood in the pleural space; commonly from injury or trauma to the chest. In adults, congestive heart failure and liver cirrhosis are the most common causes of transudative pleural effusions.
