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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.
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.
The relationship between the intra-pulmonary pressure and intra-pleural pressure is that the pressure becomes more negative during inspiration and allows air to get sucked in (Boyle's law) P vs V relationship and during expiration, the pressure becomes less negative (Note: still less than atmospheric pressure, also take note of the partial press...
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.
This condition creates excessively negative pressure in the pleural space as the chest wall moves outward during inspiration; during inspiration, the trapped lung resists deformation. Thus, for any given expansion of the chest wall and lung during inspiration, the pleural pressure is more negative.
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.
1 Μαΐ 2020 · Pleural manometry (PM) is a novel tool that allows direct measurement of the pressure in the pleural space in the presence of either a pleural effusion or a pneumothorax. Originally it was...
