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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.
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.
18 Σεπ 2016 · Once the pleural space fills completely with fluid, the pleural pressure becomes more negative as the pleural space becomes non-confluent, similar to the normal circumstances at the lobar edge where the pleural pressure gradient is higher.
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.
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.
21 Φεβ 2018 · This balance of physical forces keeps the pressure in the pleural space slightly negative, at approximately −3 to −5 cm of water. 2,3 The physiological function of the pleural space in...
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.
