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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.
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.
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]
3 Σεπ 2017 · Air accumulation in the pleural space that is termed pneumothorax is invariably associated with an increase in pleural pressure which results in partial or complete lung collapse and increase in size of the hemithorax. The negative pleural pressure can also promote accumulation of pleural fluid.
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 used to guide therapy for tuberculosis (TB) before the development of anti-TB medications.
Excessively negative pleural pressure compared to the normal state is present during both inhalation and exhalation, and shifts the balance of Starling forces that are responsible for the production of pleural fluid such that more fluid moves into the pleural space.
29 Ιουλ 2021 · Typical pattern of pleural pressure (P pl) decline during pleural fluid withdrawal in a patient with normal lung mechanics (A); lung entrapment (B), and trapped lung (C).
