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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 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.
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.
Pleural manometry showed decreasing pressure with the volume of removed pleural fluid, but the excessively negative pressure was not recorded in any patients who developed pneumothorax (the lowest pressure after pleural fluid withdrawal was −19.5 cmH 2 O).
29 Ιουλ 2021 · A unique feature of the pleural cavity is the negative, sub-atmospheric, pressure within this space, ranging between −3 and −5 cmH 2 O at functional residual capacity (FRC) and −6 to −10 cmH 2 O during the inspiratory phase of quiet breathing [1•, 2].
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.
A unique feature of the pleural cavity is the negative, sub-atmospheric, pressure within this space, ranging between −3 and 5 cmH2O −. This article is part of the Topical Collection on Pleural Diseases and Mesothelioma. Rafal Krenke rafalkrenke@interia.pl.
