Pleural shock

The lungs collapse under compression, and the degree of collapse depends on lung compliance and the presence or absence of adhesions in the pleura. The normal pleural cavity has a negative pressure, which is lower than the pleural cavity on the diseased side, causing the mediastinum to shift. At the same time, the pressure on the healthy side of the chest can still increase and decrease with the breathing cycle, which causes mediastinal swing and residual air convection, resulting in severe ventilation and ventilation dysfunction. Mediastinal swings cause large back and forth distortions of the heart's blood vessels and negative pressure in the thorax, impeding venous blood flow and reducing cardiac output. Mediastinal swing can stimulate the mediastinum and hilar plexus, causing or exacerbating shock. The medical community calls it pleural lung shock.