Figure 4: The strategy to re-expand the lung after lung resection surgery. A:forcing the remaining lung against the chest wall after lung resection surgery, obviously implies deformation and over-distension. To avoid this, an air bubble has to remain in the thorax and the pressure in the bubble should be equal to the pre-operative pleural pressure. B:pleural pressure can only be assessed by determining the volume-pressure curve of the lung before operation. The figure highlights the differences in pleural pressure according to the condition of the lung (lung recoil pressure, indicated by the different colors).