Fig. 1. Computed tomography aspect demonstrating the intrapleural position of a chest tube. On axial computed tomography sections, the chest tube is visualized from its entry in the left hemithorax ( image 4 ) to its extremity ( image 1 ), via its intrapleural route ( images 2 and 3 ). Frontal reconstructions confirm the intrapleural position of the chest tube: Plane A shows both the entry ( gray arrow ) of the chest tube and its distal tip ( black arrow ), and plane B shows the ascending and lateral intrapleural route of the chest tube.