ntended Use:Chest drainage catheter used when a patient has a pneumothorax or hemothorax, which is air or blood in the pleural space (the space between the lung and the chest wall). This condition does not allow the lung to inflate, which can be fatal if not treated. In a situation like this, a chest tube is inserted to provide drainage from the pleural space. It is designed to minimize bruising to the pleura and the chest wall during insertion.