Type III laceration of lung parenchyma according to Wagner's classification is diagnosed by chest CT [3, 6]. This lesion appears as a pneumatocele located near the lung surface, and usually has fractured ribs beside it. An air–fluid level could sometimes be seen in the lesion. In addition to these findings, subcutaneous emphysema, haemothorax and pneumothorax could also be found together. Lung contusions are also diagnosed by chest CT simultaneously, and the pulmonary contusion score would be calculated and recorded [12]. All these lung lacerations were confirmed by attending radiological physicians in our hospital. Two conditions signify massive bleeding in chest trauma. One is a haemothorax of >1500 ml initially drained from a tube thoracostomy. The other is the rate of bleeding >250 ml/h and lasting at least 4 h. For both these conditions exploratory thoracotomy is indicated to check bleeding sites, which were excluded from this study.