Combined disruption of the thoracic spine and costal arch fracture: An indicator of a severe chest trauma

Background Blunt high-energy trauma increase the risk of associated thoracic and accompanying abdominal organ injuries in chest trauma. A higher overall injury severity has been shown for sternovertebral injuries caused by a flexion-compression mechanism. Literature for a hyperextension-distraction mechanism equivalent to a costal arch fracture combined with a thoracic spinal fracture is sparse. Therefore, we want to show the clinical significance of this entity. Methods A retrospective analysis of our level-one trauma center collective of severely injured patients was performed. Patients from 2013 to 2019 that involved an Injury Severity Score (ISS) ≥16 were screened for the combined thoracovertebral injury entity and analyzed concerning its accident mechanism, the injury spectrum, and the clinical course. Results The thoracovertebral injury entity is rare. Three male patients (50–65 years old) with ISS of 57, 41, and 20 could be observed from over 1000 severely injured. All patients suffered from high-energy trauma and from tearing of the thoracic vertebrae regions 7–9. The costal arch was torn in the anterior area. All cases showed a posterolateral serial rib fracture, a traumatic intercostal pulmonary hernia, and an avulsion of the diaphragm. Two patients sustained further life-threatening injuries, such as severely bleeding avulsion to the azygos vein and a rupture of the spleen. The physicians performed exploratory thoracotomy, closure of the pulmonary hernia, re-fixation of the diaphragm and angle-stable plate osteosynthesis of the fractured ribs, including the costal arch. The spine was fixed dorsally using a screw-rod system. The patients were discharged home with independent mobility and without neurological damage. Conclusions This thoracovertebral injury entity is associated with high overall injury severity and life-threatening thoracoabdominal injuries. Injuries to the costal arch can act as an indicator of severe trauma. They should be detected thorough clinical examination and assessment of the trauma CT in the soft tissue window.