20. Blunt Carotid & Vertebral Vascular Injuries (BCVI) Early recognition and treatment of blunt carotid and vertebral vascular injuries may reduce the risk of stroke. Suggested criteria for screening include: C1–3 fracture C -spine fracture with subluxation Fractures involving the foramuntransversarium Approximately 1/3 of these patients will have BCVI when imaged with CT angiography of the neck