Sudden Asphyxia Caused by Retropharyngeal Hematoma after Blunt Thyrocervical Artery Injury

Abstract

BackgroundRetropharyngeal hematomas are often associated with blunt cervical spine injury. Generally, they improve with conservative treatment; however, rarely, airway obstruction occurs due to delayed swelling of retropharyngeal hematoma. ObjectivesTo report a case of sudden asphyxia due to retropharyngeal hematoma caused by blunt thyrocervical artery injury. Case ReportA 30-year-old woman was admitted to the Emergency Department of Tokai University Hospital 4h after injury in a motor vehicle collision. On arrival, she had severe dyspnea and neck swelling; thereafter, a 26-mm-thick retropharyngeal swelling was visualized on lateral cervical plain X-ray study, extending from C1 anterior vertebrae to mediastinum. Emergency intubation was performed for the asphyxia. Because extravasation of contrast agent was observed in the hematoma on emergency contrast-enhanced computed tomography (CT) scan, emergency angiography was performed, from which we diagnosed a hemorrhage from the right thyrocervical artery. ConclusionIf a patient with a non-displaced cervical spine injury suffers airway obstruction due to retropharyngeal hematoma, vigorous hemorrhage from a thyrocervical artery injury should be considered as the cause, and emergency contrast-enhanced CT scan of the neck should be performed after emergent tracheal intubation.