“…In 1999, Biffl et al 3 reported a grading scale for blunt carotid arterial injury, distinguishing 5 injury grades: grade I, "luminal irregularity or dissection with < 25% luminal narrowing"; grade II, dissection or intramural hematoma with ≥ 25% luminal narrowing, intraluminal thrombus, or raised intimal flap"; grade III, pseudoaneurysm; grade IV, occlusion; and grade V, "transection with free extravasation." Bodanapally et al, 4 in their 2015 article on arterial injuries after penetrating brain injury, described 4 types of intracranial arterial injury: traumatic intracranial aneurysm, dissection, occlusion, and carotidcavernous fistulas. In this current study, we stratified the types of TCVI into 4 groups: stenosis/occlusion, pseudoaneurysm, AVF, and transection.…”