Table 1: Blunt cerebrovascular Injuries grading scale.
Injury grade Description
I Luminal irregularity of dissection with < 25% luminal narrowing
II Dissection or intramural hematoma with ≥ 25% luminal narrowing, intraluminal thrombus, or raised intimal flap
III Pseudoaneurysm
IV Occlusion
V Transection with free extravasation