Vertebral Artery Injuries in Patients with Blunt Cervical Spine Injury : Table 1

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