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Table 1 Grading system for blunt cerebrovascular injuries

From: State of the art: noninvasive imaging and management of neurovascular trauma

Grade Injury pattern
I Intimal injury, luminal narrowing <25%
II Visualized dissection flap, or luminal narrowing >25%
III Pseudoaneurysm
IV Vessel occlusion
V Vessel transection
  1. Adapted from Reference 28.