Complications due to sofia and SNAKE
| Complications | Sofia (All) | Sofia (5-Fr) | Sofia (6-Fr) | SNAKE (−) | SNAKE (+) |
| Vessel dissection | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
| Internal carotid vasospasm | 1 (0.3%) | 0 (0%) | 1 (100%) | 0 (0%) | 1 (0.5%) |
| Vertebral or basilar vasospasm | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
| External carotid vasospasm | 4 (1%) | 4 (1.8%) | 0 (0%) | 1 (0.8%) | 3 (1.6%) |