Intra-arterial therapy (IAT) decision-making
| Question | No of responses (N=140)* |
|---|---|
| Which team(s) make IAT decision? | |
| Primarily acute stroke team | 14 (10.0%) |
| Primarily INR team | 22 (15.7%) |
| Both teams | 104 (74.3%) |
| What is the minimum NIHSS required for IAT consideration? (n=139) | |
| ≤4 | 5 (3.6%) |
| 5–6 | 11 (7.9%) |
| 7–8 | 23 (16.5%) |
| 9–10 | 14 (10.1%) |
| >10 | 2 (1.4%) |
| No minimum score | 84 (60.4%) |
| What imaging studies are performed? | |
| CT only | 77 (55.0%) |
| MRI only | 8 (5.7%) |
| Both available | 51 (36.4%) |
| Not specified | 4 (2.9%) |
| Perfusion with any of the above | 104 (74.3%) |
| What is time window for IAT consideration in anterior circulation? | |
| <6 h from LSN | 29 (20.7%) |
| <8 h from LSN | 49 (35.0%) |
| <12 h from LSN | 2 (1.4%) |
| <24 h from LSN | 2 (1.4%) |
| Variable for each case based on clinical, imaging findings | 58 (41.4%) |
| What is time window for IAT consideration in posterior circulation? | |
| <6 h from LSN | 4 (2.9%) |
| <8 h from LSN | 2 (1.4%) |
| <12 h from LSN | 9 (6.4%) |
| <24 h from LSN | 43 (30.7%) |
| <48 h from LSN | 4 (2.9%) |
| Variable for each case based on clinical, imaging findings | 78 (55.7%) |
| Is infarct size on CT or DWI used to exclude patients from IAT? | |
| Yes | 60 (42.9%) |
| <70 ml | 3 (2.1%) |
| 70–100 ml | 28 (20.0%) |
| One-third MCA territory or greater | 14 (10.0%) |
| Not specified | 15 (10.7%) |
| No | 80 (57.1%) |
| Is ASPECTS score utilized to exclude patients from IAT? | |
| Yes | 29 (20.7%) |
| ≤4 | 3 (2.1%) |
| 5 | 4 (2.9%) |
| 6 | 9 (6.4%) |
| 7 | 11 (7.9%) |
| 8 | 1 (0.7%) |
| Not specified | 1 (0.7%) |
| No | 111 (79.3%) |
*Unless otherwise indicated.
ASPECTS, Alberta Stroke Program Early CT Score; INR, interventional neuroradiology; LSN, last seen normal; LVO, large vessel occlusion.