Table 1.
Intraoperative parameters; mRS = modified Rankin Scale, pnND = permanent new neurological deficit, GOS = Glasgow outcome scale, tnND = transient new neurological deficit, mRS-Diff > 1 = mRS difference > 1 (preoperative vs. postoperative).
| Intraoperative parameters | Total | mRS > 2 | pnND | GOS < 5 | tnND | mRS-Diff > 1 | Train Set | Test Set |
|---|---|---|---|---|---|---|---|---|
| Number of Aneurysms | 466 | 59 | 29 | 63 | 35 | 48 | 380 | 86 |
| Mean operating duration in minutes (± SD) | 250 (± 109) | 263 (± 107) | 261 (± 108) | 291 (± 114) | 284 (± 117) | 278 (± 115) | 226 (± 93) | 357 (± 110) |
| Blood transfusion | 4 (0.9%) | 2 (3.4%) | 0 | 3 (4.8%) | 1 (2.9%) | 1 (2.1%) | 4 (1.1%) | 0 |
| Use of more than 1 clip | 163 (35.1%) | 24 (40.7%) | 11 (37.9%) | 25 (40.3%) | 12 (35.3%) | 20 (42.6%) | 134 (35.3%) | 29 (34.1%) |
| Simultaneous clipping of multiple aneurysms | 81 (17.4%) | 16 (27.1%) | 12 (41.4%) | 17 (27.0%) | 7 (20.0%) | 13 (27.1%) | 61 (16.1%) | 20 (23.3%) |
| Simultaneous bypass | 2 (0.4%) | 1 (1.7%) | 1 (3.6%) | 2 (3.2%) | 1 (2.9%) | 1 (2.1%) | 0 | 2 (2.4%) |
| Temporary vessel occlusion | 51 (11.1%) | 11 (18.6%) | 4 (14.3%) | 11 (18.0%) | 5 (14.3%) | 9 (18.8%) | 46 (12.2%) | 5 (5.9%) |
| Repositioning of initial clip | 88 (19.1%) | 14 (23.7%) | 8 (28.6%) | 17 (27.9%) | 9 (25.7%) | 10 (20.8%) | 83 (22.1%) | 5 (5.9%) |
| Intraoperative rupture | 16 (3.5%) | 6 (10.2%) | 6 (21.4%) | 7 (11.3%) | 2 (5.7%) | 6 (12.5%) | 14 (3.7%) | 2 (2.4%) |
| Wrapping | 14 (3.0%) | 0 | 0 | 0 | 0 | 0 | 11 (2.9%) | 3 (3.5%) |