Technical problems encountered during procedure and causes of procedure failure
| Patient sequence | Stenosis location | Stenosis degree | Technical problem encountered during the procedure | Cause of procedure failure |
|---|---|---|---|---|
| 4 | ICA and MCA | 50% | Difficult stent tracking and delivery, fracture core of stent delivery system | |
| 5 | ICA | 60% | Nose cone bending caused stent sheath kinking and stretching during stent deployment | |
| 7 | ICA | 60% | Stretching of stent sheath during stent deployment | |
| 8 | BA | 75% | Arterial rupture after angioplasty | |
| 15 | ICA and MCA | 50% | TIA during manipulation of balloon catheter across stenosis | TIA |
| 27 | ICA | 90% | Nose cone trapped between guidewire and stent tip after stent deployment | |
| 42 | ICA | 75% | Difficult stent tracking and delivery, fracture core of stent delivery system, TIA | TIA |
| 44 | MCA | 83% | TIA | |
| 47 | ICA and MCA | 96% | Failure passage of balloon across stenosis | Failure passage of balloon |
| 48 | MCA | 90% | Kinking of balloon catheter after guidewire removal | |
| 56 | MCA | 70% | Transient blindness and severe headache during stent system advancement | |
| 59 | MCA | 87% | Transient blindness during stent system advancement | TIA |
| 66 | ICA | 75% | Perforation of M2 perforators by guidewire during angioplasty |
BA, basilar artery; ICA, internal carotid artery; MCA, middle cerebral artery; TIA, transient ischemic attack.