Pertinent characteristics of patients for whom TRA failed
| Case number | Location | Vessel | PED size (mm) | Catheter system | Failure reason |
| JMH 6 | PComA | LICA | n/a* | 071 Envoy DA | LCCA angle of origin |
| JMH 7 | Ophthalmic | LICA | 4.75×14 | 071 Envoy DA | LCCA/ICA tortuosity |
| JMH 12 | ICA | LICA | 4.5×15 | n/a | Radial artery spasm |
| JMH 17 | Ophthalmic | RICA | 4.5×16 | n/a | Radial artery spasm |
| JMH 19 | PComA | LICA | 4.75×14 | 088 Infinity/060 Syphontrak/027 Phenom | LICA tortuosity |
| WUSTL 5 | Ophthalmic | LICA | 3.75×12 | 071 Envoy DA | LCCA angle of origin |
| WUSTL 11 | PComA/AChA | LICA | 4.5×16 | 071 Envoy DA | LCCA angle of origin |
| WUSTL 15 | Paraclinoid ICA | LICA | 5.0×16 | 088 Infinity/058 Navien/027 Phenom | LICA tortuosity |
| WUSTL 16 | SHA | LICA | n/a* | 088 Infinity/058 Navien/027 Phenom | LICA tortuosity |
| WUSTL 20 | Ophthalmic | LICA | 4.0×14 | 071 Envoy DA | LCCA angle of origin |
*Flow diverting stent placement aborted.
AChA, anterior choroidal artery; ICA, internal carotid artery; LCCA, left common carotid artery; LICA, left internal carotid artery; PComA, posterior communicating artery; PED, Pipeline embolization device; RICA, right internal carotid artery; SHA, superior hypophyseal artery; TRA, transradial approach.