| Modality | Intervention | Frequency |
| Surgical clipping | Ventriculoperitoneal shunt Cranioplasty Decompressive craniectomy Wound debridement Evacuation of EDH Dural repair for CSF leak Trapping of Acom A. (post-operative pseudoaneurysm) Ophthalmological surgery for Terson syndrome | 13 7 3 2 1 1 1 1 |
| Endovascular coiling | Ventriculoperitoneal shunt Ophthalmological surgery for Terson syndrome | 3 1 |