Patient and aneurysm characteristics
| No. of patients | 100 |
| Sex | |
| Female | 66 |
| Male | 34 |
| Age | |
| Mean | 53.6 y |
| Minimum | 11 d |
| Maximum | 86 y |
| No. of treated aneurysms | 104 |
| Unruptured aneurysms (%) | 56 (54) |
| Incidental | 41 (39) |
| Mass effect | 6 (6) |
| Previous SAH | 8 (8) |
| Seizure | 1 (1) |
| Ruptured aneurysms (%) | 48 (46) |
| Hunt and Hess grade (%) | |
| I | 16 (15) |
| II | 5 (5) |
| III | 12 (12) |
| IV | 14 (13) |
| V | 1 (1) |
| Aneurysm location (%) | |
| Anterior | 78 (75) |
| Cavernous | 0 (0) |
| Ophthalmic | 9 (9) |
| Paraophthalmic | 11 (11) |
| PcomA | 28 (27) |
| AchoA | 1 (1) |
| ICA bifurcation | 5 (5) |
| ACA | 1 (1) |
| AcomA | 14 (13) |
| MCA | 9 (9) |
| Posterior | 26 (25) |
| VB junction | 1 (1) |
| PICA | 0 (0) |
| Basilar trunk | 3 (3) |
| SCA | 2 (2) |
| Basilar tip | 16 (15) |
| PCA | 4 (4) |
| Aneurysm size (%) | |
| S/S | 42 (40) |
| S/W | 27 (26) |
| Large | 32 (32) |
| Giant | 3 (3) |
| HydroCoil length | |
| Range | 9.9%–100% |
| Average | 45.5% |
Note:—SAH indicates subarachnoid hemorrhage; PcomA, posterior communicating artery; AchoA, anterior choroidal artery; ICA, internal carotid artery; ACA, anterior cerebral artery; AcomA, anterior communicating artery; MCA, middle cerebral artery; VB, vertebrobasilar; PICA, posterior inferior cerebral artery; SCA, superior cerebral artery; PCA, posterior cerebral artery; SIS, small size (<10 mm)/narrow-necked (<4 mm); S/W, small size/wide-necked (>4 mm); Large, >10–25 mm; Giant, >25 mm.