Endovascular Coil Embolization of 435 Small Asymptomatic Unruptured Intracranial Aneurysms: Procedural Morbidity and Patient Outcome

Article Figures & Data

Table 1:

Characteristics of the patient population

Table 2:

Supporting techniques for aneurysm coiling

Adjuvant Technique	No. of Aneurysms
Total	200 (46.0%, 200/435)
Balloon remodeling	109 (25.1%, 109/435)
Stent-assisted	19 (4.37%, 19/435)
Multiple-catheter	77 (17.7%, 77/435)
2-Catheter	67 (15.4%, 67/435)
3-Catheter	8 (1.84%, 8/435)
Microcatheter-assisted	2 (0.46%, 2/435)
Combination (balloon remodeling, 2-catheter)	5 (1.15%, 5/435)

Table 3:

Aneurysm location and size

Location	No. of Aneurysms (%)	Aneurysm Size (mean)
Anterior circulation	390 (89.7)	4.52
ICA-ophthalmic	10 (2.3)	4.76
ICA bifurcation	12 (2.3)	4.52
Cavernous ICA	16 (3.68)	4.89
ICA-anterior choroidal artery	18 (4.14)	4.39
ICA-superior hypophyseal artery	55 (12.6)	3.93
ICA-other locations	120 (27.6)	4.47
ACA	18 (4.14)	4.81
Posterior communicating artery	38 (8.74)	4.53
MCA	46 (10.6)	4.37
Anterior communicating artery	57 (13.1)	4.88
Posterior circulation	45 (10.3)	4.22
Anterior inferior cerebellar artery	2 (0.46)	3.67
Posterior inferior cerebellar artery	2 (0.46)	4.19
Basilar trunk	2 (0.46)	2.22
Vertebral artery	4 (0.92)	5.81
Posterior cerebral artery	5 (1.15)	3.37
Superior cerebellar artery	10 (2.3)	3.40
Basilar tip	20 (4.60)	4.78

Note:—ICA indicates internal carotid artery; ACA, anterior cerebral artery; MCA, middle cerebral artery.

Table 4:

Procedure-related complications

Complications	No. of Cases
Total	44 (10.1%, 44/435)
Thromboembolism	24 (5.52%, 24/435)
Asymptomatic	21 (4.83%, 21/435)
Symptomatic	3 (0.69%, 3/435)
Transient neurologic deficit	2 (0.46%, 2/435)
Permanent neurologic deficit	1 (0.23%, 1/435)
Coil protrusion or prolapse	11 (2.53%, 11/435)
No flow compromise	8 (1.84%, 8/435)
Flow compromise	3 (0.69%, 3/435)
Intraprocedural ruptures	4 (0.92%, 4/435)
Slow leak	3 (0.69%, 3/435)
Massive hemorrhage	1 (0.23%, 1/435)
Device-related	3 (0.69%, 3/435)
HydroCoil-associated chemical meningitis	2 (0.46%, 2/435)
Coil fracture	1 (0.23%, 1/435)
Femoral access complications	2 (0.46%, 2/435)
Femoral arteriovenous fistula	1 (0.23%, 1/435)
External iliac artery dissection	1 (0.23%, 1/435)