Effect of the Shelving Technique on the Outcome of Embolization in Intracranial Bifurcation Aneurysms

Article Figures & Data

Table 1:

Aneurysm locations

Location	Group A (%)	Group B (%)	Total No. (%)
AcomA	9 (25)	11 (36.7)	20 (30.3)
Basilar tip	1 (2.8)		1 (1.5)
Distal ACA	1 (2.8)	1 (3.3)	2 (3)
MCA bifurcation	25 (69.4)	14 (46.7)	39 (59.1)
SCA		2 (6.7)	2 (3)
Terminal ICA		2 (6.7)	2 (3)
	36 (100)	30 (100)	66 (100)

Table 2:

Univariate analysis of the patient and aneurysm characteristics between the 2 groups

	Group A	Group B	P Value
Total No. (%)	36 (100)	30 (100)
Female sex (No.) (%)	20 (55.6)	15 (50)	.65
Age (mean) (years)	58.89 (SD, 10.95)	52.43 (SD, 13.14)	.03
Aneurysm size (mean) (mm)	7.95 (SD, 2.88)	6.29 (SD, 2.90)	.02
Neck width (mean) (mm)	4.68 (SD, 1.67)	3.91 (SD, 1.39)	.04
Proximal diameter of the stented artery (mean) (mm)	2.64 (SD, 0.37)	2.50 (SD, 0.37)	.13
Distal diameter of the stented artery (mean) (mm)	2.04 (SD, 0.50)	1.89 (SD, 0.40)	.18
Follow-up duration (mean) (mo)	28.28 (SD, 17.47)	26.13 (SD, 17.65)	.62
Bifurcation angle (mean) (IQR)	92.50° (SD, 25.23°) (43.38°)	92.75° (SD, 34.84°) (65.40°)	.97
Platelet inhibition (%) (mean)^{^a}	79.03 (SD, 17.65)	81.39 (SD, 16.27)	.58
Complications (in-stent restenosis or stroke) (No.) (%)	3 (8.3)	4 (13.3)	.69
Incorporation of the origins of at least 1 of the side branches to the aneurysm neck (No.) (%)	23 (63.9)	19 (63.3)	.96
Incorporation of the origins of both side branches to the aneurysm neck (No.) (%)	12 (33.3)	5 (16.7)	.12
Progressive occlusion (No.) (%)	8 (22.2)	5 (16.7)	.57

Table 3:

The aneurysm occlusion status during the follow-up^{^a}

↵a Aneurysm occlusion is classified according to the Raymond Roy (RR) scale.
↵b The patient was re-treated after 3 months with complete obliteration, so the patient was not included in further angiographic analyses but was included in the final follow-up as a having a residual aneurysm case.

Table 4:

Univariate analysis of the predictors for total occlusion on the final imaging follow-up

	Total Occlusion (RR I)	Non-Total Occlusion (RR II and RR III)	P Value
Total (No.) (%)	59 (100)	7 (100)
Female sex (No.) (%)	30 (50.8)	5 (71.4)	.43
Age (mean) (yr)	56.76 (SD, 12.06)	49.14 (SD, 13.42)	.20
Aneurysm size (mean) (mm)	7.07 (SD, 3.02)	8.21 (SD, 2.64)	.26
Neck width (mean) (mm)	4.22 (SD, 1.56)	5.28 (SD, 1.54)	.08
Proximal diameter of the stented artery (mean) (mm)	2.55 (SD, 0.37)	2.77 (SD, 0.39)	.23
Distal diameter of the stented artery (mean) (mm)	1.94 (SD, 0.46)	2.21 (SD, 0.39)	.11
Follow-up duration (mean) (mo)	27.42 (SD, 18.14)	26.29 (SD, 10.79)	.89
Complications (in-stent restenosis or stroke) (No.) (%)	7 (11.9)	0	1
Incorporation of the origins of at least 1 of the side branches to the aneurysm neck (No.) (%)	36 (61)	6 (85.7)	.40
Incorporation of the origins of both side branches to the aneurysm neck (No.) (%)	16 (27.1)	1 (14.3)	.66
Stent bulging (No.) (%)	31 (52.5)	5 (71.4)	.44
Bifurcation angle (mean)	92.38° (SD, 30.06°)	94.54° (SD, 29.08°)	.85
Platelet inhibition (%) (mean)^{^a}	80.66 (SD, 17.66)	75.43 (SD, 9.14)	.36