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Table 3: Main series of TRA for intracranial aneurysm treatment
Snelling et al¹⁴ Chen et al¹⁵ Goland et al¹⁶ Chivot et al
n 33 49 40 64
Type of treatment 
    Flow diverter 11 49 5 2
    Coils 12 0 35 34
    Balloon-assisted coiling 3 0 0 22
    Stent-assisted coiling 6 0 0 6
    Vessel sacrifice 1 0 0 0
Permanent neurologic complications 0 0 0 0
Crossover 15.1% (5/33) 20.40% (10/49) 0 3.1% (2/64)
Failure reasons 
    Radial artery spasm 2 2 0 0
    LICA tortuosity 0 4 0 0
    LCCA origin angle 2 4 0 1
    Subclavian tortuosity 1 0 0 0
    Subclavian occlusion 0 0 0 1
Note:—LICA indicates left internal carotid artery; LCCA, left common carotid artery.

	Snelling et al¹⁴	Chen et al¹⁵	Goland et al¹⁶	Chivot et al
n	33	49	40	64
Type of treatment
Flow diverter	11	49	5	2
Coils	12	0	35	34
Balloon-assisted coiling	3	0	0	22
Stent-assisted coiling	6	0	0	6
Vessel sacrifice	1	0	0	0
Permanent neurologic complications	0	0	0	0
Crossover	15.1% (5/33)	20.40% (10/49)	0	3.1% (2/64)
Failure reasons
Radial artery spasm	2	2	0	0
LICA tortuosity	0	4	0	0
LCCA origin angle	2	4	0	1
Subclavian tortuosity	1	0	0	0
Subclavian occlusion	0	0	0	1