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Keywords:
Neuroradiology brain, Interventional vascular, CT-Angiography, Catheter arteriography, Arterial access, Embolisation, Aneurysms
Authors:
A. Navichenka, A. Beimanov, P. Konovalov, B. Piskun, A. Gontchar; Minsk/BY
DOI:
10.1594/ecr2016/B-0800
Methods and materials
Retrospective analysis of diagnostic results pre- and completely postembolized ruptured cerebral saccular aneurysms,
obtained from 28 patients both sexes, was performed.
There were 9 (32,1%) male patients with mean age 56,1±12,3 years and 19 (67,9%) female 53,7±13 years old.
Mean age - 54,5±12,5 years.
Distribution of aneurysms by localisation presented on Fig. 1 .
Most common sites of aneurysms were anterior and medial cerebral arteries – in 39,3% and 28,6% correspondingly.
By size we divided all aneurysm on small aneurysms (<5 mm),
medium aneurysms (5< X<15 mm),
large aneurysms (15<X<25 mm) [5,
6].
In our study there were 67,9% small aneurysms and 32,1% medium aneurysms.
For embolization we used both bare metal coils and coils with hydrogel polymer coating.
Coils volume was estimated by AngioCalc program [9].
Aneurysmal linear parameters – maximal length (H),
width (D),
height and neck diameter (N) were measured both on computer tomography scans and digital subtractional angiography images before and after embolization ( Fig. 2 ).
Aneurysm volume was estimated as a mean mathematically calculated by the formula Volume=4/3*π*1/2length*1/2width*1/2height ( Fig. 3 ) and automatically presented by specific software at angiography complex or computer tomograph workstations [5,
12,
13].
Embolisation percentage dependence from aneurysm size,
angle between aneurysm long axis and parent vessel and diameters of afferent/efferent vessel were estimated.
Normal probability plots of all data were assessed using Kolmogorov-Smirnov and Lillieforce tests.
Groups with normal distribution were compared using T-test,
non-parametric data was compared using the Mann-Whitney test.
The significance level was 0,05.