The Volume Embolization Ratio of Intraaneurysmal Embolization Using Guglielmi Detachable Coils.

AIM To analyse the relationship between the Volume Embolization Ratio (VER), aneurysmal morphological characteristics, and intracranial aneurysm embolization results. MATERIAL AND METHODS Using the clinical and radiological data of 57 cerebral aneurysms treated with detachable coils, VERs were calculated. The relationship between the VER and aneurysm embolization was analysed. RESULTS We observed that the mean VERs of the small, medium, large, and giant aneurysms were 40.8±26.5%, 18.6±16.1%, 2.3±2.1% and 0.4±0.1%, respectively and the differences were statistically significant (F=7.091, P=0.000). The mean VERs of the wide- and small-necked aneurysms were 27.5±23.1% and 29.4±26.6%, respectively. There was no significant difference between these values. The mean VERs of aneurysms causing complete occlusion, neck residual and partial embolization were 41.8±29.3%, 31.4±21.2%, 12.3±15.1%, respectively, and the differences were statistically significant (F=7.97, p=0.001). CONCLUSION The VER is an objective index with which to evaluate aneurysm embolization and is a significant predictor of the efficacy of intracranial aneurysm embolization.