The safety and efficacy of endovascular treatment of intracranial aneurysms have been confirmed by many large-sample clinical studies, but for some complex intracranial aneurysms, such as large or giant aneurysms, fusiform aneurysms, tandem aneurysms, and vesicular aneurysms, the effect of traditional endovascular tamponade is not satisfactory. Different from the previous aneurysm tamponade, the flow diverter (FD) is to change the direction of blood flow in the tumor-bearing artery to reduce or weaken the blood flow impact in the aneurysm, achieve the purpose of blood retention and thrombosis in the aneurysm tumor, and finally form new endothelial cells on the surface of FD and the neck of the aneurysm, so as to achieve complete occlusion and cure of the aneurysm; At the same time, the reconstruction of the tumor-bearing artery is also achieved, and the risk of recurrence and recanalization of the aneurysm is reduced[1]。 A meta-analysis showed that after traditional endovascular therapy (coil embolization, stent-assisted coil embolization), the recurrence and recanalization rate of aneurysms was 20%, while the retreatment rate was 10%[2]。 In contrast, recanalization of intracranial aneurysms after treatment with FD is rarely reported at present.
