Morphologic and Clinical Outcome of Intracranial Aneurysms after Treatment Using Flow Diverter Devices: Mid-Term Follow-Up

Abstract EN

Flow diverters (FDs) are designed for the endovascular treatment of complex intracranial aneurysm configurations.

From February 2009 to March 2013 28 patients (22 females, 6 males) were treated with FD; mean age was 57 years.

Data, including aneurysm features, clinical presentation, history of previous bleeding, treatment, and follow-up results, are presented.

Early postinterventional neurological deficits (transient: n = 3 /enduring: n = 1 ) appeared in 4/28 patients (14%), and early improvement of neurological symptoms was observed in 7 patients with previous restriction of cranial nerve function.

The overall occlusion rate was 20/26 (77%; 59% after 3 months).

77% achieved best results according to O’Kelly-Marotta score grade D with no contrast material filling (70% of those after 3 months).

In 4/6 patients who did not achieve grade D, proximal and/or distal stent overlapping ≥5 mm was not guaranteed sufficiently.

During follow-up we did not detect any aneurysm recurrence or haemorrhage.

In-stent stenosis emerged as the most frequent complication (4/27; 15%) followed by 2 cases of vascular obliteration (AICA/VA).

In conclusion endovascular reconstruction using a FD represents a modern and effective treatment in those aneurysms that are not suitable for conventional interventional or surgical treatment.

The appearance of severe complications was rare.