RESUMO
Objective To investigate the safety and effectiveness of using low-profile visualized intraluminal support (LVIS) stents for the treatment of aneurysms in the small intracranial vessels (diameter <2.5 mm).Methods Between October 2014 and April 2016,the clinical data of all 30 patients with intracranial saccular aneurysm treated with LVIS stents with the small parent arteries <2.5 mm in diameter in Changhai Hospital,the Second Military Medical University were analyzed retrospectively,including 7 ruptured aneurysms and 23 unruptured aneurysms.The anterior circulation aneurysm accounted for 93.3% (n=28),and the diameters of the parent arteries were 1.6-2.4 mm.The complications associated with surgery,angiography,clinical outcomes,and mid-term follow-up data were analyzed.Results The success rate of stent implantation was 100%.Immediate embolization results:Raymond grade Ⅰ in 12 cases (40.0%),Raymond grade Ⅱ in 11 cases (36.7%),and Raymond grade Ⅲ in 7 cases (23.3%).Complications occurred in 2 cases,including one perforating artery occlusion and one intraoperative rupture.Twenty-five patients accepted the angiographic follow-up (Raymond grade Ⅰ in 21 cases,grade Ⅱ in 3 cases,and grade Ⅲ in 1 case).The follow-up time ranged from 4 to 14 months,with an average of 8.1± 2.6 months.One patient had asymptomatic intracranial artery stenosis in the distal end of the stent.No new neurological dysfunction or death occurred.Conclusion The deployment of LVIS stents in small vessels is safe and feasible,the effect of mid-term follow-up is better.However,a larger sample study and long-term follow-up results are needed.