[Application of LVIS stents in very small  intracranial aneurysms].
OBJECTIVE
To investigate the safety and short-term efficacy of stent on 17 patients with very small intracranial aneurysms.


METHODS
A total of 17 patients with very small intracranial aneurysms were treated by LVIS stent from October 2014 to November 2015. The location, size of the aneurysms and the branch around aneurysms were evaluated by digital subtraction angiography (DSA). The metal coverage for aneurysms was enhanced by using deployment technology ("compression" mode). The safety and efficacy were assessed after operation.


RESULTS
LVIS stents-assisted treatments for very small aneurysms were carried out in 17 cases, including 7 cases of paraclinoid aneurysms, 4 cases of posterior communicating artery aneurysms, 3 cases of anterior communicating artery aneurysms, 2 cases of carotid bifurcation aneurysms, 1 case of the superior cerebellar artery aneurysm. The stents for 17 patients with very small intracranial aneurysms were released completely (100%); Raymond grade I embolization was seen in 13 cases (76.5%); Raymond grade II embolization was seen in 4 cases (23.5%); during the follow up from a month to a year, 16 patients showed good curative effect (with the mRS score at 0-2), 1 showed poor effect (with the mRS score at 3-6), and the efficacy rate was 94.1%; no perioperative hemorrhagic and ischemic complications happened.


CONCLUSIONS
LVIS stent-assisted therapy for very small intracranial aneurysms by using deployment technology was safe and feasible, which can significantly improve the embolization rate for very small aneurysms.
Department of Neurosurgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Mingming
M
Zhang
Department of Neurosurgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Yian
Y
Ouyang
Department of Neurosurgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Hao
H
Huang
Department of Neurosurgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Yugang
Y
Jiang
Department of Neurosurgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Mengqiang
M
Yu
D001488:Basilar Artery; D004621:Embolization, Therapeutic; D006801:Humans; D002532:Intracranial Aneurysm; D012449:Safety; D015607:Stents