Does a Low-wall Coverage Stent Have a Flow Diverting Effect in Small Aneurysms?.
10.5469/neuroint.2015.10.2.89
- Author:
Hairi LIU
1
;
Jooae CHOE
;
Seung Chul JUNG
;
Yunsun SONG
;
Ku Hyun YANG
;
Kye Jin PARK
;
Hae Won GOO
;
Won Hyong PARK
;
Dae Chul SUH
Author Information
1. Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea. dcsuh@amc.seoul.kr
- Publication Type:Original Article
- Keywords:
Stent;
Intracranial aneurysm;
Hemodynamics
- MeSH:
Aneurysm*;
Arteries;
Choroid;
Follow-Up Studies;
Headache;
Hemodynamics;
Humans;
Hypertension;
Intracranial Aneurysm;
Rupture;
Stents*;
Thromboembolism
- From:Neurointervention
2015;10(2):89-93
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKBROUND AND PURPOSE: The flow diverting effect of a low-wall coverage stent remains controversial. We evaluted patients who underwent stenting for small aneurysms with a low but potential risk of growth and reviewed related literature. MATERIALS AND METHODS: We evaluated 9 small aneurysms among 19 unruptured intracranial aneurysms from eight patients who underwent stenting. The patients had unexplainable severe headache (n = 8), aneurysm originating from the anterior choroidal artery (n = 3), potential growth or rupture risks including hypertension (n = 5), and multiple aneurysms (n = 6). Stents with a relatively low-wall coverage ratio (8-10%) were used. Clinical and angiographic outcomes were assessed. RESULTS: One (n = 8) or two stents (n = 1) were used without any procedural difficulties or complications. Although no immediate changes of aneurysm morphology were observed, aneurysms decreased in size (n = 8) when examined by DSA (n = 8) or MRA (n = 1) during a median 28.9-month follow-up. There were no adverse events, including thromboembolism, aneurysm rupture, or stent movement during a median 31.9-month clinical follow-up (range: 17-69 months). CONCLUSION: Although a variable degree of aneurysm size decrease may not prevent further growth or rupture of small aneurysms, stenting with a low-wall coverage ratio may have some advantageous hemodynamic effect. Flow modification of stent architecture vs. aneurysm characteristics, including size and location, on long-term outcome, requires further clarification.
