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Occlusion of canine aneurysms using microporous self-expanding stent grafts: Long-term follow-up.
MedLine Citation:
PMID:  24908214     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
PURPOSE: The treatment of large or giant cerebral aneurysms by surgical and/or endovascular techniques is difficult and poses relatively high risks. Therefore, a microporous self-expanding (hybrid) stent graft composed of a thin, expandable, segmented polyurethane (SPU) membrane with micropores and a drug-delivery system was developed.
MATERIALS AND METHODS: A commercially available, self-expanding carotid stent was covered with a thin microporous SPU membrane fabricated by the dip-coating method and the excimer laser ablation technique, with an intraluminal coating of argatroban. Experimentally fabricated lateral-wall aneurysms in canine carotid arteries using venous pouches were occluded with the hybrid stent graft (bale-shaped pore density of 23.6%) on one side and a bare-metal stent on the other side without systemic antiplatelet therapy.
RESULTS: Angiography at 1, 6, and 12 months of stenting revealed that all arteries were patent without marked stenosis without systemic antiplatelet therapy. All aneurysms treated with hybrid stent grafts remained occluded throughout the 12-month period, while among those treated by bare-metal stents, 2 of 3 aneurysms were occluded at 6 months (67%) and only 1 of 3 aneurysms were occluded at 12 months (33%). Histology revealed that the novel hybrid stent graft had less intimal hyperplasia than the bare-metal stent. The hybrid stent graft was useful for the successful occlusion of these canine carotid aneurysms, even at 12 months.
CONCLUSIONS: The novel hybrid stent grafts are expected to overcome the disadvantages of fully covered stent grafts and simple bare-metal stents, while combining both their merits, and appear to be useful in the treatment of large or giant cerebral aneurysms.
Authors:
Shogo Nishi; Yasuhide Nakayama; Hatsue Ishibashi-Ueda; Yoshida Masato
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Publication Detail:
Type:  Journal Article     Date:  2014-04-22
Journal Detail:
Title:  Clinical neurology and neurosurgery     Volume:  122     ISSN:  1872-6968     ISO Abbreviation:  Clin Neurol Neurosurg     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-06-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7502039     Medline TA:  Clin Neurol Neurosurg     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  34-41     Citation Subset:  IM    
Copyright Information:
Copyright © 2014 Elsevier B.V. All rights reserved.
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