Endovascular treatment of distal internal carotid artery aneurysms and vertebral artery dissecting aneurysms with the Willis covered stent: A single-center, retrospective study

Wu, Yu; Yu, Jianqun; Zhang, Tao; Deng, Jianping; Zhao, Zhenwei

doi:10.1177/15910199211070900

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Endovascular therapy has become acceptable for poor surgical candidates or cases with difficulty of management, especially use of covered stents. Covered stents have been used to treat intracranial and extracranial carotid aneurysms, carotid-cavernous fistulas, pseudoaneurysms, and recurrent and blister aneurysms, resulting in good effects 6 – 14 . The use of covered stents has made it possible to operate only within the parent artery without navigating endovascular devices into the aneurysm cavity or fistula for embolization.…”

Section: Introductionmentioning

confidence: 99%

Endothelialization of PTFE-covered stents for aneurysms and arteriovenous fistulas created in canine carotid arteries

Yang,

Hao,

Gao

et al. 2024

Sci Rep

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To investigate the endothelialization of covered and bare stents deployed in the canine carotid arteries and subclavian arteries for treating experimental aneurysms and arteriovenous fistulas, twenty aneurysms were created in 10 dogs, and 20 fistulas in another 10 dogs. The Willis balloon-expandable covered stent and a self-expandable covered stent were used to treat these lesions, and a self-expandable bare stent was deployed in the subclavian artery for comparison. Followed up for up to 12 months, the gross observation, pathological staining, and scanning electronic microscopic data were analyzed. Two weeks after creation of animal model, thirty self-expandable covered stents and ten balloon-expandable covered stents were deployed. Fifteen bare stents were deployed within the left subclavian arteries. Twenty days after stenting, the aneurysm significantly shrank. At 6 months, the thrombi within the aneurysm cavity were organized. Three to 12 months later, most covered and bare stents were covered by a thin transparent or white layer of endothelial intima. Layers of intima or pseudomembrane were formed on the stent 20–40 days after stent deployment. Over three months, the pseudomembrane became organized, thinner, and merged into the vascular wall. Under scanning electronic microscopy, the surface of covered and bare stents had only deposition of collagen fibers and rare endothelial cells 20–40 days after stenting. From three to ten months, the endothelial cells on the internal surface of stent became mature, with spindle, stripe-like or quasi round morphology along the blood flow direction. Over time, the endothelial cells became mature. In conclusion, three months after deployment in canines’ arteries, the self-expandable bare and covered stents have mostly been covered by endothelial cells which become maturer over time, whereas the balloon-expandable covered stents do not have complete coverage of endothelial cells at three months, especially for protruding stent struts and areas. Over time, the endothelialization will become mature.

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Section: Introductionmentioning

confidence: 99%

Endothelialization of PTFE-covered stents for aneurysms and arteriovenous fistulas created in canine carotid arteries

Yang,

Hao,

Gao

et al. 2024

Sci Rep

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Flow diverter versus stent-assisted coiling treatment for managing dissecting intracranial aneurysms: A systematic review and meta-analysis

Brenner,

Prestes,

Soares

et al. 2024

Interv Neuroradiol

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Background Dissecting intracranial aneurysms (DIAs) have been treated through endovascular reconstructive manners, such as flow diverters (FDs) and stent-assisted coiling (SAC). Notably, no robust evidence has compared both approaches. Hence, the authors conducted a meta-analysis to compare their outcomes. Methods PubMed, Embase and Web of Science were searched for studies employing SAC and FD treatment for DIAs. The following outcomes were considered for extraction: procedure-related mortality, total mortality, postoperative and follow-up complete aneurysm occlusion, complications, good clinical outcomes, recurrence, and retreatment. Odds ratio (OR) with random effects was employed for statistical comparison. Results The meta-analysis included 10 studies. A total of 195 and 222 patients were included in the FD and the SAC group, respectively. Stent-assisted coiling had higher postoperative complete aneurysm occlusion rates (OR 0.03; 95% CI 0.01–0.08). Flow diverter retreatment rate was lower, but without statistical significance (OR 0.35; 95% CI 0.11–1.10). No significant differences were found in follow-up complete aneurysm occlusion (OR 1.18; 95% CI 0.35–3.99); total mortality (OR 0.44; 95% CI 0.09–2.08); intraoperative complications (OR 0.30; 95% CI 0.06–1.45); postoperative complication (OR 0.77; 95% CI 0.35–1.70); good clinical outcomes (OR 0.97; 95% CI 0.43–2.20); and recurrence (OR 0.38; 95% CI 0.13–1.10) between the two groups. Conclusion Stent-assisted coiling shows higher postoperative complete aneurysmal occlusion rates, but both techniques achieve similar rates in angiographic follow-up. Flow diverter has lower, but not statistically significant, retreatment rates than SAC. Both techniques have similar complication rates. Future randomized, multicenter, and prospective studies with larger sample sizes are needed for more conclusive findings.

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Endovascular treatment of distal internal carotid artery aneurysms and vertebral artery dissecting aneurysms with the Willis covered stent: A single-center, retrospective study

Cited by 2 publications

References 31 publications

Endothelialization of PTFE-covered stents for aneurysms and arteriovenous fistulas created in canine carotid arteries

Endothelialization of PTFE-covered stents for aneurysms and arteriovenous fistulas created in canine carotid arteries

Flow diverter versus stent-assisted coiling treatment for managing dissecting intracranial aneurysms: A systematic review and meta-analysis

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