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Does a Low-wall Coverage Stent Have a Flow Diverting Effect in Small Aneurysms?
Hairi Liu1, Jooae Choe2, Seung Chul Jung2
1Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea. ; Department of Interventional Radiology, Taizhou People's Hospital, Taizhou, Jiangsu Province 225300, P. R. China.
Low-wall coverage stents may offer hemodynamic benefits for small intracranial aneurysms, leading to size reduction over time. Further research is needed to clarify their long-term impact on aneurysm growth and rupture risk.
Area of Science:
- Neurosurgery
- Interventional Radiology
- Vascular Medicine
Background:
- The efficacy of low-wall coverage stents in treating intracranial aneurysms is debated.
- Small aneurysms pose a risk of growth and rupture, necessitating effective treatment strategies.
Purpose of the Study:
- To evaluate the flow-diverting effect and clinical outcomes of low-wall coverage stents in small intracranial aneurysms.
- To assess the safety and efficacy of these stents in patients with specific risk factors.
Main Methods:
- Retrospective analysis of 9 small aneurysms in 8 patients treated with low-wall coverage stents (8-10% ratio).
- Patients presented with symptoms like severe headache, specific aneurysm locations, and risk factors such as hypertension.
- Clinical and angiographic outcomes were monitored, including aneurysm morphology, size changes, and adverse events.
Main Results:
- Stenting procedures were completed without immediate complications.
- Aneurysm size decreased in 8 out of 9 cases during a median follow-up of 28.9 months.
- No adverse events like thromboembolism or rupture occurred during a median clinical follow-up of 31.9 months.
Conclusions:
- Low-wall coverage stents may provide a favorable hemodynamic effect, contributing to aneurysm size reduction.
- While size decrease is observed, the long-term prevention of growth or rupture requires further investigation.
- The interplay between stent design, aneurysm characteristics, and long-term outcomes needs additional clarification.
