ArticleAJNR. American journal of neuroradiology2025
Factors Associated with Major Re-Recanalization following Second Coiling for Recanalized Aneurysms: A Multicenter Experience over 20 Years during Long-Term Follow-up.
Article in AJNR. American journal of neuroradiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
background and purposeSecond coiling for recanalized aneurysms can mitigate the risk of delayed rupture, though re-recanalization may still occur. However, factors associated with re-recanalization after second coiling for recanalized aneurysms have yet to be adequately investigated. The present study explored a large, multicenter data set accumulated over 20 years to identify factors associated with major re-recanalization after second coiling for recanalized aneurysms. MATERIALS AND
methodsWe retrospectively reviewed 188 consecutive aneurysms in 185 patients who underwent second coiling for saccular recanalized aneurysms at 3 institutions from January 2003 to December 2023. Patients were classified into 2 groups: with major re-recanalization (R group) and without major re-recanalization (NR group). To identify factors associated with major re-recanalization, clinical, anatomic, and procedural characteristics were compared between the 2 groups by multivariate logistic regression analysis and stepwise selection.
resultsDuring follow-up (mean, 62.3 ± 51.2 months), 72 (38.3%) of the 188 recanalized aneurysms showed major re-recanalization. In univariate analysis, compared with the NR group, the R group showed significantly larger aneurysm size, neck size, and aneurysm volume at first coiling and lower rates of stent-assisted coiling, use of an intermediate catheter (IMC), and complete occlusion at second coiling. Stepwise multivariate logistic regression analysis revealed neck size at first coiling (OR 1.18; 95% CI: 1.04-1.33) as an independent risk factor and stent-assisted coiling (OR 0.34; 95% CI: 0.15-0.79), use of an IMC (OR 0.35; 95% CI: 0.16-0.80), and complete occlusion at second coiling (OR 0.16; 95% CI: 0.033-0.70) as independent protective factors for major re-recanalization.
conclusionsThe main risk factor for major re-recanalization after second coiling of recanalized aneurysms was neck size at first coiling, and protective factors included stent-assisted coiling, use of an IMC, and complete occlusion at second coiling. Second coiling for recanalized aneurysms may reduce the risk of major re-recanalization by using a stent or IMC and achieving complete occlusion.
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