The Success of Flow Diversion in Large and Giant Sidewall Aneurysms May Depend on the Size of the Defect in the Parent Artery

Overview

Journal AJNR Am J Neuroradiol

Specialty Neurology

Date 2014 Jun 28

PMID 24970546

Citations 7

Authors

J C Gentric

T E Darsaut

A Makoyeva

I Salazkin

J Raymond

Affiliations

Soon will be listed here.

Abstract

Background And Purpose: Flow diverters are designed to occlude aneurysms while preserving flow to jailed arterial branches. We postulated that treatment success depended on the size of the aneurysm ostium or defect in the parent artery.

Materials And Methods: Flow diverter expansion and deformation were studied in silicone tubes with wall apertures of various sizes. Large and giant canine sidewall aneurysms, featuring a branch located immediately opposite the aneurysm, and a smaller 6- to 8-mm (group A, n = 6) or a larger 10- to 16-mm (group B, n = 6) ostium were created to study the effects of ostium size on aneurysm or branch occlusion by flow diverters. Angiographic results after deployment and at 3 months were scored by using an ordinal scale. The amount of neointima formation on the segment of the device overlying the aneurysm or the branch ostia was determined by specimen photography.

Results: The fusiform deformation of flow diverters was maximal with larger defects in silicone tubes. At 3 months, group B aneurysms showed worse angiographic results than group A aneurysms, with larger residual aneurysm volumes (P = .002). Neointimal coverage of the aneurysm ostia was more complete in group A compared with group B (P = .002).

Conclusions: The effects of flow diversion may vary with the size of the aneurysm ostium.

Citing Articles

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Efficacy and safety of flow diverters in posterior circulation aneurysms and comparison with their efficacy in anterior circulation aneurysms: A systematic review and meta-analysis.

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Dmytriw A, Phan K, Moore J, Pereira V, Krings T, Thomas A AJNR Am J Neuroradiol. 2019; 40(4):591-600.

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Ostium Ratio and Neck Ratio Could Predict the Outcome of Sidewall Intracranial Aneurysms Treated with Flow Diverters.

Paliwal N, Tutino V, Shallwani H, Beecher J, Damiano R, Shakir H AJNR Am J Neuroradiol. 2019; 40(2):288-294.

PMID: 30679216 PMC: 6375759. DOI: 10.3174/ajnr.A5953.

Outcome prediction of intracranial aneurysm treatment by flow diverters using machine learning.

Paliwal N, Jaiswal P, Tutino V, Shallwani H, Davies J, Siddiqui A Neurosurg Focus. 2018; 45(5):E7.

PMID: 30453461 PMC: 6421840. DOI: 10.3171/2018.8.FOCUS18332.

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