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Multilayer Stent: A Global Solution : 

Multilayer Stent: A Global Solution Cerebral Aneurysm -Saccular & Bifurcated (new approach) Aortic Aneurysms (AAA & TAA) -Saccular & Fusiform W/O branch (new approach) Peripheral Diseases -Iliac & Femoral (new approach) -Carotid Aortic Dissection -All types (preserving collaterals)

Multilayer Concept : 

Multilayer Concept The Design : Braided stent 3D structure 2D structure -like Wallstent-

Stent Properties : 

Stent Properties

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Saccular Aneurysm Disease : 

Saccular Aneurysm Disease The Multilayer stent reduces the flow velocity, up to 90%, within the saccular aneurysm allowing: physiological thrombosis.

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in vitro aneurysm modeling How it works?

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K Baráth, F Cassot How it works? Vortex formation W/O stent Velocity Vortex Slow with stent vortex

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allowing physiological shrink, if it is a sac with branch Saccular Aneurysm Disease with branch Patent Lumbers

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How it works?

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Collaterals Principle The multilayer design improves inflow into collateral circulation that keeps different size collateral arteries patent. Systematic turbulence at normal branch Persistance of turbulence with 1 layer stent Flow alignment with multilayer stent

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Clinical effect on collaterals The endothelial cells stop at the edge of the 2 lumbars

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How it works Hemodynamically? The pressure flow drops , through the layers, which induces the velocity increases . The flow stream lines became aligned : then the flow is laminated

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Fusiform Aneurysm stent

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It laminates the flow along the aneurysmal and shrinks along the side branch (eliminates vortex separation near the wall) Fusiform Aneurysm Patent branch

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Peripheral Diseases

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Femoral Disease The forces exerted on the SFA The slow flow hemodynamic along the wall, The flow on collaterals and the distal bed flow The Trans Atlantic InterSociety Consensus (TASC), JVS2000 Recommendations The multilayer stent challenges

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The Origine of Hyperplasia Recirculation around the stent struts

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First layer strut Second layer strut The inner layer deviates the flow to the main stream. The flow is accelerated (red arrows) Wall flow principle of Multilayer

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The stent reduces friction near the artery wall & increases the velocity near the inner layer Minimize the chance of hyperplasia. How it works Hemodynamically?

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Delivery System Sizes

Multilayer Stent Features : 

Multilayer Stent Features Multilayer, Braided Integrated, Spatial 3D structure Covers vessel diameters from 2 to 50 mm & over Suitable for long & short stenosis, occlusion lesions and extensive calcifications Suitable for all type of aneurysm Suitable for small & large vessels dissection Preserves the collaterals & improves their flow

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