MULTILAYER STENT

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Slide 1: 

MULTILAYER STENT A New Concept

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

Slide 5: 

Aneurysms

Saccular Aneurysm Disease : 

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

Slide 7: 

in vitro aneurysm modeling How it works?

Slide 8: 

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

Slide 9: 

Popliteal_aneurysm_without_branch

Slide 10: 

Branches

Slide 11: 

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

Slide 12: 

How it works?

Slide 13: 

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

Slide 14: 

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

Slide 15: 

renal_aneurysm_with_branch

Slide 16: 

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

Slide 17: 

Fusiform Aneurysm stent

Slide 18: 

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

Slide 19: 

Peripheral Diseases

Slide 20: 

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

Slide 21: 

The Origine of Hyperplasia Recirculation around the stent struts

Slide 22: 

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

Slide 23: 

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

Slide 24: 

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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