Wing Bifurcation Reconstruction Device for Aneurysm Coil Containment
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Solution Overview
Problem
Current devices struggle to effectively treat aneurysms at bifurcations due to challenges in preventing coil herniation and maintaining blood flow, especially when the neck ratio is less than 2:1 or greater than 4 mm, leading to potential arterial occlusion and stroke.
Innovation Solution
An intraluminal device with a proximal section anchored in a blood vessel and a distal section featuring expandable wings that pivot to create scaffolding, inhibiting herniation of objects from the aneurysm neck while allowing perfusion to efferent vessels, formed from a single sheet or tube with wings that fold through each other to support implants and divert flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tubular remodeling devices are used to prevent coil herniation, then coil containment is improved, but positioning and shaping difficulty increases especially at bifurcations
Solution Approach 1:
The device is divided into multiple functional segments: a proximal section for anchoring in the parent vessel, a distal section with expandable wings for positioning at the bifurcation, and a mesh portion for coil containment. This segmentation allows each part to perform its specific function independently, making the overall device easier to position and shape at complex bifurcation anatomy while maintaining reliable coil containment.
Solution Approach 2:
The device incorporates dynamic elements including expandable wings that can be deployed from a compressed state, and a mesh portion that can be expanded to engage with the aneurysm neck. These dynamic components allow the device to adapt to varying anatomical configurations at bifurcations, improving ease of positioning while maintaining coil containment reliability.
2Reliability
If embolization coils are used to treat aneurysms with large neck ratios, then aneurysm occlusion is improved, but coil herniation risk increases
Solution Approach 1:
The mesh portion acts as an intermediary structure between the embolization coils and the parent vessel. It provides a containment barrier that prevents coil herniation while allowing the coils to effectively occlude the aneurysm. The mesh portion can be expanded to engage with the aneurysm neck, creating a stable interface that holds the coils in place even in aneurysms with large neck ratios.
Solution Approach 2:
The device combines different material properties: the proximal section uses material for strong anchoring in the parent vessel, the mesh portion uses material that can be expanded to engage the aneurysm neck, and the distal section uses material that can be compressed for delivery. This composite approach allows the device to simultaneously provide coil containment and prevent herniation in challenging anatomical cases.
3Reliability
If devices are positioned at bifurcation aneurysms, then aneurysm treatment is improved, but blood flow obstruction to efferent vessels increases
Solution Approach 1:
The device applies local quality by positioning the mesh portion specifically at the aneurysm neck rather than completely blocking the bifurcation. The proximal section anchors in the parent vessel while the distal section with expandable wings positions the mesh at the critical aneurysm location. This localized approach treats the aneurysm while preserving blood flow through the efferent vessels, as the mesh is positioned to contain coils without obstructing the flow paths to the branch vessels.
Data Source
AI summary
An intraluminal device may be used at a bifurcation to anchor in an afferent vessel, allow perfusion to efferent vessels, and act as scaffolding to inhibit herniation of objects out of a neck of a bifurcation aneurysm. An intraluminal device may include a first side; a second side opposite the first side across a longitudinal axis of the intraluminal device; a proximal section configured to anchor in an afferent vessel; a distal section comprising a first wing and a second wing wherein, in an expanded state, the first wing extends from the first side to the second side and the second wing extends from the second side, through an opening of the first wing, and to the first side.