Aneurysm Device Anchoring with Bifurcation Loops
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Solution Overview
Problem
Current surgical methods for treating aneurysms are highly invasive and pose risks due to the difficulty in accurately implanting and maintaining vaso-occlusive devices within the aneurysm, especially in wide-neck aneurysms and those at vascular bifurcations, which can lead to device migration and interference with blood flow.
Innovation Solution
An implantable aneurysm device with additional anchoring mechanisms, featuring a closure structure and a supplemental stabilizer with hinge points and loop elements that deploy to securely anchor within bifurcated side branches, preventing migration and ensuring effective occlusion of the aneurysm neck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vaso-occlusive devices are implanted in wide-neck aneurysms or at vascular bifurcations, then the aneurysm can be occluded, but the device may migrate or project from the cavity interfering with blood flow
Solution Approach 1:
The device is divided into multiple functional segments: a closure structure for occluding the aneurysm neck and supplemental stabilizers with loop elements for anchoring in side branches. This segmentation allows each component to perform its specific function independently, improving overall device retention while preventing migration through distributed anchoring points
Solution Approach 2:
The supplemental stabilizers with loop elements are designed to nest within the side branch vessels, creating a nested anchoring system. The loop elements can be delivered through the catheter and deployed within the side branches, providing internal support and preventing device migration from the aneurysm cavity
2Reliability
If additional anchoring mechanisms are added to prevent device migration, then device retention is improved, but the device complexity increases
Solution Approach 1:
The closure structure serves multiple functions: it occludes the aneurysm neck and provides attachment points for the supplemental stabilizers. The supplemental stabilizers with loop elements also serve dual purposes by anchoring in side branches and providing structural support. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity
Solution Approach 2:
The device utilizes flexible materials and thin-film structures that can be compressed into a small profile for delivery through catheters and then expand to provide stable anchoring. The flexibility allows the device to adapt to the complex geometry of wide-neck aneurysms and bifurcated vessels without requiring complex mechanical structures
Data Source
AI summary
The present technology relates to aneurysm devices with additional anchoring mechanisms, and associated systems and methods. The aneurysm device is endovascularly deliverable to a site proximate an aneurysm near a parent artery with bifurcating branches. The device can include a closure structure comprising a distal-facing aspect configured to at least partially occlude the aneurysm. The closure structure can be formed from a generally flat pattern and is transformable between a compressed configuration and a deployed configuration. The device can also have one or more lodging elements which fold to form loop elements configured for anchoring within at least one of the bifurcating branches. The struts of the lodging elements can include hinge points which bias the folding of the lodging elements. The devices further include a supplemental stabilizer connected to the closure structure and configured to reside in the parent artery.