Modular Aortic Repair Device with Septum and Leg Member
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Solution Overview
Problem
Existing stent grafts for treating aortic aneurysms and dissections face challenges in sealing against healthy vessel walls while avoiding occlusion of critical branch vessels, requiring precise alignment and deployment to maintain blood flow.
Innovation Solution
A modular aortic repair device comprising a base member with a septum dividing it into primary and secondary lumens, and a leg member that can be coupled to the base member to create separate flow paths, allowing blood to bypass diseased areas without obstructing branch vessels, using expandable stents and graft materials for secure attachment and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stent graft is placed inside the vessel to seal against healthy regions, then the seal effectiveness is improved, but the risk of occluding critical branch vessels increases
Solution Approach 1:
The stent graft is divided into multiple modular segments including a body portion and extendable leg portions. Each segment can be independently positioned and deployed to seal against the vessel wall at different locations, allowing the operator to configure the graft to avoid branch vessel openings while maintaining effective sealing at the proximal and distal ends of the treated segment.
Solution Approach 2:
The stent graft incorporates extendable leg portions that can be dynamically adjusted in length and position after initial deployment. This dynamic capability allows the graft to be repositioned or extended to achieve optimal sealing without occluding branch vessels, resolving the contradiction between seal effectiveness and branch vessel patency.
2Reliability
If the stent graft is made to adequately seal against the vessel wall, then the seal effectiveness is improved, but the device complexity increases
Solution Approach 1:
The stent graft is divided into modular segments (body portion and leg portions) that can be deployed sequentially. This segmentation allows each component to be simpler in design while collectively achieving the complex sealing function, reducing overall device complexity compared to a single-piece design with equivalent functionality.
Solution Approach 2:
The body portion of the stent graft is deployed first to establish the primary sealing structure against the vessel wall. Subsequently, the leg portions are extended to complete the sealing configuration. This preliminary action approach allows the main sealing function to be established before adding the extendable components, simplifying the deployment process and reducing device complexity.
3Object-affected harmful factors
If precise alignment and deployment are required to maintain blood flow, then the branch vessel patency is improved, but the difficulty of operation increases
Solution Approach 1:
The extendable leg portions can be adjusted after the stent graft is initially deployed in the vessel. This dynamic adjustment capability allows operators to achieve precise alignment with branch vessels post-deployment, maintaining blood flow without requiring extremely precise initial placement, thereby reducing operational difficulty.
4Reliability
If the stent graft is extended to cover more area for better sealing, then the seal effectiveness is improved, but the risk of occluding branch vessels increases
Solution Approach 1:
The stent graft is divided into a body portion and separate leg portions that can be independently positioned. This segmentation allows the graft to extend over a larger area for better sealing while the leg portions can be specifically directed away from branch vessel openings, preventing occlusion even when the overall graft coverage is extensive.
Data Source
AI summary
Aortic repair devices and associated systems and methods are disclosed herein. An aortic repair device configured in accordance with embodiments of the present technology can include a base member configured to be implanted in an aorta proximate to a diseased portion of the aorta, such as an aneurysm or dissection near the aortic arch. The base member can direct blood flow past the diseased portion of the aorta to perfuse a portion of the aorta distal of the diseased portion. The aortic repair device can further include a leg member configured to be coupled to the base member. The leg member can provide a flow path from the base member to a branch vessel.