Vascular Prosthesis Fenestration Ring Expansion
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Solution Overview
Problem
Current endovascular repair devices face challenges in maximizing blood flow to vital organs and minimizing endoleaks during the treatment of aortic aneurysms, particularly in regions with juxtarenal and short-neck abdominal aortic aneurysms, where anatomical variations and size discrepancies between grafts and branch prostheses complicate the procedure.
Innovation Solution
A vascular prosthesis with a luminal graft component and a fenestration ring that can expand to accommodate branch prostheses, allowing for adjustable fenestration diameters to ensure a secure seal and reduce endoleak incidence, featuring a main component with opposing ends connected by a bridging component that expands upon branch prosthesis insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size fenestration is used in the graft component, then the device structure is simple, but it cannot accommodate anatomical variations in branch vessel sizes
Solution Approach 1:
The fenestration ring is designed with dynamic characteristics, allowing it to expand from a compressed delivery state to an expanded deployed state. The ring includes a main component with opposing ends and a connecting component that bridges the ends, creating a structure that can change diameter. This dynamic structure enables the fenestration to accommodate varying branch vessel sizes while maintaining a relatively simple overall device design.
2Adaptability or versatility
If a larger fenestration diameter is used, then larger branch prostheses can be accommodated, but the seal between the graft and branch prosthesis deteriorates
Solution Approach 1:
The fenestration ring provides a dynamic sealing mechanism that adapts to the size of the inserted branch prosthesis. When the branch prosthesis is inserted and expanded, the fenestration ring expands accordingly, maintaining contact and seal quality regardless of the branch prosthesis size. This dynamic adjustment ensures reliable sealing while accommodating various anatomical variations.
Solution Approach 2:
The fenestration ring diameter is changed as a parameter in response to the inserted branch prosthesis size. The ring transitions from a first diameter in the compressed state to a second, larger diameter in the expanded state, allowing the seal interface to adapt to different branch prosthesis dimensions while maintaining effective sealing.
3Adaptability or versatility
If the fenestration ring diameter is expanded to accommodate branch prosthesis insertion, then adaptability improves, but the structural stability during delivery is compromised
Solution Approach 1:
The fenestration ring exhibits dynamic structural characteristics, maintaining stability in its compressed delivery configuration while allowing expansion to a larger diameter during deployment. The main component with opposing ends and the connecting component create a structure that is stable when compressed for delivery but can reliably expand when needed, providing both stability and adaptability at different stages of the procedure.
Data Source
AI summary
The vascular prosthesis includes a luminal graft component having at least one fenestration. At least one fenestration ring borders the at least one fenestration and is fixed to the luminal graft component. The fenestration ring includes a main component with two opposing ends and a connecting component. The diameter of the fenestration ring can expand upon insertion of a branch prosthesis through the fenestration ring during implantation at a surgical site. The vascular prosthesis can be implanted in a patient to thereby treat, for example, an arterial aneurysm, spanning a region of an aneurysm that includes at least one arterial branch.