Y-Shaped Bifurcation Implant for Aneurysm Flow Isolation
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Solution Overview
Problem
Existing treatments for bifurcation aneurysms, such as flow diverters, require precise sequential insertion of multiple parts, making placement difficult and risking obstruction of branching vessels, especially in the intracranial region.
Innovation Solution
A bifurcation implant with interconnected braid sections that can be delivered as a unit, featuring openings created by lateral wire displacement, allowing for easier placement and expansion to isolate the aneurysm from blood flow while maintaining flow through branching vessels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sequential insertion of multiple flow diverter parts is used, then aneurysm isolation can be achieved, but placement precision and operation complexity deteriorate
Solution Approach 1:
The patent combines multiple flow diverter parts into a single integrated implant unit with a Y-shaped structure. The first and second braid sections are connected such that the second section passes through the first section, creating a unified device that can be inserted as one component rather than sequentially, thereby improving placement precision while maintaining aneurysm isolation effectiveness.
2Reliability
If flow diverters with fine mesh size are used, then aneurysm access point closure is improved, but risk of branch vessel obstruction increases
Solution Approach 1:
The patent applies different mesh sizes to different sections of the implant. The first braid section has a finer mesh structure for effective aneurysm closure, while the second braid section has a coarser mesh that allows blood flow through branch vessels. This localized differentiation of mesh quality enables effective aneurysm isolation while preserving branch vessel patency.
3Reliability
If occlusion coils are used for aneurysm filling, then thrombus formation is promoted, but coil displacement and vessel obstruction risk increase
Solution Approach 1:
The patent establishes a stable structural framework (the braid sections) before introducing occlusion coils into the aneurysm sac. The interconnected braid sections create a confined structure that prevents coil displacement, allowing coils to be safely deployed for thrombus formation without the risk of protrusion into branch vessels or complete dislodgement.
4Reliability
If stent-like implants are used to close aneurysm access, then blood flow isolation is achieved, but device complexity and insertion difficulty increase
Solution Approach 1:
The patent integrates the functions of multiple stent-like implants into a single Y-shaped device. The first and second braid sections work together as one unit to isolate the aneurysm from blood flow, eliminating the need for sequential insertion of multiple separate stents and thereby reducing procedural complexity while maintaining effective blood flow isolation.
Data Source
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Figure 3
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AI summary
The invention relates to an implant (6, 18) for influencing the blood flow in the region of aneurysms which are localised at vascular branches; wherein the implant (6, 18) is available in an expanded state, in which it is implanted in the blood vessel, and in a contracted state, in which it can be moved through the blood vessel; wherein the implant (6, 18) comprises a first (1, 14) and a second braided portion (2, 15) which are tubular in the expanded state and the walls of which are constructed from individual interwoven wires (3); wherein the first (1, 14) and the second braided portion (2, 15) each comprise an opening (4, 5, 16, 17) in the wall and at least the size of the opening (5, 17) in the second braided portion (2, 15) is sufficient for the first braided portion (1, 14) to be guided through; wherein the openings (4, 5, 16, 17) in the walls are made such that the wires (3) forming the braided portions (1, 2, 14, 15) are radially displaced at the positions of the openings (4, 5, 16, 17) and the first braided portion (1, 14) is guided through the opening (5, 17) in the wall of the second braided portion (2, 15) such that the opening (4, 16) in the wall of the first braided portion (1, 14) points towards the opening (5, 17) in the wall of the second braided portion (2, 15).