Bifurcation Aneurysm Insertion System with Independent Sleeve Release
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Solution Overview
Problem
Current methods for treating bifurcation aneurysms, such as flow diverters and occlusion coils, face challenges in precise placement and risk of occluding nearby branches, and require multiple steps for implant deployment, making them difficult to use effectively, especially in the intracranial region where precise control over long distances is needed.
Innovation Solution
An insertion system with two distal tubular implant sections and a proximal trunk section, utilizing separate sleeves for each implant section that can be independently released through a proximal retraction mechanism, allowing for one-step deployment and precise control over the implant's placement in bifurcation aneurysms, ensuring blood flow is maintained in branching vessels while isolating the aneurysm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate implants are used to treat bifurcation aneurysms, then coverage of the aneurysm and branching vessels is improved, but the complexity of insertion and positioning increases
Solution Approach 1:
The patent combines multiple separate flow diverter implants into a single integrated bifurcation flow diverter device with a unified structure that includes a first flow diverter portion for the first branch vessel, a second flow diverter portion for the second branch vessel, and a main body portion for the parent blood vessel. This merging approach maintains reliable coverage of the aneurysm and branching vessels while significantly simplifying the insertion process by allowing all components to be deployed simultaneously through a single insertion catheter in one procedural step.
Solution Approach 2:
The patent employs a nested configuration where the first and second flow diverter portions are positioned within or adjacent to the main body portion, creating a hierarchical structure that fits together like nested dolls. The insertion catheter itself is designed to contain the entire bifurcation flow diverter device during delivery, with the device nested within the catheter lumen until deployment. This nesting principle allows the complex multi-branch structure to be delivered through a single access point without requiring separate insertion procedures for each component.
2Reliability
If flow diverters with narrow mesh width are used to obstruct aneurysm access, then aneurysm isolation is improved, but the risk of occluding nearby side branches increases
Solution Approach 1:
The patent applies different structural characteristics to different portions of the device: the first and second flow diverter portions have narrow mesh widths specifically in the regions that contact or approach the aneurysm to ensure effective isolation, while the main body portion and regions near side branch openings have wider mesh widths or are configured with larger interstices to permit blood flow through side branches. This local differentiation of mesh width allows the device to simultaneously achieve reliable aneurysm isolation while minimizing the risk of occluding nearby side branches.
Solution Approach 2:
The bifurcation flow diverter is segmented into distinct functional portions: a main body portion for the parent vessel, first and second flow diverter portions for the branch vessels, and side branch openings that provide dedicated pathways for侧支血管 flow. Each segment is optimized with appropriate mesh characteristics - the aneurysm-contacting segments have narrow mesh for isolation, while the side branch regions have wider openings to maintain patency of adjacent vessels.
3Manufacturing precision
If step-by-step deployment of multiple implants is performed, then precise positioning is improved, but the time and complexity of the procedure increase
Solution Approach 1:
The patent merges multiple positioning functions into a single integrated deployment mechanism. The bifurcation flow diverter device is constructed as one unified unit with predetermined geometric relationships between the main body portion and the first and second flow diverter portions, ensuring that when the device is deployed from the insertion catheter, all components are positioned precisely relative to each other in a single action. This eliminates the need for sequential positioning of separate implants and reduces procedure time while maintaining the precision required for accurate placement in bifurcation anatomy.
Data Source
AI summary
The invention relates to an insertion system for an implant (1) for influencing the blood flow in the region of aneurysms (22) located at vascular bifurcations. The implant (1) has two distal tubular implant portions (2) which are intended to be placed in blood vessels (21) branching off from the stem blood vessel (20) and which are connected to one another at a branching point (4). The insertion system has two sleeves (5) which are each designed to hold a distal tubular implant portion (2). The two sleeves (5) each have a distal sleeve portion (6) and the distal sleeve portions (6) each have an opening zone (7) extending in the longitudinal direction. The distal sleeve portions (6) are each adjoined proximally by a proximal portion (8), by means of which the sleeves (5) can be retracted in the proximal direction so that the opening zones (7) open and the distal tubular implant portions (2) each pass through the opening zones (7) and are released into the branching blood vessels (21). Alternatively, it is also possible to use an individual sleeve which has an opening zone for gradual release of the implant (1) or an insertion system with the implant (1) releasably attached to the outside.