Braid-Coil Aneurysm Implant for Stable Neck Coverage
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Solution Overview
Problem
Current treatments for cranial aneurysms, particularly those with wide necks or bifurcations, face challenges in delivering and anchoring intrasaccular devices without obstructing blood flow or requiring ancillary devices that increase treatment complexity and duration, often necessitating antiplatelet therapy.
Innovation Solution
An implant design featuring a braid section with a proximal and distal coil segment and an engagement member, where the braid is advanced from the distal end, expanding within the aneurysm to cover the neck, and the proximal coil segment slides through the braid to enhance coverage and stability, minimizing compaction and improving deliverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ancillary devices such as stents or flow diverters are positioned within the adjoining blood vessel to cover the aneurysm entrance, then the intrasaccular device can be retained within the aneurysm, but treatment time and complexity increase and antiplatelet treatment is required for extended periods
Solution Approach 1:
The patent combines the anchoring function and the embolic function into a single integrated device. The braid section with engagement members provides both structural support for retention and a framework for embolic material placement, eliminating the need for separate ancillary devices like stents or flow diverters.
Solution Approach 2:
The braid section serves multiple functions simultaneously: it acts as an anchoring structure via engagement members, provides a scaffold for embolic material, and covers the aneurysm entrance. This multi-functionality replaces the need for multiple separate devices.
2Reliability
If the entrance to the aneurysm is overpacked with embolic material, then the aneurysm is adequately treated, but blood flow in the adjoining parent blood vessel is impeded
Solution Approach 1:
The engagement members are positioned specifically at the aneurysm entrance region to provide localized anchoring and coverage. This allows adequate packing at the critical entrance area while leaving the parent blood vessel lumen sufficiently open to maintain normal blood flow.
Solution Approach 2:
The device is segmented into a braid section with engagement members at specific locations. This segmentation allows strategic placement of material to cover the aneurysm entrance while preserving parent vessel patency through controlled distribution of embolic material.
3Object-generated harmful factors
If the entrance and/or sac is insufficiently packed, then blood flow is maintained in the parent vessel, but blood flow persists into the aneurysm
Solution Approach 1:
The engagement members are pre-positioned on the braid section to anchor at the aneurysm entrance before embolic material is delivered. This preliminary anchoring action ensures that subsequent embolic material placement will be retained effectively, allowing adequate packing without compromising parent vessel flow.
4Ease of operation
If the braid section is advanced by pushing the proximal end, then the device can be delivered, but the braid compacts and deliverability is reduced
Solution Approach 1:
Instead of pushing the proximal end of the braid which causes compaction, the distal end is pushed through the microcatheter. This inverted delivery approach prevents compression of the braid structure during advancement, maintaining its expandability and structural integrity at the delivery site.
Data Source
AI summary
An aneurysm intrasaccular implant is provided having both a braid section and a coil. The braid section is expandable from a collapsed configuration to an expanded configuration. The coil includes a proximal coil segment extending proximally from the braid section and a distal coil segment extending distally from the braid section. The implant further includes an engagement member both movable within and confined within the braid section. The engagement member is attached to one or more of the proximal coil segment or the distal coil segment.