Expandable Braided Sack Aneurysm Implant with Looping Core
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Solution Overview
Problem
Current embolic implants for aneurysm treatment face challenges such as incomplete occlusion, recanalization, and complications with blood flow due to the complexity of aneurysm morphology, particularly in wide-neck or bifurcation aneurysms, where existing devices like embolic coils may not effectively prevent blood flow or maintain proper positioning.
Innovation Solution
An expandable braided sack implant with an elongated looping portion and a detachment feature, designed to be delivered through a catheter and deployed within an aneurysm, where the braided sack occludes the aneurysm neck and the looping portion winds within the sack to secure the implant, preventing blood flow and promoting thrombotic formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If embolic coils are delivered to the neck of the aneurysm to treat the entrance, then blood flow into the aneurysm is inhibited and thrombotic mass formation is facilitated, but the coils can impede blood flow in the adjoining blood vessel and require ancillary devices for wide neck or bifurcation aneurysms
Solution Approach 1:
The implant is divided into two distinct functional portions: an expandable braided sack portion for occluding the aneurysm neck and an elongated looping portion for filling the aneurysm sac. This segmentation allows each portion to perform its specific function optimally without interfering with blood flow in the parent vessel, as the sack portion is confined to the aneurysm neck while the looping portion is contained within the sac.
Solution Approach 2:
The elongated looping portion is nested within the expandable braided sack portion after deployment. The looping portion is delivered through the catheter first, then the sack portion is expanded around it, creating a nested configuration where the inner looping portion fills the aneurysm sac while the outer sack portion occludes the neck, preventing the loops from protruding into the parent vessel.
2Reliability
If multiple embolic coils are used to fill the aneurysm sac, then the sac is packed with embolic material, but the coils cannot easily be retracted or repositioned and may require ancillary devices for proper positioning
Solution Approach 1:
The implant utilizes dynamic expansion of the braided sack portion after delivery. The sack is delivered in a compressed state within the catheter, then expanded in situ to its final configuration. This dynamic transformation allows the implant to be delivered through a small catheter and then expand to achieve proper packing density and positioning within the aneurysm sac, with the ability to adjust the expansion degree for optimal positioning.
3Reliability
If embolic coils are used to treat aneurysms, then the coils clot the blood creating a thrombotic mass, but aneurysms treated with multiple coils often recanalize or compact because of poor coiling, lack of coverage, or large aneurysm size
Solution Approach 1:
The implant merges two proven embolic technologies into a single integrated device: the expandable braided sack portion (similar to tubular braided implants) and the elongated looping portion (similar to embolic coils). This combination provides both neck occlusion and sac filling in a single device, improving coverage and preventing recanalization by addressing both the entrance and the interior volume of the aneurysm simultaneously.
Data Source
AI summary
An implant having an elongated portion and an expandable braided sack portion can be delivered through a catheter and implanted in an aneurysm such that elongated portion loops within the braided sack, the braided sack contacts a majority or all of the aneurysm wall, and the braided sack at least partially occludes the aneurysm neck.