Six-Sided Vascular Embolic Implant for Predictable Neck Coverage
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Solution Overview
Problem
Existing vascular implants struggle to provide predictable and reliable occlusion of aneurysms due to inconsistent detachment times and potential instability during deployment, especially in larger aneurysms, and lack sufficient neck coverage and shape memory properties.
Innovation Solution
A vascular embolic implant with a coil configuration forming six sides, including at least one large loop and multiple small loops, made of platinum tungsten alloy with shape memory properties, designed to transition smoothly between sides and detach reliably using a tether mechanism, ensuring enhanced neck coverage and predictable basket formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional coil configuration is used for vascular embolic implant, then the device can be delivered into the vascular defect, but the implant lacks predictable detachment time and stable basket formation
Solution Approach 1:
The coil is segmented into multiple loops arranged in a specific pattern to form six sides. This segmentation allows each loop to contribute to predictable detachment behavior while maintaining overall structural integrity for stable basket formation in the vascular defect.
Solution Approach 2:
The coil transitions from a one-dimensional linear configuration during delivery to a three-dimensional six-sided structure upon implantation. This dimensional transformation enables the implant to achieve both predictable detachment and stable basket formation simultaneously.
2Ease of operation
If the coil is made elongated for delivery, then it can be easily positioned into the vascular defect, but it cannot provide sufficient neck coverage and shape memory properties
Solution Approach 1:
The coil is designed with dynamic shape transformation capability, transitioning from an elongated linear shape during delivery to a three-dimensional six-sided configuration upon implantation. This dynamic transformation allows the implant to achieve both ease of delivery and sufficient neck coverage.
Solution Approach 2:
The coil's geometric parameters change from a linear elongated state during delivery to a three-dimensional expanded state with six sides upon implantation. This parameter transformation enables the implant to provide adequate neck coverage and shape memory properties while maintaining delivery ease.
3Area of stationary object
If the coil forms a three-dimensional expanded shape, then it provides better neck coverage, but it increases device complexity and manufacturing difficulty
Solution Approach 1:
The three-dimensional six-sided structure is achieved through segmentation of the coil into multiple loops arranged in specific patterns on each side. This segmentation approach maintains manufacturing feasibility while providing adequate neck coverage area.
Solution Approach 2:
The coil features asymmetric loop configurations on different sides, with at least one side containing a large loop and other sides containing multiple small loops. This asymmetric design optimizes neck coverage area while remaining manufacturable through controlled coil formation techniques.
4Ease of manufacture
If the implant uses a simple coil structure, then it is easier to manufacture, but it lacks predictable deployment and reliable occlusion
Solution Approach 1:
The coil structure transitions from a simple one-dimensional linear configuration during delivery to a three-dimensional six-sided structure upon implantation. This dimensional transformation maintains manufacturing simplicity while achieving predictable deployment and reliable occlusion through the expanded three-dimensional configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The implant achieves improved neck coverage and predictable deployment, reducing detachment time variability and instability, while effectively filling the aneurysm volume for thrombosis and occlusion without risking rupture.
Implementation Method 1
made of platinum tungsten alloy with shape memory properties, designed to transition smoothly between sides
Data Source
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Figure 3~4
Figure 5A~5F
AI summary
According to some embodiments, a vascular embolic implant (e.g., a vaso-occlusive implant or device) comprises a coil configured to assume a radially-contracted shape for delivery into a subject and configured to assume an implanted or non-elongated shape when positioned into a targeted vascular defect of the subject, wherein the coil is configured to form six sides when in the implanted or non-elongated (e.g. expanded or three-dimensional) shape, wherein at least one side formed by the implanted or non-elongated (e.g. expanded, three-dimensional or non-linear) coil comprises a large loop, and wherein at least one side formed by the implanted or non-elongated (e.g., radially-expanded) coil comprises two or more small loops.