Bifurcation Aneurysm Implant With Variable Porosity Access
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Solution Overview
Problem
Existing medical implants for treating vascular lesions in bifurcations, such as aneurysms, face challenges in effectively treating the lesion while maintaining access to the vessel and diverting blood flow, often restricting interventional accessibility.
Innovation Solution
A compressible and expandable medical implant with a conical proximal section and tubular distal section, featuring varying porosities and a concave design to allow access and divert blood flow, anchored securely in the vessel bifurcation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flow diverter is used to treat the lesion, then the lesion can be covered and blood flow diverted, but interventional accessibility to the vessel is restricted
Solution Approach 1:
The support body features variable porosity along its length: the proximal section has higher porosity (first porosity) to allow microcatheter passage and maintain accessibility, while the distal section has lower porosity (second porosity) to effectively divert blood flow from the lesion. This local differentiation of structural properties resolves the contradiction between accessibility and lesion coverage.
Solution Approach 2:
The support body is divided into functionally distinct segments: a proximal section for maintaining vessel accessibility with higher porosity, and a distal section for lesion coverage with lower porosity. This segmentation allows each portion to optimize its function independently, resolving the accessibility-coverage trade-off.
2Reliability
If the support body is made dense to divert blood flow effectively, then lesion coverage improves, but access for delivery devices is hindered
Solution Approach 1:
The support body features variable porosity along its length: the proximal section has higher porosity (first porosity) to allow microcatheter passage and maintain accessibility, while the distal section has lower porosity (second porosity) to effectively divert blood flow from the lesion. This local differentiation of structural properties resolves the contradiction between accessibility and lesion coverage.
3Reliability
If the proximal section is positioned to cover the lesion, then lesion treatment is effective, but the opening angle must be precisely controlled
Solution Approach 1:
The proximal section is designed with a conical geometry featuring a specific opening angle relative to the longitudinal axis. This conical shape naturally conforms to the bifurcation anatomy and vascular wall curvature, providing self-aligning properties that reduce the sensitivity to precise opening angle control during manufacturing and deployment.
Data Source
AI summary
A medical implant for the treatment of a bifurcation aneurysm, with a support body that is compressible and expandable, wherein the support body includes a proximal section and a distal section which are connected to each other, wherein the distal section is tubular for anchoring in the vessel, and the proximal section is conical and has an opening angle in relation to the longitudinal axis of the support body, so the proximal section can be positioned in the vessel such that the lesion can be at least partially covered, and the proximal section has a first and a second porosity, wherein the first porosity is greater than the second porosity so that in the implanted state, the vessel and/or the lesion is accessible through the first porosity with a microcatheter, and the blood flow through the second porosity can be at least partially diverted from the lesion.