Vascular Remodeling Device with Segmented Anchoring for Aneurysm Treatment
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Solution Overview
Problem
Current vascular remodeling devices struggle to effectively position and deploy at neurovascular bifurcations with aneurysms, particularly those with complex geometries, as they often herniate into parent vessels, leading to arterial occlusion and stroke risks.
Innovation Solution
An intraluminal vascular remodeling device with a tubular proximal portion, a distal portion featuring a flower or ring assembly design, and an intermediate portion, allowing for expansion and anchoring in afferent vessels while maintaining perfusion to efferent vessels, preventing herniation of embolic materials and clots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tubular remodeling devices are used to cover the neck of aneurysms, then herniation of coils is prevented, but positioning and deployment at neurovascular bifurcations with complex geometries becomes difficult
Solution Approach 1:
The remodeling device is divided into multiple sections: a proximal tubular section for anchoring in the afferent vessel, an intermediate section with struts for maintaining vessel patency, and a distal section for preventing coil herniation. This segmentation allows each section to be optimized for its specific function while facilitating easier navigation and deployment at complex bifurcation geometries.
Solution Approach 2:
Different sections of the device have different structural properties tailored to their specific functions. The proximal section has a tubular structure for anchoring, the intermediate section has struts for maintaining flow, and the distal section has a configuration for preventing herniation. This local differentiation enables the device to address multiple challenges at bifurcations simultaneously.
2Reliability
If the distal section is expanded to a further expanded state to provide scaffolding, then embolic material containment is improved, but device complexity increases
Solution Approach 1:
The distal section is designed to transition from a first expanded state to a further expanded state, changing its configuration to provide scaffolding support. This dynamic transformation allows the device to adapt its structure to better contain embolic materials while maintaining a relatively simple base design that can be controlled through the delivery system.
Data Source
AI summary
Vascular remodeling devices can include a proximal section, an intermediate section, and a distal section. During deployment, the proximal section can expand from a compressed delivery state to an expanded state and anchor the device in an afferent vessel of a bifurcation. The distal section expands from the compressed delivery state to an expanded state that may be substantially planar, approximately semi-spherical, umbrella shaped, or reverse umbrella shaped. The distal section is positioned in a bifurcation junction across the neck of an aneurysm or within an aneurysm. The intermediate section allows perfusion to efferent vessels. Before or after the device is in position, embolic material may be used to treat the aneurysm. The distal section can act as a scaffolding to prevent herniation of the embolic material. The device can be used for clot retrieval with integral distal embolic protection.