Multi-Section Embolization Structure for Stable Vessel Occlusion
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Solution Overview
Problem
Existing implantable embolization devices face challenges in effectively anchoring and completely blocking vascular sites, particularly in high-flow environments, due to the separation of anchoring and packing functions, which can lead to displacement and incomplete occlusion.
Innovation Solution
The embolization device features multiple sections with distinct deployed configurations, including a first section for anchoring and one or more second sections for packing, along with an optional third section for additional anchoring, all with three-dimensional non-helical structures, to enhance stability and occlusion efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-structure embolization device is used, then the device structure is simple, but the device cannot simultaneously achieve secure anchoring and complete vessel blockage in high-flow conditions
Solution Approach 1:
The embolization device is divided into multiple sections with distinct functions: a first section with loops configured to anchor the device in vasculature, and one or more second sections with smaller loops configured to pack the scaffolding and obstruct the hollow anatomical structure. This segmentation allows each section to optimize its specific function, resolving the contradiction between anchoring stability and device complexity.
2Reliability
If anchoring and packing functions are combined in a single structure, then the device structure is simple, but displacement and incomplete occlusion occur in high-flow environments
Solution Approach 1:
Different sections of the device have different structural properties optimized for their specific functions. The first section has larger loops for anchoring, while the second sections have smaller loops for packing. This local differentiation of structure and function improves occlusion efficacy while managing device complexity.
3Reliability
If smaller packing sections are added to the device, then complete vessel blockage is achieved, but the device occupies larger delivery volume
Solution Approach 1:
The second sections with smaller loops are configured to nest within the scaffolding created by the first section. This nested arrangement allows multiple functional sections to be delivered through a catheter while maintaining their individual packing capabilities, achieving complete vessel blockage without excessive delivery volume.
Data Source
AI summary
In some examples, an embolization device includes multiple sections with three-dimensional non-helical structures when deployed at a vascular site. The multiple sections include a first section and one or more second sections that are smaller than the first section. The first section may have a deployed structure configured to anchor the device at a vascular site (e.g., a blood vessel) of a patient while each of the one or more second sections may be formed from loops that configured to pack and obstruct the vascular site. In some cases, the embolization device also includes a third section having a deployed configuration with multiple helical windings or loops is configured to anchor the embolization device at the vascular site.