Double-Layer Blood Vessel Stent Accurate Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing double-layer blood vessel stents face challenges in accurate positioning due to their complex structure, which can lead to poor adhesion and incomplete closure with the vessel wall, especially when individual differences and calcified plaques are present.
Innovation Solution
A double-layer blood vessel stent design incorporating a main body stent, a skirt-sided stent with a tapered and extending section, and a marker member with specific marker portions to facilitate accurate positioning and full release within the vessel, utilizing a marker member to observe and ensure proper alignment during deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a double-layer blood vessel stent is used to improve deformability and adhesion, then the anchoring force and adhesion to vessel wall are improved, but the structural complexity increases making accurate release difficult
Solution Approach 1:
The stent is divided into two independent layers: a main body stent providing radial support and a skirt-sided stent providing deformability and adhesion. Each layer can be independently designed, manufactured, and deployed, allowing the complex double-layer structure to be managed through modular segmentation while maintaining improved overall performance
Solution Approach 2:
The skirt-sided stent is nested within the main body stent during deployment, with the skirt-sided stent positioned inside the main body stent lumen. This nested configuration allows the complex double-layer structure to be compactly stored and deployed systematically, reducing the complexity of accurate release by establishing a clear spatial relationship between layers
2Adaptability or versatility
If a skirt-sided stent with better deformability is added to improve adhesion, then the anchoring capability is improved, but the difficulty of accurate release increases
Solution Approach 1:
The skirt-sided stent is pre-formed with a tapered section and extending section configuration before deployment. This preliminary shaping allows the stent to automatically assume the correct spatial relationship with the main body stent upon release, simplifying the release operation while ensuring accurate positioning of the deformable skirt-sided stent within the vessel lumen
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
A double-layer blood vessel stent. A skirt-sided stent is provided on a main body stent. A first developing member and a second developing member are provided on the main body stent. The first developing member includes a first developing portion and a second developing portion, where the first developing portion and the second developing portion are flush with a free end at a position where the distance between the intersections on a plane perpendicular to the direction of an axis of the main body stent is the minimum distance; and an end, away from a first end, of the second developing member is flush with an end away from a tapered section of an extending section. This structure allows for accurate positioning of the double-layer vessel stent.