Vascular Prosthesis With Meandering Stent Rings And Side Branches
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Solution Overview
Problem
Current vascular prostheses face challenges in effectively treating thoracoabdominal aortic aneurysms, which are complex and difficult to manage, often requiring invasive procedures and complicating the reconstruction of vital organ arteries.
Innovation Solution
A self-expanding vascular prosthesis with a hollow-cylindrical base body and meandering stent rings, featuring inwardly extending side branches from fenestrations, designed to bridge the aneurysm while ensuring supply to branching lateral vessels, offering a prefabricated 'off-the-shelf' solution suitable for various patients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vascular prostheses are used to treat thoracoabdominal aortic aneurysms, then the aneurysm can be bridged, but the reconstruction of vital organ arteries becomes complicated and time-consuming
Solution Approach 1:
The vascular prosthesis is segmented into a main body and multiple side branches, each serving specific functions. The side branches are integrated into the main prosthesis structure, allowing simultaneous treatment of the aneurysm and reconstruction of vital organ arteries through a single device rather than multiple separate procedures
Solution Approach 2:
The invention merges the aneurysm exclusion function with the vessel reconstruction function into a single integrated prosthesis. The side branches are incorporated directly into the main body, combining the sealing function against the aneurysm with the patency function for organ arteries, thereby simplifying the overall intervention process
2Reliability
If complex procedures are used to reconstruct vital organ arteries, then complete treatment can be achieved, but procedural time and complexity increase
Solution Approach 1:
The side branches are pre-formed and integrated into the main prosthesis body before implantation. This preliminary configuration of the branching structure eliminates the need for complex intra-procedural shaping or attachment operations, significantly reducing procedural time while ensuring complete treatment of both the aneurysm and vital organ arteries
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
This design allows for successful bridging of thoracoabdominal aneurysms, ensuring reliable supply to branching vessels and simplifying the intervention process by providing a longer overlapping zone with connecting stents, thus reducing procedural complexity and time.
Implementation Method 1
Due to the spring action of the metal frame/framework, the vascular implant expands back into its original shape
Implementation Method 2
The wire mesh or the stent springs are usually made of a shape-memory material, usually nitinol, whereby the stent springs go back into the expanded state for release
Data Source
Figure 1~2A
Figure 2B~4C
Figure 4A~4B
AI summary
The invention relates to a vascular prosthesis for a blood vessel of a patient, comprising a hollow cylindrical main body (11), which has a main lumen (12) extending therein, and comprising a plurality of stent rings (18), which are not connected to each other and are arranged one behind the other at a distance from each other in the longitudinal direction of the vascular prosthesis (10) and extend peripherally in a meandering manner. The vascular prosthesis also has four side branches, which extend from fenestrations (26) in the prosthesis material (21) that lie between the stent rings (18) into the main lumen (12) in the distal direction.