Endoluminal Prosthesis Curved Side Tube Branch Vessel Cannulation
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Solution Overview
Problem
Conventional endoluminal prostheses struggle with cannulation of branch vessels that have atypical structural relationships to the main vessel, such as unusual branching angles or proximity to anatomical features like heart valves, making it difficult to maintain blood flow to these vessels during endovascular treatment.
Innovation Solution
The development of an endoluminal prosthesis with curved side tubes that provide a pre-defined curved shape, allowing for improved alignment and cannulation of branch vessels, even those with atypical anatomical relationships. These side tubes include internal and external portions with reinforcement members and radiopaque markers for enhanced guidance during deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional endoluminal prostheses with straight side tubes are used, then the device structure is simple and easy to manufacture, but cannulation of branch vessels with atypical anatomical relationships is difficult
Solution Approach 1:
The side tube is configured with a curved shape instead of a straight configuration, allowing it to navigate atypical anatomical relationships between the main vessel and branch vessels. The curvature enables the side tube to follow the natural angulation of branch vessels while maintaining structural integrity and facilitating successful cannulation.
2Ease of operation
If the side tube extends far into the main lumen to improve alignment with atypical branch vessels, then cannulation capability improves, but the risk of interfering with main vessel flow and heart valve function increases
Solution Approach 1:
The side tube features localized reinforcement members (such as stents or mesh structures) at specific segments, particularly at the curved portion and outlet region. This localized reinforcement provides structural support where needed for alignment and cannulation while maintaining flexibility and minimizing interference with main vessel flow in other regions.
3Adaptability or versatility
If a curved side tube is implemented to accommodate atypical branch vessel anatomy, then cannulation of atypical vessels is improved, but manufacturing complexity and precision requirements increase
Solution Approach 1:
The side tube is pre-formed with the desired curved configuration during the manufacturing process, allowing it to assume the correct anatomical alignment upon deployment. This pre-shaping eliminates the need for complex post-deployment adjustments and ensures consistent geometric precision across multiple devices while maintaining adaptability to atypical anatomies.
Data Source
AI summary
An endoluminal prosthesis includes a main tubular body having an external surface and defining a main lumen and at least one curved side tube having an internal portion disposed within the main lumen and an external portion extending along a curvilinear path on the external surface of the main tubular body. A portion of an expandable stent attached to the external surface of the main tubular body is disposed radially outward of and attached to the external portion of the curved side tube.