Vascular Prosthesis Fenestration Mesh for Tear-Free Side Branch Openings
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Solution Overview
Problem
Existing intraluminal vascular prostheses require precise customization to form fenestrations for branching vessels, risking material tearing and uncontrolled blood outflow due to the need for precise positioning.
Innovation Solution
An intraluminal vascular prosthesis with a fenestration area featuring a lower mesh density and grid-like reinforcing elements, allowing fenestrations to be created without damaging the material using expansion elements like catheters or guide wires, ensuring controlled openings for lateral vessels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fenestrations are formed by penetrating the prosthesis material with expansion elements, then openings for lateral vessels can be created, but the prosthesis material may tear or be damaged leading to uncontrolled blood outflow
Solution Approach 1:
The patent applies local quality by providing a fenestration area with differentiated mesh density. The fenestration area has a lower mesh density compared to the surrounding prosthesis material, making it more compliant and suitable for penetration by expansion elements. This localized structural variation allows fenestrations to be created without damaging the overall material integrity, as the lower mesh density area can deform and recover without tearing.
2Manufacturing precision
If the prosthesis is precisely customized for each patient to achieve successful treatment, then fenestrations can be accurately positioned, but the device complexity and manufacturing requirements increase
Solution Approach 1:
The patent applies universality by designing a standardized prosthesis structure with a dedicated fenestration area that can accommodate multiple different fenestration configurations. The fenestration area is designed with specific structural characteristics (lower mesh density) that make it universally suitable for creating openings of various sizes and positions. This allows the same prosthesis design to be used for different patients and vessel configurations without requiring complete customization, reducing device complexity while maintaining positioning accuracy.
Data Source
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AI summary
The present invention relates to an intraluminal vascular prosthesis (10; 60; 70) for implantation in a blood vessel with rings (12) arranged one behind the other in its longitudinal direction and made of meandering peripheral supports (13) and a prosthesis material ( 14). The prosthesis material has at least one fenestration area (16) for forming at least one opening (22) for outgoing side branches (20; 61, 62, 63), the prosthesis material (14) in the fenestration area (16) having a smaller Mesh density than in the rest of the prosthesis material (14), and lattice-like reinforcement elements (18). (Fig.1)