Vascular Prosthesis Transition Section for Aortic Bifurcation Placement
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Solution Overview
Problem
Current intraluminal vascular prostheses for aortic bifurcation treatment require a second guidewire for precise placement of the contralateral leg, which is complicated by two-dimensional imaging and geometric arrangements, leading to time-consuming probing procedures.
Innovation Solution
An intraluminal vascular prosthesis with a hollow-cylindrical base body featuring a transition section with a decreasing diameter, made of prosthesis material with a different tissue structure and grid-like reinforcement elements, allowing for easy penetration to create an opening for the contralateral leg, simplifying the placement process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a second guidewire is used for precise placement of the contralateral leg, then placement precision is improved, but the probing procedure becomes time-consuming and complex
Solution Approach 1:
The patent introduces a transition section with a specific fabric structure and grid-like reinforcement elements as an intermediary feature. This transition section serves as a mediator that facilitates the placement of the contralateral leg by providing a distinguishable anatomical landmark and a controlled penetration path, eliminating the need for complex two-wire probing procedures while maintaining placement precision
Solution Approach 2:
The transition section possesses locally differentiated properties including a different fabric structure and grid-like reinforcement elements compared to the rest of the prosthesis body. This local quality differentiation creates a distinguishable region that guides wire placement and simplifies the probing procedure, allowing operators to identify the correct penetration point without time-consuming complex procedures
2Ease of manufacture
If the prosthesis material is made uniform throughout, then manufacturing is simplified, but the ability to facilitate easy penetration for opening creation is reduced
Solution Approach 1:
The prosthesis employs local quality differentiation by equipping the transition section with a different fabric structure and grid-like reinforcement elements compared to other sections. This localized structural variation facilitates easy penetration and opening creation at the transition section while maintaining the integrity and uniform manufacturing process of the overall prosthesis
3Strength
If the transition section has reinforced fabric structure, then structural integrity is improved, but penetration difficulty increases
Solution Approach 1:
The transition section features a different fabric structure with grid-like reinforcement elements that provide localized structural support. This local reinforcement maintains structural integrity at the transition section while the specific configuration of the grid-like elements and fabric structure still allows for controlled penetration, balancing strength and penetrability
4Ease of manufacture
If the prosthesis diameter is constant throughout, then manufacturing is simplified, but the ability to adapt to aortic bifurcation geometry is reduced
Solution Approach 1:
The prosthesis incorporates a transition section with a different fabric structure and grid-like reinforcement elements that allows for dynamic adaptation to the aortic bifurcation geometry. This transition section enables the prosthesis to morph from a uniform cylindrical structure to one that accommodates the branching anatomy, improving anatomical adaptation while maintaining manufacturability
Data Source
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AI summary
The present invention relates to an intraluminal vascular prosthesis (10) to be implanted into a blood vessel, especially into the aortic bifurcation. The vascular prosthesis (10) has a hollow cylindrical base (11) with a proximal opening (12), a distal opening (14) and at least one first (16) and one second (18) portion, and with a transition portion (28) between the first (16) and the second (18) portion. Said transition portion has a diameter which continuously decreases from proximal to distal and comprises a less tear-resistant fabric structure (26) with lattice-like reinforcing elements (32) secured and/or applied thereto.