Double-Layer Valve Prosthesis Assembly for Aortic Root Repair
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Solution Overview
Problem
Current aortic valve replacement techniques face challenges such as patient prosthesis mismatch, increased operative complexity, and risk of postoperative complications due to the need for larger valve sizes, which are not easily accommodated by existing methods like aortic root replacement or annular enlargement.
Innovation Solution
An aortic valve prosthesis assembly featuring a replacement valve with an attachment cuff and a graft that can be coupled to the valve, allowing for adjustable sizing and extension around the outer circumference to accommodate varying degrees of aortic damage, facilitating easier attachment to the aortic root or annulus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a larger valve is implanted to prevent patient prosthesis mismatch, then adequate blood flow is improved, but operative technical complexity increases
Solution Approach 1:
The patent combines the valve prosthesis and vascular graft into a single integrated assembly, where the graft is pre-attached to the valve cuff. This merging eliminates the need for separate implantation steps and complex suturing procedures, allowing larger valve sizes to be implanted without proportionally increasing operative complexity.
Solution Approach 2:
The vascular graft is pre-assembled and attached to the valve prosthesis before implantation. This preliminary action allows the surgeon to simply attach the pre-prepared assembly to the aortic root without performing complex graft suturing during the procedure, thereby reducing operative technical complexity while enabling larger valve sizes.
2Reliability
If a larger valve is implanted to prevent patient prosthesis mismatch, then adequate blood flow is improved, but risk of postoperative complications increases
Solution Approach 1:
By combining the valve and graft into one assembly with standardized attachment dimensions, the patent reduces the risk of mismatch and improper fitting that could lead to postoperative complications such as paravalvular leaks or graft dissection, while still allowing adequate blood flow through larger valve sizes.
3Reliability
If a larger valve is implanted to prevent patient prosthesis mismatch, then adequate blood flow is improved, but operative time increases
Solution Approach 1:
The vascular graft is pre-attached to the valve prosthesis in the manufacturing process, eliminating the time-consuming step of suturing the graft to the valve during surgery. This allows larger valve sizes to be implanted without proportionally increasing operative time, as the complex graft attachment has already been performed factory-prepared.
4Adaptability or versatility
If a larger valve is implanted to facilitate future transcatheter aortic valve replacements, then future intervention options are improved, but operative technical complexity increases
Solution Approach 1:
The pre-assembled valve-graft configuration with standardized dimensions facilitates future TAVR procedures by ensuring adequate space and proper positioning, while the simplified implantation process reduces the technical complexity barrier for achieving this future adaptability.
Data Source
AI summary
A valve prosthesis assembly is disclosed. The valve prosthesis assembly comprises a replacement valve including an attachment cuff, an inner layer graft and an outer layer graft coupled to the replacement valve at the attachment cuff. The replacement valve includes a first side and a second side opposite the first side, and the inner layer graft and the outer layer graft define a chamber therebetween adjacent to the first side of the replacement valve.