Self-Expandable Aortic Implant for Minimally Invasive Root Reconstruction
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Solution Overview
Problem
Current surgical procedures for aortic root reconstruction and valve replacement, such as the Bentall-de Bono procedure, are invasive, time-consuming, and prone to complications, particularly in urgent cases like acute type A dissection and ascending aorta aneurysm, where rapid intervention is critical to reduce mortality.
Innovation Solution
A minimally invasive implant with a self-expandable stent frame and internal branches, designed for percutaneous deployment, which includes a replacement valve and aortic stent graft, allowing for minimally invasive treatment via arterial femoral access without the need for cardiopulmonary bypass, reducing complications and recovery time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Bentall-de Bono procedure is performed for aortic root reconstruction and valve replacement, then complete surgical repair is achieved, but treatment time is extended and complication risks increase
Solution Approach 1:
The patent combines multiple surgical functions into a single integrated implant device that simultaneously provides valve replacement, aortic root reconstruction, and coronary artery reimplantation capabilities. This merging of functions into one deployable unit eliminates the need for separate surgical steps, thereby reducing treatment time while maintaining complete surgical repair.
Solution Approach 2:
The implant is designed and prepared in advance with all components (valve, stent graft, and coronary buttons) pre-assembled and ready for deployment. This preliminary preparation allows the complex repair to be performed in a single rapid intervention rather than through multiple sequential surgical steps, reducing treatment time without compromising repair completeness.
2Reliability
If the Bentall-de Bono procedure is performed for aortic root reconstruction, then complete surgical repair is achieved, but the number of complications increases
Solution Approach 1:
The patent extracts the aortic root and valve complex as a single integrated unit that can be replaced without requiring separate anastomosis procedures for the valve, aortic root, and coronary arteries. This extraction of the entire problematic complex and replacement with a pre-assembled unit eliminates multiple surgical connection points where complications could arise.
Solution Approach 2:
The stent graft serves as an intermediary structure that facilitates the transition from open surgical repair to endovascular delivery. It provides a scaffold that allows the valve and coronary buttons to be positioned and secured without requiring direct surgical anastomosis, thereby reducing complications associated with extensive dissection and suturing.
3Reliability
If open surgical access is used for aortic root reconstruction, then complete surgical repair is achieved, but patient recovery time is extended
Solution Approach 1:
The patent replaces the mechanical open surgical approach with an endovascular delivery system. Instead of requiring thoracotomy, cardiopulmonary bypass, and direct surgical manipulation, the implant is delivered through a catheter-based system accessed via femoral artery, substituting minimally invasive mechanics for traditional open surgery mechanics while maintaining repair completeness.
Solution Approach 2:
The patent changes the access parameter from open surgical incision to percutaneous catheter access. This parameter change fundamentally alters the invasiveness of the procedure, reducing tissue trauma, bleeding, and recovery time while still achieving complete aortic root reconstruction and valve replacement through the deployed implant structure.
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
The solution significantly reduces treatment time and mortality rates for acute aortic syndromes by providing a minimally invasive alternative that minimizes complications, such as bleeding and arrhythmias, and allows for preloaded, ready-to-use devices for rapid deployment.
Implementation Method 1
a self-expandable aortic stent frame for placement at the ascending aorta arranged at a second end of the implant
Data Source
AI summary
The present invention relates to an implant for placement in a cardiac vessel, the implant being able to be expanded from an un-deployed state to an expanded state in which the implant has a larger outer diameter than in the storage state, the implant having a main body with first and second ends and a central portion arranged between the first and second ends, the central portion of the implant having a larger outer diameter than the first and second ends of the implant when the implant is in the expanded state. The invention further relates to a delivery device for an implant and to a method of delivering an implant.