Composite Aortic Annular Support with Resilient Band
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Solution Overview
Problem
Current aortic valve repair techniques, such as the David Reimplantation and Yacoub Remodeling procedures, face challenges in stabilizing the aortic annulus, leading to potential annular dilation and compromised valve physiology due to the lack of radial compliance and dynamic motion preservation.
Innovation Solution
A composite aortic annular support apparatus comprising a semi-rigid section and a resiliently deformable section, along with an external resilient band, is positioned internally and externally to provide stabilization and adapt to the non-planar geometry of the aortic annulus, allowing for optimized annular reduction and preservation of dynamic motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid annular support ring is used to stabilize the aortic annulus, then annular dilation is prevented, but the natural dynamic motion and radial compliance of the annulus are compromised
Solution Approach 1:
The annular support ring is divided into multiple segments or struts that can independently move relative to each other, allowing the structure to maintain stability while adapting to the dynamic motion of the aortic annulus during cardiac cycles
Solution Approach 2:
The support apparatus incorporates dynamic elements such as articulated joints, flexible materials, or shape memory alloys that enable the rigid structure to adapt its configuration in response to physiological movements, preserving radial compliance while maintaining annular stabilization
2Reliability
If the aortic annulus is resized through surgical procedures, then valve coaptation is improved, but the complexity and risk of the surgical procedure increase
Solution Approach 1:
The annular support ring is pre-shaped to the desired annular dimensions before implantation, allowing the surgeon to simply deploy the pre-configured device rather than performing complex reshaping maneuvers during surgery
Solution Approach 2:
The support ring acts as an intermediary device that provides a stable framework for valve repair, simplifying the surgical procedure by replacing complex tissue reshaping with device deployment while still achieving proper valve coaptation
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 support apparatus effectively reduces and prevents further annular dilatation, enhances long-term outcomes by providing strength and stability, and preserves the natural motion of the aortic annulus during the cardiac cycle, improving valve function and durability.
Implementation Method 1
a resiliently deformable section, along with an external resilient band, is positionable outside the aortic root at the level of external dissection and is securable to the ring through the aortic annulus
Implementation Method 2
The resilient band is positionable outside the aortic root at the level of external dissection and is securable to the ring through the aortic annulus for providing additional support to the aortic annulus
Data Source
AI summary
A two-part aortic annular support system for supporting an aortic annulus during aortic valve repair procedures for prevention of further annular dilation. The first part comprises a composite annular ring that is positionable from within an aortic valve into the left ventricular outflow tract at the level of annular plane. The composite ring comprises a semi-rigid section and a resiliently deformable section. The semi-rigid section is shorter in length than the deformable section. The deformable section is extendible into a commissure of the aortic valve. The second part is a resilient band that is positionable external to the aortic root. The resilient band is securable to the composite ring through the aortic annulus by suturing. The present disclosure also relates to a use of the aortic annular support system and a method of inserting and securing the aortic annular support system during a surgical intervention.