Autologous Granulation Tissue Valve for Venous Insufficiency
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Solution Overview
Problem
Current prosthetic valves for cardiac and venous systems are limited in their effectiveness and durability, often requiring replacement of native valves and can lead to complications such as chronic venous insufficiency and varicose vein syndrome due to incompetence or damage, with existing solutions being difficult to perform and not always suitable for all patients.
Innovation Solution
The development of prosthetic valve leaflets made from isolated granulation tissue formed in a body location other than where they are to be implanted, using a cusp-forming device inserted into a body cavity to grow tissue, which can be decellularized and adapted for implantation within vascular passageways, potentially avoiding immunological rejection and improving fluid flow dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prosthetic valves are made from synthetic materials or animal tissue, then valve replacement can be performed, but immunological rejection and complications such as chronic venous insufficiency occur
Solution Approach 1:
The patient's own body is used to generate the valve tissue through granulation tissue formation in a body cavity, eliminating the need for external synthetic materials or animal tissue that would cause immunological rejection
Solution Approach 2:
A cusp-forming device is inserted into a body cavity to serve as a scaffold for granulation tissue formation, which then becomes the valve tissue itself, mediating between the patient's body and the final valve implant
2Reliability
If native valves are removed and replaced with prosthetic valves, then valve dysfunction is treated, but the complexity of surgery increases and not all patients are suitable candidates
Solution Approach 1:
The valve tissue is pre-formed in a body cavity through granulation tissue formation before implantation, allowing for simplified surgical deployment of the complete valve structure without complex reconstruction procedures
Solution Approach 2:
The natural valve structure is replicated by forming granulation tissue on a cusp-forming device that mimics the geometry of native valve cusps, creating an autologous copy of the valve structure
3Reliability
If prosthetic valves are implanted to prevent retrograde blood flow, then venous valve incompetence is treated, but chronic venous insufficiency and varicose vein syndrome can still occur
Solution Approach 1:
The physical and biological parameters of the valve tissue are changed by using living granulation tissue that can adapt and integrate with the patient's vascular system, improving long-term functionality and reducing complications
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
This approach allows for the creation of autologous or allogenic tissue valves that can be implanted with reduced risk of rejection and improved functionality, enhancing blood flow and reducing the need for native tissue removal, thus addressing the limitations of existing prosthetic valves.
Implementation Method 1
isolated granulation tissue formed in a peritoneal cavity
Data Source
AI summary
Described are implantable prosthetic valve devices comprising isolated granulation tissue. Also described are methods of treatment that include implanting at least one of these valves within a body passageway of a patient, for example, within a vein to treat venous insufficiency.