Percutaneous Vascular Prosthesis with Expandable Fastener Deployment
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Solution Overview
Problem
Current treatments for venous valve insufficiency, such as varicose veins, are inadequate due to discomfort, invasive surgical methods, and risks associated with external compression and surgical procedures, necessitating a more effective and less invasive solution for securing prosthetic devices within the vasculature to address venous reflux.
Innovation Solution
A medical product featuring a percutaneous device with an expandable portion and fasteners that secure a vascular prosthesis within a bodily vessel by expanding the device to anchor the prosthesis, reducing blood reflux through the deployment of fasteners into patient tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic stockings are used to apply external pressure to the vein, then the leaflets are forced into apposition to treat venous valve insufficiency, but the patient experiences physical discomfort and psychological distress requiring constant wear
Solution Approach 1:
The patent extracts the function of forcing valve leaflets into apposition from the external elastic stocking and transfers it to an internal prosthesis with fasteners. The prosthesis is implanted within the vein to directly secure the leaflets, eliminating the need for external compression and the associated discomfort and compliance issues.
Solution Approach 2:
The patent introduces a prosthesis with fasteners as an intermediary device between the vein wall and the valve leaflets. This intermediary structure provides mechanical support to keep the leaflets in apposition without requiring external compression, thereby treating the underlying cause while avoiding the side effects of elastic stockings.
2Reliability
If surgical methods such as vein stripping and ligation are used to treat venous valve insufficiency, then the incompetent veins are removed or constricted, but the patient experiences long recovery time, scarring, and surgical risks
Solution Approach 1:
The patent replaces the mechanical surgical system (incisions, stripping, ligation) with a minimally invasive percutaneous delivery system. The prosthesis is delivered through a catheter inserted through a small puncture site, avoiding large incisions and extensive surgical manipulation, thereby dramatically reducing recovery time and surgical risks while maintaining treatment effectiveness.
Solution Approach 2:
The patent uses a flexible prosthesis structure that can be compressed within a delivery catheter and then expanded at the target site. This flexible design allows the prosthesis to navigate through the vasculature and deploy within the vein without requiring surgical exposure, enabling minimally invasive treatment with quick recovery.
3Reliability
If surgical constriction methods such as implanting frames or placing sutures are used to treat venous valve insufficiency, then the vein is constricted to bring leaflets into closer proximity, but the procedure requires incisions and carries surgical risks
Solution Approach 1:
The patent replaces the mechanical surgical constriction system with a percutaneously delivered prosthesis. The prosthesis is inserted through a small puncture and deployed within the vein to provide constriction and support, eliminating the need for incisions and associated surgical risks while achieving the same functional outcome of bringing valve leaflets into proximity.
4Reliability
If fasteners are arranged over an expandable portion of a delivery device, then the fasteners can be delivered into the prosthesis to secure it within the vessel, but the device complexity increases
Solution Approach 1:
The patent merges the fastener delivery mechanism with the expandable prosthesis structure itself. The fasteners are integrated onto the expandable portion of the delivery device, and upon expansion, the fasteners are automatically positioned and delivered into the prosthesis to secure it. This integration reduces the need for separate complex delivery mechanisms while ensuring reliable prosthesis securement.
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 method provides a minimally invasive and effective solution for securing prosthetic devices within the vasculature, reducing blood reflux and improving venous function, thereby treating venous valve insufficiency with reduced discomfort and risk compared to existing methods.
Implementation Method 1
a percutaneous device having an expandable portion... expanding the device to anchor the prosthesis
Data Source
AI summary
Provided are methods, devices, and systems that can be used to deploy prosthetic devices within a bodily lumen of a patient. These methods and devices can include the securement of a prosthetic valve within a vascular lumen by driving one or more fasteners from a position on an expandable device through the valve and into or through a vascular wall.