Self-Expanding Framing Member for Minimally Invasive Valve Delivery
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Solution Overview
Problem
Current methods for implanting prosthetic valves, especially in cardiac and venous systems, often require invasive open surgical procedures, which are risky and not suitable for all patients, particularly the elderly, and existing prosthetic valves can cause blood clot formation or be in short supply.
Innovation Solution
A catheter-based apparatus with a self-expanding framing member and target points for precise delivery and placement of prosthetic structures, such as valves, within body lumens, allowing for minimally invasive procedures and reducing the risk of blood clot formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open surgical procedures are used for implanting prosthetic valves, then reliable valve replacement is achieved, but surgical risks and patient trauma increase
Solution Approach 1:
The patent replaces traditional open surgical mechanical procedures with a catheter-based delivery system that uses a self-expanding framing member to deploy prosthetic valves through minimally invasive percutaneous access, eliminating the need for open surgical incisions and reducing surgical trauma
Solution Approach 2:
The patent introduces a catheter-based delivery system as an intermediary mechanism between the operator and the target valve site, allowing prosthetic valves to be delivered through a minimally invasive percutaneous approach rather than requiring direct open surgical access to the heart or vessels
2Reliability
If traditional prosthetic valves are used, then valve replacement is achieved, but blood clot formation occurs
Solution Approach 1:
The patent modifies the surface characteristics and material properties of the prosthetic valve by coating it with biological tissue layers, changing the physical and chemical parameters of the valve surface to reduce thrombogenicity and improve blood compatibility
Solution Approach 2:
The patent creates a composite structure by coating the prosthetic valve with biological tissue layers, combining the mechanical strength of the synthetic valve framework with the blood-compatible properties of biological materials to reduce clot formation
3Manufacturing precision
If precise valve placement is required, then accurate positioning is achieved, but delivery system complexity increases
Solution Approach 1:
The patent employs a self-expanding framing member that dynamically transitions from a compressed delivery state to an expanded functional state at the target site, using elastic memory properties to automatically achieve proper valve expansion and positioning without complex deployment mechanisms
Solution Approach 2:
The self-expanding framing member utilizes its own elastic memory properties to automatically expand and position the prosthetic valve at the target site without requiring complex external deployment mechanisms, making the system self-actuating and reducing overall device complexity
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
Enables minimally invasive delivery and placement of prosthetic structures, reducing surgical risks and avoiding blood clot issues, while providing a flexible solution for various prosthetic needs within the body.
Implementation Method 1
A framing member has a collapsed condition in which the framing member is adapted for insertion into the body lumen through the catheter lumen and an expanded condition in which the framing member is adapted for placement within the body lumen
Data Source
AI summary
An apparatus for delivering an implanted structure to a desired target site within a body lumen of a patient includes a catheter having a longitudinally extending catheter lumen and adapted to provide access to the body lumen. A framing member has a collapsed condition in which the framing member is adapted for insertion into the body lumen through the catheter lumen and an expanded condition in which the framing member is adapted for placement within the body lumen. At least one target point is carried by the framing member and is adapted for placement adjacent the desired target site. A holding mechanism is carried by the framing member and is adapted to releasably grasp the implanted structure. At least one target pathway is attached to at least one target point. At least a portion of the target pathway extends through the catheter lumen.