Retrievable Prosthesis Delivery System with Shaft Stop Mechanism
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Solution Overview
Problem
Current methods for treating mitral regurgitation, such as surgical techniques and implantable devices, often require lengthy recovery periods and have varying clinical results, and there is a need for improved devices and methods that can effectively address the challenges of delivering prosthetic valves to the heart while navigating obstructed or tortuous paths and ensuring optimal placement.
Innovation Solution
A prosthetic mitral valve with a self-expanding or expandable anchor portion and a delivery system that allows for transapical or transseptal delivery, featuring a prosthetic valve with a tricuspid tissue-type structure, adjustable leaflets, and a delivery system with controls for precise deployment and anchoring, including a steering guide and tether management to ensure accurate positioning and prevent inadvertent deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surgical techniques are used to treat mitral regurgitation, then effective treatment is achieved, but recovery period is lengthy
Solution Approach 1:
The patent replaces traditional open surgical techniques with a minimally invasive catheter-based delivery system. The prosthesis is delivered through a catheter inserted via the femoral vein, eliminating the need for open heart surgery and extensive incisions, thereby significantly reducing recovery time while maintaining treatment effectiveness
Solution Approach 2:
The delivery catheter serves as an intermediary tool to transport the prosthesis from the access site through the vascular system to the target location. This intermediary mechanism enables minimally invasive delivery, avoiding direct surgical intervention and reducing recovery requirements
2Loss of time
If minimally invasive delivery methods are used, then recovery time is reduced, but delivery precision through obstructed paths becomes challenging
Solution Approach 1:
The delivery system incorporates imaging guidance and real-time feedback mechanisms that allow the operator to monitor the prosthesis position and delivery catheter trajectory. This feedback enables precise control and adjustment during delivery through obstructed paths, ensuring accurate placement while maintaining minimally invasive approach
Solution Approach 2:
The delivery catheter system provides dynamic control mechanisms including adjustable positioning and deployment timing. The operator can control the expansion timing and position of the prosthesis anchor portion dynamically during the delivery process, enabling precise placement even through complex anatomical paths
3Adaptability or versatility
If prosthesis is delivered through obstructed paths, then access to target area is achieved, but risk of inadvertent deployment increases
Solution Approach 1:
The delivery system incorporates preliminary locking mechanisms and controlled expansion designs. The prosthesis anchor portion is pre-configured to expand only when specific deployment conditions are met, preventing inadvertent deployment during navigation through obstructed paths while maintaining the ability to access target areas
Data Source
AI summary
A prosthetic delivery system may include a plurality of concentric shafts and an actuator mechanism for actuating one or more of the concentric shafts. A stop mechanism may be coupled to the actuator mechanism. The stop mechanism prevents advancement or retraction of at least some of the shafts beyond a predetermined position unless the stop mechanism is released. A second stop mechanism may be included in the system for controlling another of the shafts. A plurality of filaments may be coupled to a prosthesis carried by the delivery system and actuation of the filaments may be used to control deployment or retrieval of the prosthesis.