Prosthesis Delivery Assembly With Variable Deployment Rate Control
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Solution Overview
Problem
Existing prosthesis delivery systems lack the ability to vary deployment rates, which can affect the structure and radial force of the deployed prosthesis, limiting the ability to achieve desired deployment results.
Innovation Solution
A prosthesis delivery system with a dual action deployment assembly that allows simultaneous axial movement of the outer sheath and pusher shaft in opposing directions, and a single action deployment assembly that maintains the pusher shaft stationary, enabling variable deployment rates and controlled axial compression of the prosthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single action deployment assembly is used to retract the outer sheath while maintaining the pusher shaft stationary, then the prosthesis is deployed at a controlled rate with uniform axial compression, but the deployment time is longer and productivity is reduced
Solution Approach 1:
The system provides dynamic control over deployment rate by offering two deployment modes: single action for controlled uniform deployment and dual action for accelerated deployment. The operator can dynamically select the appropriate deployment rate based on the desired balance between deployment uniformity and deployment speed.
Solution Approach 2:
The system changes the deployment parameter (deployment rate) by providing two distinct operational modes. The single action assembly provides slow controlled deployment for uniform compression, while the dual action assembly provides fast deployment for increased productivity. This parameter change allows the system to optimize for either precision or speed depending on clinical needs.
2Productivity
If a dual action deployment assembly is used to simultaneously advance the outer sheath and pusher shaft in opposing directions, then the prosthesis is deployed at an accelerated rate with increased productivity, but the axial compression control is reduced and deployment uniformity may be compromised
Solution Approach 1:
The system provides dynamic control over deployment rate by offering two deployment modes: single action for controlled uniform deployment and dual action for accelerated deployment. The operator can dynamically select the appropriate deployment rate based on the desired balance between deployment uniformity and deployment speed.
Solution Approach 2:
The system changes the deployment parameter (deployment rate) by providing two distinct operational modes. The single action assembly provides slow controlled deployment for uniform compression, while the dual action assembly provides fast deployment for increased productivity. This parameter change allows the system to optimize for either precision or speed depending on clinical needs.
3Adaptability or versatility
If the prosthesis is deployed with variable deployment rates, then the radial force and structural density can be altered to achieve desired deployment results, but the device complexity increases due to multiple deployment assemblies
Solution Approach 1:
The delivery system is designed with multi-functionality by incorporating both single action and dual action deployment assemblies. This universal design allows the same system to perform both controlled slow deployment and accelerated fast deployment, providing versatility in deployment rate variation while managing device complexity through integrated design.
Solution Approach 2:
The system provides dynamic control over deployment rate by offering two deployment modes: single action for controlled uniform deployment and dual action for accelerated deployment. The operator can dynamically select the appropriate deployment rate based on the desired balance between deployment uniformity and deployment speed.
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 system achieves controlled deployment with varying axial compression, resulting in a prosthesis with increased radial force and structural density, enhancing its anchoring and patency within the vasculature.
Implementation Method 1
a first deployment assembly located exterior to the housing and configured to simultaneously advance the outer sheath and the pusher shaft in opposing axial directions
Implementation Method 2
As the sheath is withdrawn, the prosthesis is released from the confines of the sheath and radially self-expands so that at least a portion of the prosthesis contacts and substantially conforms to a portion of the surrounding interior of the lumen
Implementation Method 3
The self-expanding stent structure may continue to provide radial force after deployment to maintain the patency of the graft within the blood vessel and to provide the force necessary to secure the graft in the deployment location
Data Source
Figure 1A~1C
Figure 2
Figure 3A
AI summary
Devices, methods, and systems for prosthesis delivery to patient vasculature are provided. A prosthesis delivery device provided herein delivers a prosthesis to the vasculature of a patient and permits an operator to deploy the prosthesis using a single action mechanism to deploy the prosthesis at a standard deployment rate and a dual action mechanism to deploy the prosthesis at an accelerated deployment rate. Deploying the prosthesis at an accelerated deployment rate results in alterations to the deployed prosthesis structure because the prosthesis is deployed with increased axial compression that results in the prosthesis having increased radial force.