Prosthesis Deployment System Positioning Member Flare
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Solution Overview
Problem
Current medical device systems for deploying prostheses in vessel lumens require complex manipulation of multiple handles and components, which can be cumbersome and inefficient, especially when dealing with various types of prostheses and delivery approaches.
Innovation Solution
A prosthesis deployment system featuring a positioning member that inhibits the tip body segment from moving relative to an enlarged body, utilizing a flareable wire member that moves radially outward to lock the tip assembly in place, allowing for controlled expansion and deployment of prostheses within vessel lumens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple handles and pin vises are used to manipulate components during prosthesis deployment, then the prosthesis can be deployed with various types and delivery approaches, but the operation becomes cumbersome and complex
Solution Approach 1:
The patent combines multiple manipulation functions into a single handle assembly. The operator manipulates one handle to simultaneously control the inner cannula, outer cannula, and positioning member, eliminating the need for multiple separate handles and pin vises while maintaining the ability to deploy various prosthesis types
2Productivity
If the tip body segment is allowed to move relative to the enlarged body during deployment, then the prosthesis can expand freely, but the risk of device snaging increases
Solution Approach 1:
The positioning member transitions from a constrained state during delivery to an extended state during deployment. It is initially received within the tip body segment to allow smooth delivery, then extends outward to inhibit relative movement between the tip body segment and enlarged body during prosthesis expansion, reducing snagging risk while maintaining expansion efficiency
3Ease of operation
If the positioning member is extended outward to inhibit relative movement, then control during deployment is improved, but the device complexity increases
Solution Approach 1:
The positioning member is nested within the tip body segment during delivery, similar to a doll inside a doll. This nested configuration allows the positioning member to be stored compactly without adding significant complexity to the overall device structure, while still providing the necessary control function when extended during deployment
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 solution simplifies the deployment process by reducing the need for complex handle manipulation, enabling efficient expansion and secure positioning of prostheses, facilitating a wide range of prosthesis types and delivery approaches with improved control and reduced risk of device snagging during withdrawal.
Implementation Method 1
The positioning member is deployable when the enlarged body is at a position corresponding to the edge of the tubular segment. The positioning member may be a flareable wire member having a member end coupled to the enlarged body and extending toward the tip body segment. The flareable wire member is radially movable about the member end between a nondeployed configuration and a deployed configuration.
Data Source
Figure 1
Figure 2~4
Figure 5~7
AI summary
A prosthesis deployment system (1) has a positioning member (40) at least partially disposed within a tubular segment (21) of a tip assembly (18), the positioning member being movable between nondeployed and deployed configurations. In the nondeployed configuration the positioning member permits the tip assembly to move relative to an enlarged body assembly (35). When an enlarged body (22) is at a position farther away from a tip body, e.g. at the edge of the tubular segment, the positioning member (40) can move or flare to its deployed configuration to inhibit the enlarged body from moving relatively closer to the tip assembly. Axial force applied to the tip assembly during withdrawal of the tip assembly can be transmitted via the positioning member to the enlarged body assembly to facilitate its withdrawal from the body.