Modular Prosthesis Delivery Handle with Rotating Trigger Rings
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Solution Overview
Problem
Existing prosthesis delivery devices lack versatility in deploying a wide range of prostheses and require complex assembly processes, limiting their effectiveness and efficiency in medical procedures.
Innovation Solution
A modular handle assembly with trigger wire actuation mechanisms allows for the deployment of various prostheses, including cuffs, single lumen tubular stent grafts, bifurcated AAA stent grafts, and branched or fenestrated stent grafts, through standardized interfaces that facilitate multiple delivery approaches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-design delivery device is used, then the device structure is simple, but it cannot deploy a wide range of prostheses
Solution Approach 1:
The delivery device is divided into modular components including a handle assembly, delivery catheter, and deployable prosthesis. The handle assembly itself is segmented into multiple independently rotatable rings (first ring, second ring, third ring) that can be configured in different sequences, allowing the same basic structure to adapt to various prosthesis types without requiring complete redesign.
Solution Approach 2:
The handle assembly is designed with universal functionality to deploy multiple prosthesis types (aortic cuffs, tubular stent grafts, bifurcated stent grafts, branched stent grafts, fenestrated stent grafts) using the same basic mechanism. The standardized interfaces and modular ring configuration enable one device to perform multiple deployment functions across different anatomical scenarios.
2Adaptability or versatility
If a customized delivery device is designed for each prosthesis type, then the adaptability is high, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The handle assembly employs dynamic, reconfigurable ring structures that can be assembled in different sequences (e.g., first ring proximal to second ring, or first ring distal to second ring) depending on the prosthesis type. This dynamic reconfiguration capability allows a single standardized handle design to adapt to multiple prosthesis configurations without requiring custom manufacturing for each application.
Solution Approach 2:
The device allows parameter changes in configuration through different ring arrangements and orientations. By changing the spatial parameters and assembly sequence of the modular rings, the same handle assembly can be optimized for different prosthesis deployment scenarios, eliminating the need for custom-designed devices for each prosthesis type.
3Reliability
If multiple separate delivery devices are used for different prostheses, then each device is optimized for its specific prosthesis, but the overall system complexity and cost increase
Solution Approach 1:
Multiple delivery functions that would traditionally require separate devices are merged into a single handle assembly. The combined system includes multiple rotatable rings, trigger wires, and release mechanisms that can collectively deploy various prosthesis types, reducing the total number of devices needed while maintaining deployment reliability through standardized interfaces and consistent mechanical principles.
Data Source
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AI summary
A handle assembly for a prosthesis delivery device is disclosed. The handle assembly comprises a stationary main handle (10) having a proximal end and a distal end and an outer surface extending therebetween. A first helical groove is formed in at least a portion of the outer surface of the main handle and a first trigger wire actuation mechanism disposed about the main handle (10) and rotatably moveable relative to the main handle. A first trigger wire is operatively connected to the first trigger wire actuation mechanism, the first trigger wire having a prosthesis capture condition and a prosthesis release condition. Movement of the first trigger wire actuation mechanism causes movement of the first trigger wire thereby moving the first trigger wire from the prosthesis capture condition to the prosthesis release condition. Additional trigger wire actuation mechanisms operatively connected to one or more additional trigger wires may also be disposed about the main handle (10).