Self-Expanding Device Delivery Wire with Dual Function Bump
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Self-expanding device delivery systems with multiple members face challenges such as entanglement with deployed devices during retraction, altering the device's position, and complex manufacturing due to the need for multiple components and material usage.
Innovation Solution
A dual function delivery system with a catheter and delivery wire featuring a dual function bump member and a pusher bump member, allowing for controlled deployment and recapture of self-expanding elements by selectively engaging anchor members, reducing material complexity and manufacturing difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple members are used on the delivery wire for pushing and pulling the self-expanding device, then the device can be deployed and recaptured more effectively, but the members can get caught on the deployed device during re-sheathing and alter the device position
Solution Approach 1:
The patent extracts the problematic intermediate portion from the delivery wire by creating a bumpless section. This removal eliminates the source of entanglement with the deployed device during re-sheathing, while the retained bump members at the ends maintain the necessary push and pull functionality for deployment and recapture operations
Solution Approach 2:
The delivery wire is segmented into functional zones: bump members at the proximal and distal ends for engagement with anchor members, and a bumpless intermediate portion that prevents entanglement. This segmentation allows different sections to perform specialized functions, resolving the contradiction between operational control and position stability
2Adaptability or versatility
If multiple members are added to the delivery wire for pushing and pulling functions, then the device can be manipulated more flexibly, but the manufacturing complexity and material usage increase
Solution Approach 1:
The patent merges the pushing and pulling functions into a single delivery wire structure with strategically placed bump members. Instead of adding multiple separate components, the solution combines multiple functions into one integrated wire with bump members at specific locations, reducing manufacturing complexity while maintaining versatility
Solution Approach 2:
The delivery wire is designed as a multi-functional component that performs pushing, pulling, and positioning functions through its bump members. This universal design eliminates the need for separate components for each function, simplifying manufacturing while maintaining operational flexibility
Data Source
AI summary
A self-expanding element delivery apparatus includes a catheter having an inner lumen, a self-expanding element, and a delivery wire disposed within and extending through the inner lumen and the self-expanding element. The self-expanding element has a proximal, distal, and an intermediate portion. The element has anchor members, a compressed configuration fitting within the inner lumen, and an expanded configuration dimensioned larger than the catheter. The delivery wire also has proximal and distal portions, an intermediate portion, a dual function bump member disposed approximate to the intermediate portion, and a pusher bump member disposed approximate to the proximal portion of the delivery wire. A bump member distance between the dual function bump member and the pusher bump member is such that so that only one of the dual function bump member and the pusher bump member can contact one of the anchor members.