Expandable Vessel Occlusion Removal Device with Phase-Differenced Wire Mesh
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Solution Overview
Problem
Current devices for removing obstructions from blood vessels, such as clots, face challenges in effectively capturing and extracting obstructions due to limitations in design and functionality, particularly in navigating complex vessel geometries and maintaining contact with vessel walls during expansion and contraction.
Innovation Solution
An expandable device with a tubular mesh structure formed by wires, where wire pairs with phase differences create radial and axial spaces to capture and hold obstructions, allowing for expansion and contraction to navigate vessel changes while maintaining contact with vessel walls, facilitating the removal of obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device is expanded to increase radial spaces for capturing obstructions, then the capture capability is improved, but the device complexity and difficulty of navigation through vessel changes increases
Solution Approach 1:
The device is divided into multiple wire pairs (first, second, third wire pairs) that can be independently configured with different phase differences. Each wire pair acts as an independent unit for creating spaces, allowing the device to capture obstructions while maintaining navigability through segmented functional units rather than a monolithic complex structure
Solution Approach 2:
The device utilizes dynamic phase differences between wire pairs that can be adjusted during operation. The phase difference between wire pairs is configured to be different, enabling the spaces to dynamically adapt their configuration - expanding radially to capture obstructions and contracting to navigate vessel geometry changes, thus resolving the contradiction between capture capability and navigability
2Ease of manufacture
If the device structure is simplified for easier manufacture, then the ease of manufacture is improved, but the ability to maintain contact with vessel walls during expansion and contraction deteriorates
Solution Approach 1:
The invention changes the geometric parameters of the wire configuration by introducing phase differences between wire pairs. This parameter change creates variable spaces that can expand and contract while maintaining contact with vessel walls, achieving reliable contact maintenance through mathematical/geometric optimization rather than complex mechanical structures, thus improving ease of manufacture while maintaining reliability
3Strength
If the wire diameter is increased to improve structural strength, then the strength is improved, but the ability to navigate complex vessel geometries and maintain flexibility deteriorates
Solution Approach 1:
The wire pairs are pre-configured with specific phase differences during manufacturing, creating the necessary spatial configuration for both strength and flexibility. This preliminary action embeds the adaptability into the structure itself, allowing the device to navigate complex vessel geometries while maintaining structural integrity without requiring active control mechanisms during deployment
Data Source
Figure 1
Figure 2A~2C
Figure 2D~2E
AI summary
According to an aspect of some embodiments of the present invention there is provided a device for removal of obstructive material from a vessel comprising: an expandable structure sized for insertion into the vessel; and one or more portion protruding radially from a central longitudinal axis of the expandable structure such that a space between the protrusion and a closest portion of the expandable structure to the portion includes a radial component; wherein the space is sized and shaped to be suitable to accept obstructive material.