Embolization Device Bristle Anchoring via Tube Wall Penetration
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Solution Overview
Problem
Existing embolization devices prone to migration due to unreliable anchoring forces, often caused by disconnection of bristles from the central core and irregular attachment of flow restrictors, which can lead to inadequate expansion and anchoring in bodily lumens.
Innovation Solution
An embolization device with a stem and flexible bristles that penetrate through the tube wall, secured by a filler material and mechanical compression, ensuring reliable anchoring through a combination of radial and axial shrinkage or compression, and potentially using a flow restrictor integral to the material for enhanced anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bristles are used to anchor the embolization device, then anchoring force is improved, but the bristles may become disconnected from the central core which reduces anchoring force and increases migration risk
Solution Approach 1:
The bristles are integrated directly into the central core structure, forming a unified component rather than separate attachable parts. This integration eliminates the connection interface that could fail, ensuring the bristles remain permanently secured to the central core while maintaining anchoring functionality.
Solution Approach 2:
The bristles are pre-secured to the central core during manufacturing through integration, so that when the device is deployed, the anchoring structure is already complete and reliable without requiring additional assembly steps that could compromise connection integrity.
2Reliability
If a separate flow restrictor membrane is attached to the central core, then additional anchoring force is provided, but the attachment may be unreliable and cause deformations or irregularities in expansion
Solution Approach 1:
The flow restrictor membrane is integrated directly into the central core structure, forming a single unified component. This integration eliminates the separate attachment step that causes reliability issues and deformations, ensuring the membrane expands regularly and provides consistent anchoring force without detachment risks.
3Ease of manufacture
If manual manipulation is used to attach the flow restrictor during assembly, then the device can be assembled, but the attachment is unreliable and may cause deformations
Solution Approach 1:
The flow restrictor membrane is pre-integrated into the central core during manufacturing, so that when the device reaches assembly, the attachment is already complete and reliable. This eliminates the need for manual manipulation during assembly, removing the source of unreliability and deformations while maintaining manufacturing efficiency.
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 solution provides a stable and reliable anchoring mechanism that prevents migration and ensures effective clot formation by maintaining the embolization device in place within the bodily lumen, enhancing the safety and efficacy of the procedure.
Implementation Method 1
The tube may be shrunk such that a portion of the at least one of the plurality of flexible bristles is clamped between two opposing sides of the tube wall
Implementation Method 2
mechanically compressing the tube such that a portion of the at least one of the plurality of flexible bristles is clamped between two opposing sides of the tube wall
Implementation Method 3
A portion of at least one of the plurality of flexible bristles may be disposed within a volume of the material of the stem such that the material surrounds and secures the portion of the flexible bristle
Data Source
AI summary
There is provided an embolization device for promoting clot formation in a bodily lumen and having a contracted delivery configuration and an expanded deployed configuration, the embolisation device comprising: a stem comprising a tube having a tube wall; and a plurality of flexible bristles extending radially outwardly from the tube, wherein at least one of the plurality of flexible bristles penetrates through the tube wall.