Self-Expanding Occlusion Device With Guide Wire Valve
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Solution Overview
Problem
Existing occlusion devices for blood vessels rely on blood clotting for occlusion, which is unpredictable and may not ensure immediate blockage, and often lack secure anchoring within the vessel, leading to potential displacement.
Innovation Solution
An occlusion device with a frame and occlusion membrane that expands to form a physical barrier within the vessel, anchored to the vessel wall, eliminating the need for blood clotting and providing secure positioning through a guide wire receiving element and self-expanding frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If occlusion devices rely on blood clotting to block vessels, then occlusion can be achieved, but the timing is unpredictable and full blockage cannot be ensured immediately
Solution Approach 1:
The device performs preliminary occlusion action through its physical barrier structure (frame and occlusion membrane) that is pre-configured to block blood flow immediately upon deployment, eliminating the need to wait for blood clotting to occur. The frame and membrane are positioned in advance to create the blocking effect as soon as the device is expanded in the vessel.
Solution Approach 2:
The patent introduces a physical intermediary structure (the occlusion membrane and frame assembly) that mediates the occlusion process by providing a tangible barrier to blood flow. This intermediary physical barrier replaces reliance on the biological clotting process, allowing immediate and predictable occlusion regardless of the patient's clotting status or anticoagulant medication.
2Reliability
If physical barrier devices are used for occlusion, then immediate blockage is achieved, but the device is not well anchored and is subject to displacement
Solution Approach 1:
The occlusion device is segmented into multiple functional components: a frame structure with anchoring elements, an occlusion membrane for creating the physical barrier, and a guide wire receiving element for positioning. This segmentation allows each component to perform its specific function - the frame provides anchoring, the membrane provides occlusion, and the receiving element facilitates precise placement, thereby solving both immediacy and stability requirements.
Solution Approach 2:
The device employs a nested structure where the occlusion membrane is attached to the frame, and the guide wire receiving element is integrated into the frame structure. This nested arrangement ensures that all components work together as an integrated system, with the membrane dependent on the frame for positioning and anchoring, while the frame uses the receiving element for precise placement, thereby achieving both immediate occlusion and stable anchoring.
3Stability of the object's composition
If a frame with wall-contacting portion is used, then anchoring is improved and device displacement is minimized, but the complexity of the device increases
Solution Approach 1:
The frame structure is designed to perform multiple functions simultaneously: it provides structural support for the occlusion membrane, creates anchoring through its wall-contacting portion, and incorporates the guide wire receiving element for positioning. This multi-functionality reduces the need for separate components, thereby achieving stable anchoring while minimizing overall device complexity.
Data Source
AI summary
An occlusion device (30) includes at least one self-expanding frame (42, 44) and graft material (46). Occlusion occurs by constricting the graft material (46) at a substantially central point or at an end of the device. The constriction is sized such that a guide wire (34) is able to pass therethrough. A valve mechanism (50) includes a screen (52) made from a resilient material and which includes a closable opening (54). The valve mechanism (50) allows a guide wire to pass through the occlusion device (30) while an effective physical barrier is maintained after removal of the guide wire (34).