Occluder Blocking Membrane Suture Configuration
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Solution Overview
Problem
Current occluders made from nickel-titanium alloy wires cause immune reactions and complications due to nickel ion presence, and biodegradable occluders face issues with the blocking membrane not abutting properly against the disk surface after deployment, leading to incomplete defect occlusion and reduced safety and effectiveness.
Innovation Solution
An occluder design featuring a first disk-shaped structure woven with crossing wires, a blocking membrane sutured to the outermost circle of crossing points with fewer sutures, and an additional circle of sutural pores closer to the edge, which moves to push the blocking membrane against the disk surface upon release, ensuring complete occlusion and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a biodegradable occluder is used to avoid immune reactions and nickel ion damage, then biocompatibility is improved, but the blocking membrane may not abut properly against the disk surface after deployment, leading to incomplete defect occlusion
Solution Approach 1:
The suture attachment structure is segmented into multiple discrete attachment points distributed around the perimeter of the blocking membrane, rather than a continuous attachment. This segmentation allows independent movement and positioning of each suture point, enabling the membrane to conform to the disk surface while maintaining secure attachment
Solution Approach 2:
The occluder design incorporates dynamic elements that allow the blocking membrane to move and adjust its position after deployment. The membrane can dynamically abut against the disk surface through controlled movement of the suture attachment points, ensuring complete occlusion while accommodating variations in deployment conditions
2Ease of operation
If the sealing disk is collected into the sheath tube, then insertion is facilitated, but the stitched intersections between the suture and the grids of the sealing disk move towards the distal end, causing the edge of the blocking membrane to roll up
Solution Approach 1:
The suture attachment structure is designed with preliminary anti-action features that counteract the rolling tendency of the blocking membrane edge during sheath tube insertion. The attachment points are positioned and configured to pre-compensate for the distal movement that occurs during compression, maintaining edge stability throughout the insertion process
Solution Approach 2:
The blocking membrane and suture attachment structure are pre-positioned and pre-configured before insertion to anticipate and prevent edge rolling. The attachment points are arranged in advance to ensure proper membrane positioning is maintained during the compression and insertion process into the sheath tube
Data Source
Figure 1~2
Figure 3~4
AI summary
Provided is an occluder, comprising a first disk-shaped structure (10) with a grid, wherein the first disk-shaped structure (10) is woven from at least two groups of braided wires, the two groups of braided wires are crossed to form multiple rings of crossing points, a blocking membrane (20) is also arranged in the disk-shaped structure (10), an edge of the blocking membrane (20) is connected to the outermost ring of crossing points (100) of the multiple rings of crossing points through a sewing wire, and the number of crossing points in the outermost ring of crossing points (100) sewn with the blocking membrane (20) is smaller than the number of all the crossing points in the outermost ring of the crossing points (100), and a position of the blocking membrane (20) near the edge thereof is connected to a ring of crossing points within the outermost ring of crossing points (100) in the multiple rings of crossing points through the sewing wire. The occluder can reduce the possibility of the phenomenon where the edge of the blocking membrane (20) cannot abut against a disk face edge of the occluder, improving the occlusion effect of the occluder.