Braided Occluder Disc Sealing in Small-Sheath Delivery
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Solution Overview
Problem
Existing plugging devices face challenges in achieving optimal sealing performance while minimizing the outer diameter of the sheath tube, which is crucial for interventional medical instruments.
Innovation Solution
The plugging device incorporates a film member on the disc face, secured by a gathering member comprising inner and outer sleeves, which stabilizes the film member and enhances sealing performance, while using braiding filaments to form a mesh structure that is fixed by gathering members, thereby reducing the need for a larger sheath tube diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a film member is added to improve sealing performance, then the sealing performance is improved, but the device complexity increases
Solution Approach 1:
The film member is integrated with the braiding filaments and gathering member to form a unified sealing structure. The film member covers the disc face formed by braiding filaments, and all components are gathered together by the gathering member, creating a combined sealing system that improves reliability without proportionally increasing complexity
Solution Approach 2:
The film member is nested within the structure formed by the braiding filaments and gathering member. The gathering member with inner and outer sleeves accommodates and fixes the film member in its gathering region, creating a nested configuration where the film is contained within the braided structure, efficiently combining multiple sealing elements
2Stability of the object's composition
If the gathering member structure is used to secure the film member, then the stability is improved, but the device complexity increases
Solution Approach 1:
The gathering member is divided into an inner sleeve and an outer sleeve, creating a segmented structure that provides stability through multiple components. The inner sleeve and outer sleeve work together to secure the film member and braiding filaments, with the segmentation allowing for easier delivery through the sheath tube while maintaining stability upon deployment
Solution Approach 2:
The gathering member serves multiple functions: it gathers and secures the braiding filaments, accommodates and fixes the film member, and provides a structure for radial expansion to secure the entire assembly. This multi-functionality reduces the need for separate components, stabilizing the device without proportionally increasing complexity
3Strength
If braiding filaments are used to form the disc face, then the structural integrity is improved, but the outer diameter of the sheath tube must be larger
Solution Approach 1:
The braiding filaments are nested within the gathering member structure during delivery. The inner and outer sleeves of the gathering member contain the braided structure in a compact configuration, allowing it to pass through a smaller sheath tube diameter. Upon deployment, the gathering member expands radially to secure the full structural integrity of the braided disc face
Solution Approach 2:
The gathering member transitions from a compressed delivery state to an expanded deployed state. During delivery, the gathering member constrains the braiding filaments in a compact form suitable for passing through a small sheath tube. After deployment, the gathering member radially outwardly dilates to secure the braiding filaments in their full structural configuration, dynamically adapting the device size to different operational phases
Data Source
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AI summary
The present invention relates to a plugging device, including a first part, and a second part connected to the first part. The first part or the second part includes a plurality of braiding filaments and a gathering member; portions of the braiding filaments that are close to one ends of the braiding filaments cooperate to form a disc face. The plugging device further includes a film member. The film member at least covers part of an outer surface of the disc face; the gathering member includes an inner sleeve and an outer sleeve, both of which are hollow and sleeved; and one end of each braiding filament and at least part of a gathering region of the film member are all fixed to the gathering member. The present invention further relates to a plugging device, including a first part. The first part includes a plurality of braiding filaments and a gathering member. One end of each braiding filament is fixed to the gathering member. The first part is provided with at least one disc face; some of the plurality of braiding filaments form a gathering portion by means of shape convergence; the gathering member is located in a space enclosed by the gathering portion; and at least one disc face formed by cooperation of the gathering portion is flat and sealed.