Degradable Occluder Locking Ring for Stable Occlusion
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Solution Overview
Problem
Conventional metal occluders cause complications due to nickel ion release and permanence in the body, while degradable occluders suffer from low elasticity leading to easy detachment during occlusion operations.
Innovation Solution
A degradable occluder with a net-shaped framework and locking member, featuring a locking ring that deforms to secure the occluder in place via a limiting through hole, ensuring stability and occlusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional metal occluder is used, then the occlusion effect is achieved through super-elastic properties, but complications occur due to nickel ion release and permanent presence in the body
Solution Approach 1:
The patent changes the material parameter from permanent metal (nickel-titanium alloy) to degradable polymer material, allowing the occluder to maintain its occlusion function while eliminating long-term harmful effects. The material is designed to degrade after completing its occlusion mission, preventing permanent presence and associated complications.
Solution Approach 2:
The patent adopts a disposable approach by using degradable material that completes its function and then degrades. The occluder is designed to be temporary, degrading after achieving endothelialization and occlusion, thereby eliminating the need for permanent implantation and associated long-term complications.
2Object-generated harmful factors
If a degradable occluder is used, then nickel ion release is avoided, but the low elasticity causes the occluder to fall off during operation
Solution Approach 1:
The patent uses a composite structure combining degradable polymer material with a specific framework design. The net-shaped framework provides structural integrity while the degradable material maintains compatibility with body tissues. This composite approach balances the need for elasticity with the requirement to avoid nickel ion release.
Solution Approach 2:
The patent applies different properties to different parts of the occluder. The net-shaped framework provides structural support and elasticity where needed, while the degradable material provides biocompatibility and degradation capability. This local differentiation allows the occluder to achieve both strength and degradability in appropriate locations.
3Duration of action of stationary object
If a degradable material is used, then the occluder can be removed after function, but the material lacks the elasticity needed for stable occlusion
Solution Approach 1:
The patent incorporates dynamic characteristics by using a net-shaped framework that can deform and adapt during deployment, then stabilize after endothelialization. The degradable material is designed to maintain structural integrity during the occlusion period and then degrade after completing its function, providing temporal stability followed by controlled removal.
Solution Approach 2:
The patent performs preliminary endothelialization promotion during the occlusion period, allowing the body's own tissues to grow over the occluder surface. This preliminary action ensures stable occlusion while the material remains in place, after which the occluder can safely degrade without compromising the established occlusion.
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 occluder maintains effective occlusion by preventing detachment and facilitating endothelialization, addressing the limitations of both metal and degradable occluders.
Implementation Method 1
the locking ring can be slotted into/penetrate out of the limiting through hole in the melt tail end by means of deformation
Implementation Method 2
the occluder mainly acts as a bridge in a human body and facilitates endothelialization of surrounding tissues on the surface of the occluder
Data Source
AI summary
Disclosed is an occluder made of a degradable material and including a net-shaped framework and a locking member. The net-shaped framework includes an upper disc surface, a waist part, and a lower disc surface. The lower disc surface is provided with a melt tail end and a limiting through hole formed therein. The locking member includes a tensioning part having a diffusion end and a contraction end, and a locking part. The diffusion end is connected to the upper disc surface. The contraction end is connected to the locking part. A locking ring is provided at the proximal end of the locking part. The diameter of the locking ring is greater than that of the distal end of the through hole. The locking ring can be slotted into/penetrate out of the through hole by means of deformation. The occluder does not easily fall off and has a good occlusion effect.