Woven Single-Rivet Degradable Implant for Soft-Thread Shape Setting
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Solution Overview
Problem
Metal occluders cause complications such as delayed atrioventricular block, device-related thrombosis, metal ion allergy, and long-term interventional puncture surgery obstacles, while degradable threads are soft and difficult to shape.
Innovation Solution
A woven single-riveting degradable implant with a convertible compressed and free configuration, woven from degradable material, featuring a first structure with a connecting element and a second structure with interlaced parabolas forming intersections and a size-adjustable contractile opening, using a weaving tool and heat treatment to form a mesh structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal material is used for occluder, then structural strength and durability are improved, but complications such as delayed atrioventricular block, device-related thrombosis, metal ion allergy, and long-term interventional puncture surgery obstacles occur
Solution Approach 1:
The patent changes the material parameter from metal to degradable polymer, fundamentally altering the material properties to eliminate metal ion-related complications while maintaining structural functionality through controlled degradation over time
Solution Approach 2:
The patent employs a degradable material that is designed to temporarily provide structural support and then degrade away, eliminating the need for long-term metal implant retention and associated complications like thrombosis and ion allergy
2Object-generated harmful factors
If degradable material is used for implant, then biocompatibility and flexibility are improved, but the thread becomes soft and difficult to shape
Solution Approach 1:
The patent applies heat treatment as a preliminary action during manufacturing to set the shape of the degradable thread before deployment, enabling the soft material to be formed into the required configuration and maintain its shape in the body
Solution Approach 2:
The patent utilizes temperature parameter change through heat treatment to temporarily alter the mechanical properties of the degradable material, enabling shaping during manufacturing and then allowing it to degrade and dissolve in the physiological environment
3Stability of the object's composition
If double-riveting structure is used, then structural stability is improved, but persistent compression causes delayed atrioventricular block
Solution Approach 1:
The patent removes one of the two rivets from the traditional double-riveting structure, reducing the compression force applied to the tissue while maintaining sufficient structural stability through the single-rivet design with optimized force distribution
Solution Approach 2:
The patent changes the structural configuration parameter from double-rivet to single-rivet, altering the compression characteristics to reduce the risk of atrioventricular block while maintaining occlusion functionality
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 implant avoids complications associated with metal devices and provides a flexible, shapeable solution for occluding defects, applicable to various occluders, and promotes endothelialization.
Implementation Method 1
performing shape-setting by heat treatment on the mesh structure
Data Source
AI summary
A woven single-riveting degradable implant belonging to the technical field of medical devices convertible between a compressed configuration and a free configuration comprises a first structure, a second structure, and a middle portion provided between the first structure and the second structure, wherein the implant is woven with weaving threads made of a degradable material; and the first structure is provided with at least one connecting element, and the second structure comprises parabolas formed by a plurality of bent threads, and is provided with a size-adjustable contractile opening at the one end of the second structure away from the middle portion. The implant overcomes the defects in the prior art to solve the problem that the degradable thread material is difficult to be shaped into an occluder due to the softness thereof, thus avoiding complications unique to metallic devices caused by an metallic occluder due to the material characteristic thereof.