Alternating-Mesh Surgical Thread for Stable Subcutaneous Fixation
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Solution Overview
Problem
Existing surgical threads face issues with mesh thread loosening at one end, particularly when inserted subcutaneously, and the use of adhesives or heat fusion complicates manufacturing and increases degeneration sites.
Innovation Solution
A surgical thread design featuring a cog thread surrounded by a mesh thread with alternating first and second regions of different mesh shapes and sizes, where the mesh thread is fully contacted with the cog thread, reducing loosening and minimizing the need for adhesives or heat fusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mesh thread is adhered to the cog thread at one end using heat fusion or adhesive, then the mesh loosening at that end is prevented, but the mesh thread still loosens at the other end and the manufacturing process becomes complicated
Solution Approach 1:
The surgical thread is segmented into distinct functional zones: a cog thread section with lifting function, a mesh thread section with tissue induction function, and transition sections connecting them. This segmentation allows each part to perform its specific function optimally while simplifying the manufacturing process by enabling separate production and assembly of components.
Solution Approach 2:
The cog thread is inserted into the mesh thread, creating a nested structure where the cog thread resides within the mesh thread lumen. This nested configuration allows the two different thread types to work together without requiring complex adhesion processes, as the cog thread naturally remains positioned within the mesh thread during insertion and deployment.
2Adaptability or versatility
If the cog thread is inserted into the tubular mesh thread, then the lifting function and tissue growth induction are combined, but the mesh thread is pushed toward the opposite end causing inflation at that end
Solution Approach 1:
Different sections of the surgical thread are designed with different mesh densities and structures. The transition sections have specific mesh configurations that provide gradual adaptation zones, preventing abrupt changes in thread geometry that could cause pushing or inflation. This local variation in mesh quality ensures stable thread composition throughout the device.
Solution Approach 2:
The transition sections are designed in advance to counteract the potential pushing force that could occur when the cog thread is inserted into the mesh thread. By creating gradual transition zones with appropriately designed mesh structures, the invention prevents the mesh thread from being pushed toward the opposite end, thereby avoiding inflation and maintaining positional stability.
3Reliability
If adhesives or heat fusion are used to adhere the mesh thread to the cog thread, then the mesh loosening is prevented, but the number of degeneration sites increases and production is complicated
Solution Approach 1:
The transition sections are designed to automatically provide the necessary fixation and structural support through their inherent mesh geometry and configuration. The mesh structure itself serves the function of securing the cog thread without requiring external adhesives or heat fusion processes, thereby eliminating additional degeneration sites and simplifying production.
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 design effectively prevents mesh thread pushing and loosening, simplifies production, and reduces the number of degeneration sites, ensuring reliable subcutaneous fixation and tissue growth.
Implementation Method 1
the mesh thread is fully contacted with the cog thread
Implementation Method 2
prevents mesh thread pushing and loosening
Data Source
AI summary
The present disclosure provides a surgical thread including a cog thread and a mesh thread surrounding the cog thread and assembled therewith, wherein, in the mesh thread, first and second regions with different mesh shapes are repeatedly disposed in a longitudinal direction of the cog thread.