Single-Sheet Nanofibrous Mesh for Hernia Repair
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Solution Overview
Problem
Current biodegradable surgical meshes for hernia repair degrade too quickly, leading to high rates of hernia recurrence due to insufficient support during scar tissue formation, and often cause connective tissue irritation and mesh rejection due to their multilayered or 2D structures, which restrict cell infiltration and wound healing.
Innovation Solution
A flat, single-sheet, highly porous, adhesion-resistant surgical mesh composed of a slowly biodegradable synthetic polymer electrospun into nanofibers, providing structural support and facilitating cell attachment and infiltration while gradually degrading over at least six months to allow sufficient scar tissue formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable meshes are used to avoid long-term irritation and chronic pain, then patient comfort is improved, but the meshes degrade too quickly and cause hernia recurrence
Solution Approach 1:
The patent modifies the degradation rate parameter of the mesh material by using slowly biodegradable synthetic polymers instead of rapidly degrading materials. This parameter change allows the mesh to maintain structural integrity for at least six months while still being biodegradable, thus preventing hernia recurrence during the critical scar tissue formation period while avoiding long-term irritation.
Solution Approach 2:
The patent employs composite material structures combining synthetic polymer fibers with controlled degradation properties. The mesh is constructed from slowly biodegradable synthetic polymers that provide sustained mechanical support while gradually degrading, creating a composite functionality that balances temporary structural reinforcement with eventual resorption in the body.
2Reliability
If multilayered meshes are used to provide rapid degradation for wound healing and tissue support, then wound healing is improved, but the mesh weight increases causing connective tissue irritation and mesh rejection
Solution Approach 1:
The patent extracts and eliminates the multilayered structure from the mesh design, using a single-layer construction instead. This removal of unnecessary layers reduces mesh weight and foreign material content, thereby minimizing connective tissue irritation and mesh rejection while still providing effective wound healing support through the slowly biodegradable material properties.
Solution Approach 2:
The patent applies local quality by optimizing the fiber distribution and porosity within the single-layer mesh structure. The mesh features controlled pore sizes and fiber arrangements that locally enhance cell infiltration and wound healing capabilities without requiring additional layers, thus maintaining therapeutic effectiveness while reducing overall mesh complexity and weight.
3Ease of manufacture
If 2D mesh structure is used for simplicity, then manufacturing is easier, but cell attachment and infiltration are limited resulting in poor wound healing
Solution Approach 1:
The patent transitions from a traditional 2D mesh structure to a three-dimensional porous architecture. This dimensional change creates a more complex spatial structure that enhances cell attachment, infiltration, and proliferation by providing multiple surfaces and pathways. The 3D structure is achieved through controlled fiber arrangement and porosity in the slowly biodegradable polymer matrix, improving wound healing while remaining manufacturable.
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 mesh effectively reduces hernia recurrence by providing prolonged support until scar tissue is strong enough, minimizes foreign material-induced irritation, and promotes successful wound healing through its 3D structure and porosity, ensuring integration and degradation without long-term pain or rejection.
Implementation Method 1
a flat nanofibrous three-dimensional mesh that is used in tissue repair, namely hernia repair... composed of a slowly biodegradable synthetic polymer that is electrospun into nanofibers and randomly stacked to form a three-dimensional (3D) mesh
Data Source
AI summary
A mesh implant is disclosed and comprises a single sheet, highly porous, adhesion-resistant, tensile surgical implant composed of a gradually biodegradable synthetic polymer material that is electrospun into nanofibers and randomly stacked to form a three-dimensional (3D) mesh. The mesh implant is for tissue repair and hernia repair. The single-sheet design reduces the foreign material that make up the mesh implant, which minimizes mesh implant rejection. The gradually biodegradable nature of the mesh implant guarantees that the mesh stays in place and supports the repaired site long enough until a proper scar tissue has built up, after which the mesh implant disappears from the body, therefore preventing pain and irritability. The 3D design of the nanofibrous network and the high porosity of the mesh implant facilitate cell attachment, infiltration, and proliferation, all necessary for scar tissue formation, mesh integration, wound healing, and proper defect closure.