Benzalkonium-Coated Surgical Mesh for Antimicrobial Hernia Repair
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Solution Overview
Problem
Existing surgical meshes for hernia repair lack effective antimicrobial properties, leading to post-operative infections and impaired healing due to bacterial colonization, and do not promote fibroblast proliferation for rapid tissue regeneration.
Innovation Solution
A surgical mesh coated with benzalkonium chloride (BAK) on a polymeric substrate, with a coverage of 0.5 to 2.5% w/w, providing both antimicrobial effects and fibroblast proliferative capacity, using a biodegradable polymer coating and maintaining a porous structure with 0.1 to 5 mm pore size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If surgical meshes are made from polypropylene to achieve high tensile strength, then mechanical strength is improved, but infection risk increases due to lack of intrinsic antimicrobial activity
Solution Approach 1:
The patent combines polypropylene mesh with antimicrobial coatings (silver, zinc oxide, copper oxide, or triclosan) to create a composite material that simultaneously provides mechanical strength and antimicrobial activity. The coating layer is applied to the polypropylene substrate through dip-coating or spray-coating methods, creating a multi-functional material that resolves the contradiction between strength and infection resistance.
Solution Approach 2:
The patent introduces antimicrobial agents as intermediary substances applied to the mesh surface. These coatings act as mediators between the polypropylene substrate and the biological environment, providing infection protection without compromising the mechanical properties of the underlying mesh structure.
2Object-affected harmful factors
If antimicrobial agents are coated on mesh surfaces to prevent infections, then infection risk is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes coating parameters including concentration (0.01-10% w/v), coating weight (0.1-10% w/w), and coating thickness (1-10 μm) to achieve effective antimicrobial activity while minimizing manufacturing complexity. By establishing specific parameter ranges, the patent makes the coating process more controllable and reproducible.
Solution Approach 2:
The patent uses readily available antimicrobial agents such as silver, zinc oxide, copper oxide, and triclosan that can be easily incorporated into coating solutions. These materials are cost-effective and can be applied through simple dip-coating or spray-coating processes, avoiding the need for complex manufacturing infrastructure.
3Object-affected harmful factors
If coating weight is increased to enhance antimicrobial activity, then infection protection is improved, but fibroblast proliferation is inhibited
Solution Approach 1:
The patent identifies and optimizes the critical parameter of coating weight to fall within the specific range of 0.1-10% w/w. This parameter optimization allows sufficient antimicrobial agent presence for infection protection while maintaining fibroblast proliferation at acceptable levels, resolving the contradiction between infection protection and tissue regeneration.
Solution Approach 2:
The patent applies antimicrobial coatings locally to the mesh surface rather than throughout the bulk material. This localized application ensures adequate antimicrobial activity at the infection-prone surface while minimizing the total amount of antimicrobial agent that could potentially inhibit fibroblast proliferation.
4Strength
If pore size is reduced to improve mesh strength, then mechanical strength is improved, but tissue integration and healing are impaired
Solution Approach 1:
The patent optimizes pore size to a specific range of 0.1-5 mm that balances mechanical strength and tissue integration. This parameter optimization allows adequate structural integrity while maintaining sufficient porosity for fibroblast infiltration, collagen deposition, and vascularization, thereby resolving the contradiction between strength and healing.
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 BAK-coated mesh effectively prevents infections from bacteria such as Staphylococcus aureus and Escherichia coli while enhancing fibroblast proliferation, promoting rapid and safe tissue regeneration.
Implementation Method 1
The high incidence of the infection due to the said surgical process affect economic aspects, social burden, hospital re-admission, re-operation, hernia recurrence, impaired quality of life and plaintiff litigation [14,15]. In addition, according to the World Health Organization (WHO), antibiotic resistance will be one of the leading causes of death over other important diseases such as cancer by the year 2050 [16]. MRSA is causing global health problems, especially in medical instruments and catheters because Staphylococcus aureus is a human pathogen that can easily develop resistance to antibiotics [17,18].
Implementation Method 2
The BAK-coated mesh effectively prevents infections from bacteria such as Staphylococcus aureus and Escherichia coli while enhancing fibroblast proliferation, promoting rapid and safe tissue regeneration.
Implementation Method 3
maintaining a porous structure with 0.1 to 5 mm pore size
Data Source
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AI summary
The present invention provides a new and improved surgical mesh for hernia repair which provides antimicrobial activity and fibroblast proliferating activity. The surgical mesh is comprised of a polymeric substate coated with benzalkonium chloride.