Biodegradable Polymer-Coated Mesh Pouches for Implantable Devices
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Solution Overview
Problem
Current medical devices, such as cardiac rhythm management devices and implantable medical devices, face challenges with post-surgical complications including infection, pain, and excessive scar tissue formation due to bacterial contamination and the lack of effective prevention methods.
Innovation Solution
Biodegradable polymer-coated surgical meshes are formed into pouches that provide a barrier against bacterial growth, offer pain relief, and inhibit scar tissue formation by temporarily stiffening the mesh and releasing antimicrobial and anesthetic agents, thereby reducing the risk of infection and improving patient comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If surgical meshes are used to provide physical barrier and structural support, then mechanical strength and tissue separation are improved, but post-surgical complications including infection, pain, and excessive scar tissue formation occur
Solution Approach 1:
The mesh is coated with biodegradable polymer containing antimicrobial and anti-inflammatory agents at specific locations (contact points and filament surfaces) to provide localized protection against infection and excessive scarring, while maintaining the overall mechanical strength of the mesh structure
Solution Approach 2:
The invention combines surgical mesh with biodegradable polymer coating to create a composite material that provides both mechanical support and biological protection. The polymer layer containing antimicrobial agents and anti-inflammatory drugs creates a composite structure that addresses infection and scar tissue formation while the mesh provides structural integrity
2Reliability
If systemic antibiotics are administered to prevent infection, then bacterial growth may be inhibited, but the antibiotics are not effective at preventing implant-related infections and expose patients to systemic side effects
Solution Approach 1:
The biodegradable polymer coating acts as an intermediary carrier that delivers antimicrobial agents directly to the implant site. This localized delivery system bypasses the need for systemic antibiotic administration, providing effective infection prevention at the implant interface while avoiding systemic exposure and associated side effects
Solution Approach 2:
The mesh is pre-coated with biodegradable polymer containing antimicrobial agents before implantation. This preliminary action ensures that antimicrobial protection is immediately present at the implant site upon insertion, preventing bacterial colonization before infection can establish, rather than relying on post-operative systemic antibiotic treatment
3Ease of operation
If the mesh is made flexible for comfortable implantation, then ease of insertion is improved, but the mesh cannot effectively secure the device in position
Solution Approach 1:
The biodegradable polymer coating provides temporary stiffness to the mesh during the implantation period, securing the device in position. As the polymer gradually degrades over time, the mesh naturally softens and becomes more flexible, allowing for comfortable long-term implantation and tissue integration while maintaining positioning stability when needed
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 biodegradable polymer-coated surgical mesh pouches effectively prevent bacterial colonization, alleviate post-operative pain, and reduce scar tissue formation, enhancing the security and comfort of implantable medical devices during the healing process.
Implementation Method 1
One or more drugs are included in the polymer matrix of the coating to provide prophylactic effects and/or alleviate side effects or complications
Implementation Method 2
One or more drugs are included in the polymer matrix of the coating to provide prophylactic effects and/or alleviate side effects or complications
Implementation Method 3
biodegradable polymers that can act as a stiffening agent by coating the filaments or fibers of the mesh to temporarily immobilize the contact points of those filaments or fibers and/or by increasing the stiffness of the mesh by at least 1.1 times its original stiffness
Implementation Method 4
The addition of the antimicrobial agents permits the pouch to deliver antimicrobial agents at the implant site and thus to provide a barrier to microbial colonization of a CRM during surgical implantation
Data Source
AI summary
Biodegradable polymer-coated surgical meshes formed into pouches are described for use with cardiac rhythm management devices (CRMs) and other implantable medical devices. Such meshes are formed into a receptacle, e.g., a pouch or other covering, capable of encasing, surrounding and/or holding the cardiac rhythm management device or other implantable medical device for the purpose of securing it in position, inhibiting or reducing bacterial growth, providing pain relief and/or inhibiting scarring or fibrosis on or around the CRM or other implantable medical device. Preferred embodiments include surgical mesh pouches coated with one or more biodegradable polymers that can act as a stiffening agent by coating the filaments or fibers of the mesh to temporarily immobilize the contact points of those filaments or fibers and/or by increasing the stiffness of the mesh by at least 1.1 times its original stiffness. The pouches of the invention can also provide relief from various post-operative complications associated with their implantation, insertion or surgical use, and, optionally, include one or more drugs in the polymer matrix of the coating to provide prophylactic effects and/or alleviate side effects or complications associated with the surgery or implantation of the CRM or other implantable medical device.