Biocompatible Hydrogel Core-Shell Implant Design
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Solution Overview
Problem
Implantable medical devices face challenges due to foreign body reactions and inadequate access to body fluids for gas, nutrient, and metabolite exchange, limiting their biocompatibility and effectiveness.
Innovation Solution
Development of biocompatible hydrogels with a core-shell configuration, utilizing physical and chemical hydrogels composed of zwitterionic polymers and crosslinkers, which encapsulate therapeutic agents to enhance biocompatibility and accessibility, including a polymerization product of zwitterionic monomers and non-zwitterionic crosslinkers, and zwitterionic copolymers with reactive functional groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If implantable medical devices are used, then therapeutic treatment is provided, but foreign body reactions occur and biocompatibility is reduced
Solution Approach 1:
The patent uses a hydrogel coating as an intermediary layer between the implantable device and the biological environment. This hydrogel mediator reduces direct interaction between the device surface and host tissues, thereby minimizing foreign body reactions while maintaining therapeutic functionality. The hydrogel acts as a biocompatible interface that allows controlled material exchange between the device and surrounding body fluids.
2Productivity
If implantable medical devices are used, then therapeutic function is delivered, but access to body fluids for material exchange is inadequate
Solution Approach 1:
The patent employs a porous hydrogel structure that facilitates efficient material exchange between the implantable device and body fluids. The porous network allows diffusion of gases, nutrients, and metabolites while maintaining the structural integrity and biocompatibility of the device. This porous architecture enhances productivity by enabling adequate access to body fluids for essential material exchange.
3Reliability
If foreign body reactions are reduced through material selection, then biocompatibility improves, but device complexity increases
Solution Approach 1:
The patent utilizes composite hydrogel materials that combine multiple polymers (such as poly(ethylene glycol) and poly(N-isopropylacrylamide)) to achieve enhanced biocompatibility. This composite approach allows optimization of both biocompatibility and functional properties while managing complexity through systematic material design. The composite structure enables tailored properties that single materials cannot provide alone.
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 biocompatible hydrogels reduce foreign body reactions and improve access to body fluids, enabling effective delivery of therapeutic agents, such as insulin-producing cells, and promoting tissue integration and vascularization, thereby enhancing the treatment efficacy of implantable devices.
Implementation Method 1
the physical hydrogel includes: a) a non-zwitterionic physical hydrogel-forming polymer; and one or more of: a zwitterionic polymer, a branched zwitterionic copolymer, and a zwitterionic copolymer containing a physical gel-forming polymer
Implementation Method 2
inadequate accessibility to body fluid for exchange of materials such as gases, nutrients and/or metabolites
Implementation Method 3
the chemical hydrogel includes one or more of: 2) a polymerization product of a zwitterionic monomer and a non-zwitterionic crosslinker
Data Source
AI summary
Biocompatible hydrogel compositions according to aspects of the present invention are provided wherein the biocompatible hydrogel composition is or includes a physical hydrogel, a chemical hydrogel or both a physical hydrogel and a chemical hydrogel, along with biocompatible hydrogel compositions encapsulating a therapeutic agent and methods of use thereof.