In-situ Cross-linkable Polymeric Wound Dressing
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Solution Overview
Problem
Current wound healing technologies face challenges in promoting effective healing, particularly in contaminated wounds, where the inflammatory phase becomes chronic, leading to delayed healing, reduced granulation, and persistent inflammation, and there is a need for a composition that is easily applied, biocompatible, and provides anti-microbial properties to prevent infection and scar formation.
Innovation Solution
A biocompatible polymeric composition comprising a mixture of polyanionic and polycationic polymers, which can be formed into a gelatinous matrix that solidifies to create a protective film on the wound surface, accelerating blood clotting and wound healing, while also allowing for controlled viscosity and drug delivery options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wound healing formulations are used, then the wound surface is covered with a protective layer, but the inflammatory phase becomes chronic and healing is delayed
Solution Approach 1:
The patent modifies the chemical parameters of wound healing formulations by incorporating specific enzymes (hyaluronidase, collagenase, elastase) at controlled concentrations that regulate the inflammatory phase duration and intensity, thereby preventing chronic inflammation while maintaining protective coverage
Solution Approach 2:
The invention creates a composite formulation combining multiple polymer components with distinct functions: one component provides protective coverage while another component delivers anti-inflammatory enzymes, allowing simultaneous protection and inflammation regulation to accelerate healing
2Object-affected harmful factors
If enzymes are added to eliminate microbial contamination, then infection is prevented, but the same enzymes break down wound tissue and surrounding skin
Solution Approach 1:
The patent applies different enzyme types to different locations and stages of wound healing: hyaluronidase is used early to break down hyaluronic acid and reduce edema, while collagenase and elastase are applied later to remove necrotic tissue without damaging viable tissue, thereby eliminating microbes while preserving wound structure
Solution Approach 2:
The formulation employs sequential enzyme action where enzymes are delivered in a controlled temporal sequence, with each enzyme becoming active at specific time intervals to perform its function (microbe elimination, debris removal, tissue remodeling) without overlapping actions that would cause tissue damage
3Reliability
If fibronectin is used to promote cell migration and tissue regeneration, then wound healing is enhanced, but the cost of the formulation increases
Solution Approach 1:
The patent uses fibrinogen as an intermediary substance that is converted to fibrin during the clotting process, creating a natural scaffold that supports cell migration and tissue regeneration similarly to fibronectin but at lower cost, thereby maintaining regenerative benefits while reducing formulation expense
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 composition facilitates rapid hemostasis and wound healing by forming a protective matrix that reduces inflammation and promotes tissue regeneration, potentially reducing the need for medical procedures and hospitalization time, and minimizing scar formation.
Implementation Method 1
A biocompatible polymeric composition comprising a mixture of polyanionic and polycationic polymers, which can be formed into a gelatinous matrix that solidifies to create a protective film on the wound surface
Implementation Method 2
accelerating blood clotting and wound healing
Implementation Method 3
at least one cross-linkable polyanionic polymer
Data Source
AI summary
A biocompatible polymeric composition for cross-linking in-situ in a wound is disclosed comprising 1) one or more polyanionic polymers such as alginates or hyaluronates, able to be cross-linked the surface of the wound and 2) one or more polycationic polymers such as chitosan or DEAE-Dextran, that assists in the solidification process as well as speeds up hemostasis without the need for applying pressure. The biocompatible polymeric composition may further comprise a cross-linking agent such as aqueous calcium chloride. The invention encompasses an initial polymeric composition, the solidified matrix cross-linked and integrated at the wound site, including the methods of using, applying, and cross-linking the composition.