Nanoparticle Hydrogel Wound Dressings for Exudate Management
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Solution Overview
Problem
Current wound dressings have limitations, such as dehydrating wounds, being non-absorbent, or failing to prevent bacterial ingress, and lack shape-retentive properties, making them inadequate for various wound healing stages and types.
Innovation Solution
A dry powder of biocompatible polymeric nanoparticles that form a shape-retentive aggregate upon exposure to physiological media, absorbing wound exudate to create a conforming, non-occlusive dressing with sustained drug delivery capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydrogel dressings are used to maintain a moist wound environment, then wound healing is promoted, but the dressings cannot absorb excess exudate from heavily exuding wounds
Solution Approach 1:
The patent combines hydrogel particles (which maintain moisture) with alginate particles (which absorb exudate) into a single composite dressing formulation. This merging allows the dressing to simultaneously provide a moist healing environment while absorbing excess wound exudate, resolving the contradiction between moisture maintenance and exudate absorption capacity.
Solution Approach 2:
The invention uses a composite material system consisting of hydrogel particles, alginate particles, and optionally collagen particles. This composite structure integrates the moisture-retaining properties of hydrogels with the high absorption capacity of alginates, enabling the dressing to handle both moist wound healing and exudate management effectively.
2Object-affected harmful factors
If conventional dressings are used to protect wounds, then protection is provided, but they lack shape-retentive properties and do not conform to wound contours
Solution Approach 1:
The patent employs a dynamic formulation where the dressing components (hydrogel, alginate, collagen particles) can move and rearrange themselves to conform to the wound shape. The suspension format allows particles to flow and adapt to irregular wound contours, providing both protection and shape-retentive properties that match the wound geometry.
Solution Approach 2:
The composite particle system provides different functional properties in different regions of the dressing. Collagen particles provide structural support and shape retention in areas needing reinforcement, while hydrogel particles maintain moisture in areas requiring healing promotion, allowing the dressing to adapt locally to different wound zone requirements.
3Reliability
If dressings are designed for specific wound types, then effectiveness is improved, but versatility across different wound stages and types is limited
Solution Approach 1:
The patent creates a universal dressing formulation that can be applied across multiple wound types and healing stages. The composite of hydrogel, alginate, and collagen particles provides a multi-functional system that addresses protection, moisture management, absorption, and structural support needs common to various wound types including diabetic ulcers, venous stasis ulcers, arterial ulcers, and pressure ulcers.
Solution Approach 2:
The invention allows for parameter adjustments in the formulation (ratios of hydrogel to alginate to collagen particles, particle size distributions, concentration of active ingredients) to optimize the dressing for specific wound types while maintaining a core versatile formulation that can adapt to different wound healing stages and requirements.
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 nanoparticle dressings provide a moist environment, prevent infection, promote wound closure, and offer controlled release of therapeutic agents, addressing the limitations of existing dressings by being absorbent, conformable, and effective across different wound types.
Implementation Method 1
the gel particles absorb water or other polar liquids and coalesce into a shape-retentive aggregate
Implementation Method 2
held together by non-covalent bond physical forces comprising hydrophobic-hydrophilic interactions and hydrogen bonding
Implementation Method 3
held together by non-covalent bond physical forces comprising hydrophobic-hydrophilic interactions and hydrogen bonding
Data Source
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AI summary
The present invention relates to a method of forming shape-retentive and shape-conforming aggregate wound dressings and biomaterials composed of gel nanoparticles and wound or bodily fluid in which the aggregates are held together by non-covalent bond physical forces such as, without limitation, hydrophobic-hydrophilic interactions and hydrogen bonds. The method comprises introducing a dry powder of gel nanoparticles to a wound site in which the nanoparticles absorb some of the blood or wound exudate and coalesce in situ into the claimed shape-retentive aggregate dressing. The method also comprises introducing the dry nanoparticle powder in or on a wet bodily tissue in vivo to form the claimed shape-retentive biomaterial. In addition, the method also comprises incorporating biomedical agents to produce medicated aggregate dressings or biomaterials for a variety of medical applications. This invention also relates to uses of the method of formation of the shape-retentive aggregates of gel nanoparticles.