pH-Regulating Wound Dressing with Acid-Polymer Matrix
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Solution Overview
Problem
Existing wound dressings fail to control the pH value of wound exudate effectively, leading to alkaline environments that hinder healing in chronic and infected wounds, as buffer substances are delivered uncontrolledly and not as needed.
Innovation Solution
A wound dressing incorporating a Brönsted acid embedded in or surrounded by a pH-sensitive polymer matrix, specifically using acids like acetic acid, citric acid, and lactic acid, to stabilize the pH value within a physiological range, ensuring controlled release and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If buffer substances are added to wound dressings to control pH, then the pH stability is improved, but the release control is insufficient leading to uncontrolled delivery
Solution Approach 1:
The patent applies preliminary action by pre-embedding the buffer substance within a pH-sensitive polymer matrix before application to the wound. The matrix is prepared in advance with specific pH-sensitive properties that will trigger controlled release only when exposed to alkaline wound exudate, rather than adding buffer substances directly to the wound dressing.
Solution Approach 2:
The patent utilizes parameter changes by employing a pH-sensitive polymer matrix that changes its physical or chemical parameters (such as solubility, swelling, or degradation rate) in response to pH variations. When the wound exudate becomes alkaline, the matrix undergoes a parameter change that triggers the controlled release of the buffer substance, thereby achieving both pH stability and release control.
2Object-affected harmful factors
If buffer substances are released to neutralize alkaline pH, then the harmful alkaline environment is reduced, but the release timing is not optimized for wound healing phases
Solution Approach 1:
The patent implements feedback by using the pH level of the wound exudate as a trigger signal. The pH-sensitive polymer matrix continuously monitors the pH environment and automatically adjusts the release of buffer substances based on real-time pH conditions. When alkalinity is detected, the matrix responds by releasing buffer to neutralize it, creating a closed-loop feedback system that optimizes release timing according to wound healing needs.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the buffer release mechanism to activate only when specific pH conditions are met. The pH-sensitive matrix is prepared in advance with thresholds set to trigger release at optimal moments during wound healing, ensuring that buffer substances are released precisely when the wound environment becomes alkaline and intervention is most beneficial.
3Stability of the object's composition
If more buffer substance is included to ensure adequate pH control, then the pH stabilization capacity is improved, but the complexity of the dressing increases
Solution Approach 1:
The patent applies composite materials by combining the buffer substance with a pH-sensitive polymer matrix to create a functional composite. This composite material integrates both the pH-buffering capacity and the pH-sensitive release mechanism into a single unified structure, thereby achieving effective pH control without proportionally increasing the overall complexity of the wound dressing.
Solution Approach 2:
The patent implements universality by designing the pH-sensitive polymer matrix to perform multiple functions simultaneously: it serves as both the structural carrier for the buffer substance and the intelligent trigger mechanism for controlled release. This multi-functionality allows the dressing to achieve enhanced pH control capacity without adding separate complex subsystems.
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 wound dressing effectively maintains a stable pH environment, promoting wound healing by preventing tissue degradation and pathogenic microorganism proliferation, thereby enhancing the healing process in chronic and infected wounds.
Implementation Method 1
a pH-sensitive polymer which has a first solubility or dissolution rate at a first pH and a second solubility or dissolution rate at a second pH which is different from the first pH
Implementation Method 2
A wound dressing incorporating a Brönsted acid embedded in or surrounded by a pH-sensitive polymer matrix, specifically using acids like acetic acid, citric acid, and lactic acid, to stabilize the pH value within a physiological range
Data Source
AI summary
The present invention relates to wound dressings, more particularly for the need-based treatment of chronic and/or infected wounds, comprising a Bronsted acid and a pH-sensitive polymer, wherein the Bronsted acid is embedded in a matrix of pH-sensitive polymer or is surrounded by pH-sensitive polymer. The present invention also relates to particles containing a Bronsted acid and a pH-sensitive polymer for use in the treatment of wounds, more particularly infected wounds and/or chronic wounds.