Hydrogel Electrode Dressing for Scar-Free Wound Healing
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Solution Overview
Problem
Current wound care dressings often cause discomfort and pain due to high electrical current and voltage, have cytotoxicity from silver electrodes, fail to maintain a moist environment, and do not effectively prevent scarring during wound healing.
Innovation Solution
A wound care dressing featuring a hydrophobic base fabric with electrode pairs covered by hydrogel layers that form a bioelectric field upon absorbing tissue fluid, reducing irritation and cytotoxicity while maintaining moisture and preventing bacterial infection, and promoting scar-free healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high current and voltage are supplied for electrical stimulation to promote wound healing, then wound healing is promoted, but patient discomfort and pain increase
Solution Approach 1:
The patent changes the electrical parameters by using multiple electrode pairs arranged in arrays to generate low-level electrical fields, replacing the conventional high current and voltage approach. This parameter change maintains wound healing promotion while significantly reducing patient discomfort and pain.
Solution Approach 2:
The patent introduces hydrogel as an intermediary medium between the electrodes and the wound. The hydrogel conducts electricity while providing a cushioning effect and reducing direct electrical刺激 to the wound tissue, thereby maintaining therapeutic effectiveness while reducing patient discomfort and pain.
2Reliability
If silver electrode coating is used for antiseptic function to prevent inflammation, then sterilization function is improved, but cytotoxicity occurs and human cells are damaged
Solution Approach 1:
The patent extracts the antiseptic function from the electrode coating itself and separates it into a distinct hydrogel layer containing silver ions. This allows the electrodes to be made of biocompatible materials while the antiseptic function is provided by the hydrogel, eliminating cytotoxicity while maintaining sterilization function.
Solution Approach 2:
The patent uses composite materials by combining biocompatible electrode materials (such as conductive polymers or carbon-based materials) with silver-containing hydrogel. This composite structure provides both electrical conductivity and antiseptic function without the cytotoxicity associated with traditional silver electrode coatings.
3Device complexity
If the contact surface of the dressing and wound is dry, then the dressing structure is simple, but the wound and dressing are tightly adhered causing secondary damage during removal
Solution Approach 1:
The patent introduces hydrogel as an intermediary layer between the dressing and the wound. The hydrogel maintains a moist environment that prevents tight adhesion between the dressing and wound tissue, thereby eliminating secondary damage during removal while adding minimal structural complexity.
4Productivity
If a moderately moist environment is provided to facilitate wound healing, then wound healing is promoted, but the dressing must retain moisture which increases complexity
Solution Approach 1:
The patent changes the moisture retention mechanism by using hydrogel materials that can absorb and retain large amounts of water through their three-dimensional network structure. This natural polymer structure provides moisture retention without requiring complex external systems, thereby promoting wound healing while maintaining relatively simple dressing structure.
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 dressing effectively promotes wound healing with reduced irritation, maintains a moist environment, and prevents bacterial infection, leading to faster healing and reduced scarring.
Implementation Method 1
After the hydrogel layers are in contact with a wound and absorb tissue fluid from the wound
Implementation Method 2
the second electrode and the first electrode generate current conduction via the hydrogel layers
Implementation Method 3
establish a plurality of bioelectric fields promoting wound healing
Implementation Method 4
a hydrophobic base fabric
Data Source
AI summary
A wound care dressing is provided, including a hydrophobic base fabric, a plurality of electrode pairs, a plurality of hydrogel layers, and a waterproof thin film. The hydrophobic base fabric has a first surface and a second surface opposite to each other. The electrode pairs are arranged in an array and disposed on the first surface of the hydrophobic base fabric. The hydrogel layers are not in contact with one other, and each hydrogel layer covers a top surface and side walls of each electrode in the electrode pairs. After the hydrogel layers are in contact with a wound and absorb tissue fluid from the wound, the hydrogel layers form a restrictive electronic cycling channel with the electrode pairs to establish a plurality of bioelectric fields promoting wound healing on a surface of the wound. The waterproof thin film is disposed on the second surface of the hydrophobic base fabric.