Micro-negative pressure foam dressing via thermal expansion
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Solution Overview
Problem
Current negative pressure drainage technologies in clinical use are complex, costly, and lack portability, hindering effective wound healing and patient comfort.
Innovation Solution
A micro-negative pressure foam dressing is developed, comprising an exothermic agent layer, elastic memory piece, liquid absorbing negative pressure pad, contact layer, sealing film, and release films, which generates micro-negative pressure through heat expansion and dissipation, creating a sealed environment for wound healing without the need for complex equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VSD negative pressure technology is used, then wound healing is accelerated, but operation complexity increases and cost increases
Solution Approach 1:
The VSD system is segmented into a disposable foam dressing module (containing wound contact layer, absorbing layer, and sealing layer) and a separate negative pressure generation module. This segmentation allows the complex negative pressure control functions to be isolated while simplifying the wound care application, enabling healthcare providers to apply the dressing without managing complex equipment.
Solution Approach 2:
The foam dressing is designed as a disposable single-use product that integrates all wound care functions (negative pressure application, exudate absorption, and sealing). This eliminates the need for complex reusable equipment and reduces operational complexity while maintaining therapeutic effectiveness.
2Reliability
If VSD negative pressure technology is used, then wound healing is accelerated, but portability decreases
Solution Approach 1:
The disposable foam dressing integrates negative pressure functionality directly into a portable, self-contained unit that can be applied and removed easily. This eliminates the need for bulky, non-portable VSD equipment while maintaining the therapeutic benefits of negative pressure wound healing.
3Stress or pressure
If foam layer is compressed by elastic memory piece, then micro-negative pressure is generated, but foam layer volume decreases
Solution Approach 1:
The elastic memory piece is designed to dynamically adjust its compression force on the foam layer based on temperature changes and foam expansion/contraction cycles. As the foam expands and contracts over time, the elastic memory piece maintains optimal compression to sustain micro-negative pressure while accommodating volume changes.
Solution Approach 2:
The system utilizes temperature parameter changes to control foam expansion and contraction cycles. The foam material's temperature-sensitive expansion properties are leveraged to create rhythmic volume changes that maintain micro-negative pressure without requiring constant external adjustment.
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 solution is simple to operate, cost-effective, portable, and maintains micro-negative pressure for 48 to 72 hours, promoting wound healing and reducing patient pain without adhesive contact with the wound.
Implementation Method 1
heat generated by an exothermic agent layer causes an elastic memory piece to expand downward to compress a foam layer
Implementation Method 2
an elastic memory piece to expand downward to compress a foam layer
Implementation Method 3
a micro-negative pressure is generated since a sealed environment is formed by a sealing film, a contact layer and a wound surface
Data Source
AI summary
A micro-negative pressure foam dressing and a manufacturing method thereof is disclosed, the dressing comprises a exothermic agent layer, an isolation component covering on the exothermic agent layer, an elastic memory piece disposed under the exothermic agent layer, a liquid absorbing negative pressure pad disposed under the elastic memory piece, a contact layer disposed under the liquid absorbing negative pressure pad, a sealing film disposed between the liquid absorbing negative pressure pad and the contact layer, and a bottom release film disposed under the contact layer; and in this invention, heat generated by a exothermic agent layer causes an elastic memory piece to expand downward to compress a foam layer, and after the heat dissipates completely, a micro-negative pressure is generated since a sealed environment is formed by a sealing film, a contact layer and a wound surface without a need for the VSD negative pressure technology.