Superabsorbent Gel Wound Dressing for Negative Pressure Therapy
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Solution Overview
Problem
Current negative pressure wound therapy devices face issues such as foam sticking to the wound, tissue trauma during dressing changes, and inefficient fluid removal due to foam compression, which can hinder wound healing.
Innovation Solution
A device incorporating an air-impermeable covering material connected to a negative pressure source and an activated suction/rinsing body containing superabsorbent polymers, which absorbs and retains wound exudate, reducing sticking and promoting gentle, effective treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If foam pads are used for negative pressure therapy, then fluid removal is enabled, but the foam compresses and narrows passages reducing fluid removal efficiency
Solution Approach 1:
The patent changes the physical state of the absorbent material from dry foam to pre-activated gel form. The gel-forming polymer is activated before use by adding water or saline, transforming it from a rigid foam structure to a soft, conformable gel that maintains open passages while absorbing fluid, thus resolving the contradiction between fluid removal and passage narrowing
Solution Approach 2:
The patent uses composite materials combining gel-forming polymers (such as cross-linked polyacrylate gels or superabsorbent gels) with wound contact layers. This composite structure provides both the absorbency needed for fluid removal and the softness needed to maintain open passages, eliminating the compression problem of traditional foam
2Duration of action of stationary object
If polyvinyl alcohol or polyurethane foam is used for prolonged treatment, then negative pressure therapy is maintained, but the foam sticks to the wound base causing tissue trauma
Solution Approach 1:
The patent changes the material parameter from traditional foam to gel-forming polymer. The gel structure fundamentally alters the interface properties with wound tissue, preventing adhesion while maintaining therapeutic function over prolonged periods, thus eliminating sticking and tissue trauma
Solution Approach 2:
The gel-forming polymer dressing is designed as a disposable component that is replaced during dressing changes. This eliminates the cumulative sticking problem that occurs with prolonged foam use, as each new dressing starts fresh without adhering to the wound base
3Power
If traditional foam dressings are used, then negative pressure is applied, but the dressings require complicated rinsing procedures and liquid traps
Solution Approach 1:
The patent extracts the fluid retention function from the external pump system and integrates it into the dressing itself. The gel-forming polymer absorbs and retains wound exudate within its matrix, eliminating the need for external liquid traps and complex rinsing systems while maintaining effective negative pressure therapy
Solution Approach 2:
The gel-forming polymer performs self-service by automatically absorbing and retaining fluid through its gel structure. This self-containing capability eliminates the need for external fluid management systems, simplifying the overall device while maintaining therapeutic effectiveness
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 device provides a soft, evenly pressure-distributed wound dressing that minimizes trauma during dressing changes and enhances wound healing by maintaining a moist environment, promoting granulation tissue growth and reducing infection risk through effective fluid management.
Implementation Method 1
an activated suction/rinsing body, which contains at least one superabsorbent polymer, for introduction into the space formed by the wound surface and covering material
Implementation Method 2
which can form a gel by absorbing water from the wound exudate
Implementation Method 3
a means for functionally connecting the wound space to a negative pressure source located outside the covering material, so that a negative pressure can be produced in the wound space and fluids out can be suctioned from the wound area
Implementation Method 4
fluids out can be suctioned from the wound area
Data Source
Figure 1~3
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AI summary
Device for negative pressure wound therapy comprising an airtight covering material (1), a means for functionally connecting the wound space (4) with a negative pressure source located outside the covering material, and at least one activated suction/irrigation element (3) which contains at least one superabsorbent polymer.