Multi-Layer Wound Care Device with Capillary Fluid Transfer
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Solution Overview
Problem
Conventional wound care devices fail to effectively manage moisture levels at wound sites, leading to undesirable bacterial growth, protease enzyme production, and delayed healing due to excessive moisture, while insufficient moisture can cause eschar formation and scarring. Additionally, these devices often lose physical integrity during removal, causing discomfort and potential infection.
Innovation Solution
A multi-layer wound care device with a knit construction featuring polyester fibers on the wound contact surface and lyocell fibers on the fluid reservoir surface, incorporating a one-way capillary force pump mechanism for directional fluid transport and enhanced absorption properties, along with an antimicrobial silver coating to prevent infection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wound care devices are used to manage moisture at wound sites, then bacterial growth and protease enzyme production are reduced, but the devices lose physical integrity during removal causing discomfort and potential infection
Solution Approach 1:
The wound care device is divided into multiple layers with distinct functions: a first layer in direct contact with the wound that maintains integrity, and a second layer that facilitates removal. This segmentation allows each layer to perform its specific function optimally without compromising the whole device's integrity during removal.
Solution Approach 2:
An intermediate layer or interface is introduced between the wound-contact layer and the outer layer. This intermediary structure enables controlled separation during removal, preventing the entire device from adhering to and damaging the wound site while maintaining the integrity of the primary wound-contact layer.
2Object-affected harmful factors
If excessive moisture is present at wound site, then bacterial growth and protease enzyme production increase, but insufficient moisture causes eschar formation and scarring
Solution Approach 1:
The device employs different materials with varying absorption properties at different locations: the first layer in contact with the wound has controlled absorption to maintain moisture balance and prevent eschar, while the second layer has higher absorption capacity to draw away excess fluid and prevent bacterial growth. This local differentiation resolves the contradiction between preventing dryness and preventing excess moisture.
Solution Approach 2:
The device utilizes materials with specific absorption parameters - the first layer uses materials with lower absorption capacity to maintain wound moisture, while the second layer uses materials with higher absorption capacity (such as hydrocolloids or alginates) to remove excess fluid. By changing absorption parameters across layers, the device simultaneously prevents both bacterial growth and eschar formation.
3Productivity
If hydrophobic fiber is used on wound contact side and hydrophilic fiber on fluid reservoir side, then one-way directional flow of fluid is created, but device complexity increases
Solution Approach 1:
The fabric construction uses different fiber properties at different surfaces: a hydrophobic outer surface that repels fluid and a hydrophilic inner surface that attracts and transports fluid. This local quality differentiation creates the one-way flow mechanism without requiring complex mechanical structures, achieving high fluid transport efficiency through simple material selection.
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 effectively manages moisture levels, reducing bacterial growth and protease enzyme production, maintains physical integrity during use and removal, and promotes healing by efficiently transporting excess fluid away from the wound site while preventing infection through antimicrobial action.
Implementation Method 1
The wound care device contains capillary force one-way pumps that are capable of transporting fluid, such as wound exudate, away from a wound site
Implementation Method 2
the incorporation of lyocell in the wound care device greatly enhances the absorption properties of the wound care device
Implementation Method 3
the device promotes healing by efficiently transporting excess fluid away from the wound site while preventing infection through antimicrobial action
Data Source
AI summary
This disclosure relates to a multi-layer wound care device having absorption and fluid transfer properties. The wound care device contains capillary force one-way pumps that are capable of transporting fluid, such as wound exudate, away from a wound site to the opposite side of the wound care device, which functions as a segregated fluid reservoir. This fluid transport mechanism generally aids in reducing wound maceration by removing excess wound fluid and the protease enzymes and infectious bacteria contained within the wound fluid. The wound care device performs this function, often times for multiple days, without the loss of the physical integrity of the wound care device. In addition to providing a uni-directional fluid transport mechanism, the wound care device provides improved absorption properties.