Wound Dressing with Segmented Oxygen Distribution Channels
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Solution Overview
Problem
Patients with compromised vascular delivery of oxygen to wounds, such as venous stasis ulcers and diabetic foot ulcers, face inadequate oxygen supply for healing due to restricted access by occlusive dressings and limited portability of existing oxygen therapy systems, leading to inconsistent and patchy oxygen diffusion.
Innovation Solution
A wound dressing with an occlusive layer, a spacer material containing distribution channels, and a conduit system that ensures consistent and balanced oxygen delivery to all areas of the wound, including those with exudate saturation, using multiple apertures and channels to minimize pressure drop and prevent blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If occlusive dressings are used to maintain a moist wound environment, then wound moisture is maintained, but oxygen access to hypoxic tissues is restricted
Solution Approach 1:
The dressing is segmented into multiple functional layers: an occlusive outer layer to maintain moisture, a spacer layer with distribution channels to deliver oxygen, and an absorbent layer to manage exudate. This segmentation allows simultaneous achievement of moisture retention and oxygen delivery by dividing the dressing into specialized zones that perform different functions.
Solution Approach 2:
The spacer material with distribution channels acts as an intermediary between the oxygen source and the wound bed. It facilitates oxygen transport through its channel network while maintaining the occlusive barrier's moisture-retaining function, thus mediating between the conflicting requirements of oxygen delivery and moisture maintenance.
2Quantity of substance
If traditional oxygen delivery methods are used, then oxygen can be delivered to the wound, but the system is not portable and immobilizes the patient
Solution Approach 1:
The dressing incorporates distribution channels directly into the spacer material, enabling the dressing itself to distribute oxygen throughout the wound bed without requiring external pumping or complex delivery systems. This self-distributing capability eliminates the need for bulky equipment that would restrict patient mobility.
Solution Approach 2:
The patent replaces complex mechanical oxygen delivery systems with a passive diffusion-based approach. Oxygen is delivered through the spacer material's channel network relying on diffusion and pressure equalization rather than active pumping mechanisms, thereby eliminating the need for immobilizing equipment.
3Device complexity
If oxygen is delivered through a single conduit, then the system is simple, but oxygen distribution is inconsistent and patchy
Solution Approach 1:
The single conduit is segmented into multiple distribution channels within the spacer material. Instead of one large conduit, the system divides oxygen flow into multiple smaller channels that spread oxygen more evenly across the wound surface, improving distribution uniformity while maintaining structural simplicity.
Solution Approach 2:
The oxygen delivery system transitions from a one-dimensional single conduit to a two-dimensional network of distribution channels embedded in the spacer material. This dimensional expansion allows oxygen to reach multiple areas of the wound simultaneously, achieving uniform distribution without significantly increasing system complexity.
4Duration of action of moving object
If treatment time is limited to 90 minutes per day, then patient comfort is maintained, but continuous oxygen supply needed for healing is insufficient
Solution Approach 1:
The dressing enables continuous oxygen delivery while the patient is ambulatory, transforming the previously intermittent 90-minute treatments into a continuous process. The portable nature of the dressing allows oxygen therapy to occur throughout the day rather than being confined to brief hospital visits, thereby increasing total oxygen supply.
Solution Approach 2:
The system changes the temporal parameter of oxygen delivery from intermittent (90 minutes daily) to continuous (throughout the day). By enabling prolonged wear and continuous oxygen flux, the total cumulative oxygen dose increases significantly even though the instantaneous delivery rate remains similar.
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 provides a more uniform and continuous oxygen supply to the wound, enhancing healing by maintaining a moist environment and allowing ambulatory patients, reducing the risk of blockages and improving oxygen distribution across the wound surface.
Implementation Method 1
oxygen reaches the cells of such damaged tissue by diffusion
Implementation Method 2
occlusive dressings used with this and some other wound closure methodologies can restrict access
Data Source
AI summary
Examples include devices, systems and methods related to advanced wound therapy dressings. Specific examples are optimized for use with mobile continuous diffusion of oxygen therapy systems for the localized delivery of oxygen to damaged and healing tissues. Examples may utilize a conduit to deliver therapeutic fluids, including for example oxygen, where the conduit comprises a plurality of apertures or perforations. Examples may also include a spacer material with a plurality of distribution channels in fluid communication with the conduit.