Occlusive Wound Dressing With Bacteriostatic Agent
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Solution Overview
Problem
Existing occlusive wound dressings lack effective antimicrobial properties and stability, particularly for exuding wounds like pressure sores, ulcers, and burns, where moisture retention and infection prevention are critical.
Innovation Solution
A method involving a hydrophobic occlusive composition with a bacteriostatic agent, such as petrolatum and bismuth tribromophenate, applied to a fabric substrate, packaged with gamma radiation sterilization to create a sealed, antimicrobial occlusive dressing that maintains a moist environment and inhibits aging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If occlusive wound dressings are made without absorbent material to maintain moisture at the wound bed, then moisture retention is improved, but antimicrobial properties deteriorate
Solution Approach 1:
The patent combines the occlusive composition (petrolatum-based) with bacteriostatic agents (such as bismuth tribromophenate, silver, or other antimicrobial compounds) to create a unified dressing material that simultaneously provides moisture retention and antimicrobial protection. This merging of functions allows the dressing to maintain the moist wound environment while actively preventing bacterial growth, resolving the contradiction between moisture retention and antimicrobial properties.
Solution Approach 2:
The invention uses composite materials by incorporating multiple substances into the occlusive composition: petrolatum as the base occlusive material, combined with bacteriostatic agents, and optionally absorbent materials. This composite approach enables the dressing to exhibit multiple properties including occlusivity, antimicrobial activity, and controlled absorbency, thereby achieving both moisture retention and infection prevention without compromising either function.
2Ease of operation
If occlusive composition is applied to fabric substrate, then non-adherent properties are improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs preliminary action by pre-mixing the occlusive composition with bacteriostatic agents before application to the fabric substrate. The composition is prepared in advance as a slurry or paste, which is then applied to the fabric using standard coating techniques. This preliminary preparation simplifies the overall manufacturing process by consolidating multiple steps into a single coating operation, reducing the complexity that would otherwise arise from separate application steps.
Solution Approach 2:
The fabric substrate serves as an intermediary carrier that facilitates the application and distribution of the occlusive composition. By applying the composition to the fabric rather than directly to the wound, the manufacturing process becomes simpler and more controllable. The fabric acts as a mediator that allows for uniform distribution of the composition and enables standard textile processing techniques to be used, thereby reducing manufacturing complexity while maintaining non-adherent properties.
3Duration of action of stationary object
If gamma radiation sterilization is applied to sealed package, then shelf life is improved, but energy consumption increases
Solution Approach 1:
The patent applies preliminary action by sealing the package before gamma radiation sterilization. The packaging is prepared and sealed in advance, which allows the sterilization process to be performed efficiently on the complete assembly. This sequencing of operations enables the gamma radiation to sterilize the sealed package in a single process step, improving shelf life while minimizing energy consumption compared to alternative sterilization methods or repeated processing.
Solution Approach 2:
The invention replaces mechanical or chemical sterilization methods with gamma radiation sterilization. Gamma radiation provides a highly effective sterilization mechanism that penetrates sealed packages, ensuring thorough sterilization without the need for high-temperature processing or extensive chemical treatments. This substitution achieves superior shelf life protection with reduced energy consumption compared to traditional sterilization approaches.
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 method produces occlusive wound dressings with enhanced non-adherent properties and antimicrobial efficacy, providing a stable, moist environment for wound healing while reducing the risk of infection and extending shelf life.
Implementation Method 1
a hydrophobic occlusive composition with a bacteriostatic agent, such as petrolatum and bismuth tribromophenate
Implementation Method 2
irradiating the sealed package to produce the occlusive wound dressing
Implementation Method 3
introducing water on at least one of the coated fabric and the portion of the first packaging member
Data Source
AI summary
A method of preparing an occlusive wound dressing involves preparing a slurry of an occlusive composition with a hydrophobic compound and a bacteriostatic agent, applying the occlusive composition on a fabric to produce a coated fabric, disposing the coated fabric in packaging, adding water onto at least one of the coated fabric and the packaging, sealing the packaging containing the coated fabric, and irradiating the sealed package to sterilize and produce the occlusive wound dressing. The occlusive wound dressing has from about 60 wt % to about 75 wt % hydrophobic compound, from about 2 wt % to about 5 wt % bacteriostatic agent, from about 2 wt % to about 5 wt % water, and from about 5 wt % to about 36 wt % fabric.