Multi-Layer Compression Bandage With Adhesive Foam Inner Layer
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Solution Overview
Problem
Current multi-layer compression bandage systems for treating venous leg ulcers are prone to slipping and wrinkling, especially on patients with unusual leg dimensions, leading to reduced effectiveness and discomfort, as they fail to maintain even pressure and can expose wounds.
Innovation Solution
A multi-layer compression bandage system with a wet paste inner layer, a conforming bandage for absorption, a light compression bandage for graduated pressure, and a self-cohesive outer layer, providing up to 30-40 mmHg compression and reducing slipping and wrinkling, suitable for patients with larger or irregularly shaped legs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cotton roll or padding layer is used as the inner layer of a multi-layer compression bandage system, then cushioning and pressure redistribution are provided, but the layer does not grip well to the skin and tends to settle or slip, form wrinkles, and roll down the leg
Solution Approach 1:
The patent combines a cotton roll layer with a foam adhesive layer to create a composite inner layer. The cotton roll provides cushioning and pressure redistribution, while the foam adhesive layer provides skin adhesion and prevents slipping. This composite structure resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The foam adhesive layer acts as an intermediary between the cotton roll layer and the skin. It provides the adhesive bonding function that the cotton roll lacks, while allowing the cotton roll to maintain its cushioning function. This intermediary layer resolves the contradiction by adding the missing adhesion property without compromising the cushioning function.
2Reliability
If additional cotton padding is added to the narrowest part of the leg, then some reduction in sliding or rolling is achieved, but the effectiveness is limited particularly with more mobile patients
Solution Approach 1:
The patent applies adhesive foam material specifically at the inner layer where skin contact is needed, rather than adding padding throughout. This localized application of adhesive property provides anti-slip functionality where it is most needed (at the skin interface) without unnecessarily increasing overall bandage complexity.
3Adaptability or versatility
If the bandage system is applied to patients with unusual leg dimensions (large calf circumference, small ankle circumference), then treatment coverage is improved, but the bandage is more prone to sliding down due to gravity and movement
Solution Approach 1:
The combination of cotton roll material with foam adhesive material creates a composite inner layer that adapts to various leg shapes while maintaining stability. The adhesive foam component specifically addresses the sliding problem on unusual leg dimensions by providing consistent skin adhesion regardless of leg geometry.
4Stress or pressure
If settling or slipping of a compression bandage occurs, then the desired pressure is not maintained or becomes uneven, but removing the dressing may cause new wounds or expose the wound
Solution Approach 1:
The patent employs a disposable adhesive foam layer that can be applied once and maintains its adhesive properties throughout the dressing wear period. This allows the full dressing to remain in place without slipping, eliminating the need for removal and reapplication, thereby preventing wound exposure and trauma.
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 system maintains even compression and reduces the likelihood of slipping and wrinkling, enhancing comfort and wound healing by adhering to the skin and providing consistent pressure for up to 7 days, making it suitable for patients with venous leg ulcers and related conditions.
Implementation Method 1
The first layer is provided as a wet paste roll, which when applied as the first layer will grip to the skin
Implementation Method 2
a conforming bandage for absorption
Implementation Method 3
a self-cohesive outer layer, providing up to 30-40 mmHg compression
Data Source
AI summary
A multi-layer compression bandage system (the “Sandy Boot”) for treating patients having chronic venous insufficiencies and related conditions, including a first skin-contacting layer applied as a wet paste roll over the treated area, which bandage system is less prone to forming wrinkles, conforms well to the circumference of any shaped leg, adheres well to moist or dry skin due to its pliability, and resists slipping or rolling down the leg better than traditional bandage systems, thereby enhancing wound healing.