Wound Dressing Aperture Slit for Drainage Tube Sealing

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Solution Overview

Problem

Post-operative wound dressings that require drainage are often difficult to apply around drainage tubes due to their inflexible design and need for cutting, which can lead to fiber loss, incomplete sealing, increased infection risk, and leakage.

Innovation Solution

A wound dressing with a thin film or film/foam laminate layer, an absorbent layer, and a central aperture with a slit that accommodates a drainage tube, allowing for conformable application and sealing without cutting, while maintaining bacterial and viral barrier properties and high absorbency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a thin polymeric film and low adherency absorbent pad dressing is used for post-operative wounds, then the dressing provides basic wound coverage and absorption, but the dressing becomes difficult to apply around drainage tubes and requires cutting which releases loose fibers into the wound

Engineering Contradiction:

Improvedressing applicationVSAvoidfiber loss into wound

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The dressing is divided into distinct functional layers: a flexible membrane layer that can be cut without fiber release, and a separate absorbent pad layer. This segmentation allows the membrane to be cleanly cut to accommodate drainage tubes while the absorbent pad remains intact and secure, preventing fiber loss into the wound.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dressing incorporates a flexible polymeric membrane layer that can be easily cut and shaped without releasing loose fibers. This flexible film layer provides a clean cutting surface that can be precisely fitted around drainage tubes, eliminating the fiber loss problem associated with cutting traditional absorbent pads.

Inventive Principle:

Principle #30Flexible shells and thin films

2Quantity of substance

If the absorbent pad is included in the dressing, then wound fluid absorption is improved, but the flexibility of the dressing is greatly reduced making it difficult to apply to certain body areas and uncomfortable to wear

Engineering Contradiction:

Improvewound fluid absorptionVSAvoiddressing flexibility

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The dressing separates the absorbent function (pad) from the flexible conformable function (membrane layer). The membrane layer maintains high flexibility for comfortable wear and easy application, while the absorbent pad provides dedicated fluid absorption capacity. The two layers work together without compromising either flexibility or absorption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dressing combines a flexible polymeric membrane material with an absorbent pad material to create a composite structure. The membrane provides flexibility and conformability, while the pad provides absorption, achieving both properties simultaneously in a single dressing system.

Inventive Principle:

Principle #40Composite materials

3Adaptability or versatility

If the dressing is cut to accommodate the drainage tube, then the drainage tube can be fitted, but a complete seal around the incision cannot be made increasing infection risk and causing leakage

Engineering Contradiction:

Improvedrainage tube accommodationVSAvoidseal completeness

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The dressing design allows the membrane layer to be cut to precisely fit around the drainage tube while maintaining the integrity of the absorbent pad and adhesive borders. This segmentation enables a complete seal to be formed around both the wound and drainage tube, preventing infection and leakage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dressing is designed to accommodate both wound coverage and drainage tube accommodation in a single integrated structure. The flexible membrane layer can be universally adapted to fit various drainage tube sizes and wound configurations while maintaining complete sealing capability through its adhesive borders.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 facilitates easier application and reduces the risk of infection and leakage by accommodating drainage tubes without cutting, providing a conformable and effective barrier for wound fluid absorption.

Implementation Method 1

The thin film or film/foam laminate layer provides a viral and bacterial barrier to the wound

Methodology Applied

Scientific EffectPhysical barrier: Physical Containment

Implementation Method 2

an absorbent layer positioned on the adhesive surface of the thin film layer

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 3

a thin film or film/foam laminate layer with an adhesive applied to one surface thereof

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 4

This allows moisture to evaporate from the dressing

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS7723559B2Wound dressing

Publication Date: 2010.05.25 CONVATEC TECH INC

AI summary

A wound dressing for post-operative sites requiring drainage includes a thin film or film/foam laminate layer with an adhesive applied to one surface thereof and an absorbent layer positioned on the adhesive surface. The dressing has an aperture to accommodate a drainage tube and a slit extending from the aperture to an outer edge of the dressing.