Wound Dressing Port Segmentation for Occlusion Prevention

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Solution Overview

Problem

Vacuum wound therapy treatments face challenges due to the migration of filler materials and wound exudates towards airflow, leading to obstruction or occlusion of portal members, which limits exudate flow and reduces treatment effectiveness.

Innovation Solution

A wound dressing with a portal member that includes a primary port and multiple supplemental ports, distributed over the reservoir surface, to establish fluid communication and prevent occlusion, combined with a flexible backing layer for a fluid-tight seal and unidirectional exudate flow, using a contact layer with conical apertures and an absorbent filler material to manage exudates effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single portal member with one aperture is used to establish fluid communication between the vacuum source and reservoir, then the device complexity is minimized, but the portal member becomes prone to occlusion by migrated filler material and wound exudates

Engineering Contradiction:

Improveportal member patencyVSAvoidportal member structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The portal member is segmented into multiple apertures (first aperture, second aperture, third aperture) instead of using a single aperture. This segmentation allows the system to maintain fluid communication pathways even when some apertures become occluded by migrated filler material or wound exudates, thereby improving reliability without significantly increasing overall device complexity.

Inventive Principle:

Principle #1Segmentation

2Productivity

If the reservoir surface area is increased to improve exudate collection, then the productivity of exudate removal is enhanced, but the likelihood of filler material migration and portal occlusion increases

Engineering Contradiction:

Improveexudate removal efficiencyVSAvoidportal member patency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Multiple apertures are distributed across the reservoir surface, allowing the system to collect exudates from a large area while maintaining reliable fluid communication. Even if filler material migrates and occludes some apertures, the segmented design ensures that other apertures remain patent, preserving the productivity of exudate removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the reservoir surface have apertures positioned at specific locations to optimize local exudate collection. The apertures are strategically placed to maximize coverage of the wound area while minimizing the risk of complete occlusion, balancing productivity and reliability.

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If a flexible backing layer with adhesive periphery is used to maintain fluid-tight seal, then the reduced pressure can be maintained over time, but the filler material may still migrate towards the portal member in the direction of airflow

Engineering Contradiction:

Improvefluid-tight seal integrityVSAvoidfiller material migration

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The multiple aperture design segments the airflow pathways, so that even if filler material migrates towards the portal member, it can only occlude specific apertures rather than completely blocking the entire portal member. This maintains the fluid-tight seal integrity while mitigating the harmful effect of filler material migration.

Inventive Principle:

Principle #1Segmentation

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 solution maintains a reduced pressure over the wound, promoting healing by effectively drawing exudates and preventing infection, while minimizing the risk of occlusion and maintaining treatment effectiveness.

Implementation Method 1

a suction device adapted for application of negative pressure to the reservoir to draw exudates from the wound

Methodology Applied

Scientific EffectNegative pressure: Pressure Gradient

Implementation Method 2

an absorbent filler material positioned in the wound and adapted to absorb exudates from the wound

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS9956329B2Wound dressing port and associated wound dressing

Publication Date: 2018.05.01 SMITH & NEPHEW INC

AI summary

A wound dressing for use in a vacuum wound therapy treatment includes a backing layer for positioning over a wound to define a reservoir in which a reduced pressure may be maintained over the wound. A portal member affixed to the backing layer provides a connection to a reduced pressure source through an opening in an ambient surface. A primary port extends between the opening and a primary aperture in a reservoir surface to providing fluid communication between the reservoir and the reduced pressure source. At least one supplemental port establishes fluid communication between the primary port and a supplemental aperture in the reservoir surface that is distinct and substantially spaced from the primary aperture.