Sealed Chamber Fluid Transport Dressing for NPWT

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing negative pressure wound therapy systems face challenges with complex and costly dressings that are cumbersome to handle and prone to clogging, which can hinder effective fluid transport and comfort during treatment.

Innovation Solution

A fluid transport dressing with sealed chambers filled with chamber fluid, designed to maintain fluid transport capability under negative pressure without expanding and clogging, featuring a cushioning effect and optional conduits for efficient fluid flow, made from plastics materials like polyurethane with controlled chamber pressures and rupture thresholds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional dressings with multiple components are used to provide fluid transport, then fluid transport capability is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvefluid transport capabilityVSAvoiddressing structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The dressing is divided into multiple sealed chambers that are fluidly connected, where each chamber can independently maintain negative pressure while contributing to overall fluid transport. This segmentation allows the system to achieve reliable fluid transport through distributed pressure zones rather than requiring a single complex structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple functional elements (chambers, conduits, sealing layers) are merged into an integrated dressing structure where the chambers and conduits work together as a unified system. This merging reduces the number of separate components needed while maintaining fluid transport capability.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If sealed chambers are subjected to negative pressure, then fluid transport is maintained, but chambers may expand and cause clogging

Engineering Contradiction:

Improvefluid transport maintenanceVSAvoidclogging risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The physical state of the chambers is dynamically managed by controlling the negative pressure parameters. The system operates within a specific pressure range that maintains chamber integrity for fluid transport while preventing expansion that would lead to clogging. Pressure threshold values are established to trigger different chamber behaviors.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system preemptively prevents clogging by establishing pressure thresholds and chamber design parameters that counteract the tendency of chambers to expand under negative pressure. By setting the rupture threshold and initial chamber volume appropriately, the system prevents the harmful effect of clogging before it occurs.

Inventive Principle:

Principle #9Preliminary anti-action

3Productivity

If negative pressure is applied to abdominal wounds, then fluid removal is improved, but tissue discomfort increases

Engineering Contradiction:

Improvefluid removal efficiencyVSAvoidtissue discomfort

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The sealed chambers are pre-filled with fluid at controlled pressure to create a cushioning effect that protects underlying tissue from the direct impact of negative pressure. This cushioning layer is established before treatment begins, allowing efficient fluid removal while preventing tissue discomfort through mechanical protection.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 cost-effective, comfortable, and efficient fluid transport solution for negative pressure wound therapy, reducing the risk of clogging and enhancing treatment efficacy by maintaining fluid flow and cushioning, suitable for abdominal wounds and bridging systems.

Implementation Method 1

when the fluid transport dressing is subjected to a negative pressure, the absolute value of which is less than or equal to 20 mmHg

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Implementation Method 2

the sealed cavities may provide a cushioning effect to the site at which it is used, for instance at or by a wound

Methodology Applied

Scientific EffectPressure distribution: Pascal's Law

Implementation Method 3

at least one fluid conduit is provided between the sealed chambers

Methodology Applied

Scientific EffectPressure-driven flow: Pressure Gradient

Data Source

PatentEP3010462B1Fluid transport dressing

Publication Date: 2017.10.25 MOLNLYCKE HEALTH CARE AB

AI summary

The present disclosure relates to a fluid transport dressing (16) for a negative pressure wound treatment system (10). The fluid transport dressing (16) comprises a plurality of sealed chambers (28) comprising chamber fluid.