Multilayer Chest-Wound Dressing With Single-Step Air-Channel Fusion

Solution Overview

Problem

Conventional chest wound dressings that form air channels between two layers are inefficient and costly due to the need for multiple fusing steps, which can be time-consuming.

Innovation Solution

A medical dressing comprising three or more layers fused together in a single step, with air channels formed between at least two layers, using an annular pattern to join the layers except at specific slots, allowing simultaneous fusion of all layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If multiple fusing steps are used to form air channels between layers, then air channel formation is achieved, but manufacturing time and cost increase

Engineering Contradiction:

Improveair channel formationVSAvoidmanufacturing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent combines multiple fusing operations into a single fusing step by using a multi-layer structure where all layers are fused simultaneously to form air channels. This merging of operations eliminates sequential processing steps, thereby reducing manufacturing time and cost while achieving the same air channel formation objective.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent incorporates air channel slots into the layer structure during the preliminary design and assembly phase, before the fusing process. By pre-positioning the slots that will become air channels, the actual fusing step only needs to join layers around these pre-defined slots, rather than forming complex air channel structures during fusing, thus simplifying and accelerating the manufacturing process.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If multiple fusing steps are used to form air channels between layers, then air channel formation is achieved, but manufacturing cost increases

Engineering Contradiction:

Improveair channel formationVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent combines multiple fusing operations into a single fusing step by using a multi-layer structure where all layers are fused simultaneously to form air channels. This merging of operations eliminates sequential processing steps, thereby reducing manufacturing time and cost while achieving the same air channel formation objective.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent incorporates air channel slots into the layer structure during the preliminary design and assembly phase, before the fusing process. By pre-positioning the slots that will become air channels, the actual fusing step only needs to join layers around these pre-defined slots, rather than forming complex air channel structures during fusing, thus simplifying and accelerating the manufacturing process.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If three or more layers are fused together, then wound coverage and sealing are improved, but forming air channels becomes more complex

Engineering Contradiction:

Improvewound sealingVSAvoidlayer fusion complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the multi-layer structure into distinct functional layers (first layer, second layer, third layer) with specific roles. Each layer contains or forms air channel slots, and the segmentation allows independent design and assembly of each layer before fusion. This modular segmentation reduces the complexity of fusing three or more layers by making each layer's contribution to air channel formation clear and manageable.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent incorporates air channel slots into the layer structure during the preliminary design and assembly phase, before the fusing process. By pre-positioning the slots that will become air channels, the actual fusing step only needs to join layers around these pre-defined slots, rather than forming complex air channel structures during fusing, thus simplifying and accelerating the manufacturing process.

Inventive Principle:

Principle #10Preliminary action

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 reduces time and costs while effectively preventing atmospheric air from entering the pleural space and allowing air to vent from the wound, reducing the risk of pneumothorax.

Implementation Method 1

an adhesive layer on the front surface of the base layer wherein the adhesive layer extends entirely around the opening

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

the base layer, cover layer and intermediate layer joined together along an annular pattern extending entirely around the first and second openings

Methodology Applied

Scientific EffectThermal fusion: Welding

Data Source

PatentUS12447062B2Medical dressing to treat sucking chest wound and methods of forming same

Publication Date: 2025.10.21 SAFEGUARD MEDICAL HOLDCO LLC

AI summary

A medical dressing to treat sucking chest wound, and methods of forming the medical dressing. The methods include the steps of overlaying a cover layer on an intermediate layer and the intermediate layer on a base layer such that openings in the intermediate and base layers are aligned and the cover layer overlays the openings; fusing together the cover layer, the intermediate layer and the base layer by applying an annular welding tool face to at least one of the cover layer and base layer and applying welding energy to the template; and applying an adhesive layer on a side the base layer opposite to the intermediate layer, wherein the adhesive layer extends entirely around the opening.