Liquid-Activated Wound Dressing for Dynamic Transparency

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Solution Overview

Problem

Existing wound dressings are either partially or fully occlusive, making it difficult for clinicians to view the progress of treatment and requiring a solution that allows selective and dynamic transparency for wound visualization.

Innovation Solution

A wound therapy dressing with a drape layer that changes transparency based on the application of a disclosing liquid, allowing clinicians to view the wound when needed and occlude it at other times, featuring a refractive index range of 1.3 to 1.55 and materials like PVF and PVDF, and a system with a negative pressure input device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a wound dressing is made occlusive to protect the wound, then wound protection and patient privacy are improved, but clinician visualization of the wound is worsened

Engineering Contradiction:

Improvewound protectionVSAvoidwound visualization

Core Design Contradiction:

ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The drape layer is designed to dynamically change its optical properties from opaque to transparent upon application of a disclosing liquid. This dynamic transition allows the dressing to adapt between protecting the wound (opaque state) and allowing clinician visualization (transparent state), resolving the contradiction between wound protection and visualization capability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The transparency parameter of the drape layer is changed by applying a disclosing liquid with a specific refractive index (1.3 to 1.55). This parameter change transforms the drape from opaque to transparent, enabling clinicians to view the wound while maintaining the protective occlusive structure throughout

Inventive Principle:

Principle #35Parameter changes

2Difficulty of detecting and measuring

If a wound dressing is made transparent to allow clinician visualization, then wound monitoring is improved, but patient privacy and anxiety reduction are worsened

Engineering Contradiction:

Improvewound monitoringVSAvoidpatient anxiety

Core Design Contradiction:

Difficulty of detecting and measuringVSObject-affected harmful factors

Solution Approach 1:

The drape layer dynamically transitions between opaque and transparent states based on clinician need. During patient care moments, it becomes transparent for monitoring; during other times, it remains opaque to protect patient privacy and reduce anxiety, allowing the system to adapt to different operational requirements

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The disclosing liquid is applied periodically only when clinician visualization is needed, creating a periodic transition to transparent state. This periodic action ensures the wound is monitored when necessary while maintaining patient privacy during extended periods when the drape remains opaque

Inventive Principle:

Principle #19Periodic action

3Loss of information

If a static transparent dressing is used to allow wound viewing, then clinician access to wound information is improved, but the ability to provide patient privacy at all times is worsened

Engineering Contradiction:

Improvewound information accessVSAvoidpatient privacy control

Core Design Contradiction:

Loss of informationVSEase of operation

Solution Approach 1:

Rather than using a static transparent dressing, the invention employs a dynamic drape layer that transitions between opaque and transparent states. This dynamic capability provides clinicians with controlled access to wound information only when the disclosing liquid is applied, while maintaining patient privacy control during all other times

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The disclosing liquid acts as an intermediary that temporarily changes the optical properties of the drape layer. This intermediary substance enables controlled information access without permanently compromising patient privacy, as the transparency effect is temporary and reversible upon liquid evaporation or removal

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enables clinicians to accurately monitor wound healing and fluid levels while reducing patient anxiety by providing selective wound visibility and maintaining privacy.

Implementation Method 1

a drape layer having a material with a refractive index substantially within a range of 1.3 to 1.55... when a disclosing liquid with a refractive index within a range of the refractive index of the drape layer is applied to the drape layer

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS12403213B2Wound dressing with selective and dynamic transparency

Publication Date: 2025.09.02 SOLVENTUM INTELLECTUAL PROPERTIES CO

AI summary

A selectively transparent wound therapy dressing, system, and method of use are provided. The dressing may include conformable foam and drape layers, wherein the drape layer has a refractive index substantially within a range of a disclosing liquid. When the disclosing liquid is applied to the drape layer, the drape layer may switch from opaque to transparent. Subsequent evaporation of the disclosing liquid may return the drape layer to an opaque state. Some embodiments provide for paired use with a negative pressure source input device. The method of use provides selective visibility of a treatment site, and reduces the amount of time in which a patient views an acute or traumatic wound or injury.