NPWT System Using Eulerian Video Magnification for Wound Monitoring
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Solution Overview
Problem
Current wound dressings for negative pressure wound therapy (NPWT) lack effective visualization and information about the wound site, leading to premature dressing changes and inadequate assessment of wound healing progress.
Innovation Solution
A wound therapy system incorporating a source of negative pressure, a visualization sensor to collect video data, and a controller that adjusts pressure based on treatment factors determined from the video data, using Eulerian video magnification to amplify subtle changes in the wound condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wound dressing is placed over the wound to provide negative pressure therapy, then wound healing is promoted through fluid removal and granulation tissue formation, but visualization and information about the wound site condition is lost
Solution Approach 1:
The patent applies colorimetric indicators that change color in response to wound conditions such as pH levels, oxygen tension, or presence of bacteria. These color changes are visible through the semi-permeable membrane of the dressing, allowing clinicians to assess wound healing progress and detect complications without removing the dressing. This resolves the contradiction by providing visual information while maintaining the sealed negative pressure environment necessary for effective wound healing.
Solution Approach 2:
The patent introduces an intermediary sensing layer or indicator system between the wound and the external environment. This intermediary layer contains sensors or chemical indicators that translate internal wound conditions into visible external signals, enabling wound monitoring while preserving the integrity of the negative pressure therapy system.
2Loss of information
If the dressing is changed frequently to monitor wound condition, then wound site information is obtained, but treatment time is lost and healing process is disrupted
Solution Approach 1:
The patent enables continuous monitoring of wound conditions through the intact dressing using embedded sensors or colorimetric indicators. This allows clinicians to observe wound healing progress, fluid accumulation, and potential complications in real-time without interrupting the negative pressure therapy, thereby maintaining continuous treatment action and eliminating time loss associated with frequent dressing changes.
Solution Approach 2:
The patent incorporates feedback mechanisms through visual indicators or electronic sensors that provide real-time information about wound conditions. This feedback allows clinicians to make informed decisions about treatment adjustments without removing the dressing, enabling continuous monitoring and reducing the frequency of dressing changes while maintaining effective wound management.
3Productivity
If absorbent dressings are used to manage wound fluid, then fluid removal is enhanced, but the full absorbent capacity must be reached before clinician inspection is possible
Solution Approach 1:
The patent introduces an intermediary indicator system within the absorbent dressing that provides visual information about wound status independent of the absorbent capacity. Chemical sensors or colorimetric indicators detect parameters such as pH changes, oxygen levels, or bacterial presence and transmit this information externally, allowing clinicians to assess wound conditions at any time during the dressing wear period, not just when absorbent capacity is exhausted.
Solution Approach 2:
The patent replaces the mechanical limitation of physical inspection (requiring dressing removal after full absorption) with a chemical or optical sensing system. This substitution allows continuous monitoring of wound status through chemical indicators or electronic sensors that provide information without being constrained by the physical absorbent capacity of the dressing material.
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
Enhances wound monitoring by allowing real-time adjustment of negative pressure to optimize healing, providing improved visualization and data-driven decision-making for healthcare providers.
Implementation Method 1
a visualization sensor positioned above the wound, the visualization sensor configured to collect video data of the wound
Implementation Method 2
a source of negative pressure configured to be in fluidic communication with a wound dressing placed over a wound, the source of negative pressure configured to provide negative pressure under the wound dressing
Data Source
AI summary
Embodiments of tissue monitoring in combination with negative pressure wound therapy systems and methods are disclosed. In some embodiments, a monitoring and therapy system comprises collecting video images of a tissue site and amplifying said video images via Eulerian Video Magnification. Depending upon the changes detected via Eulerian Video magnification, negative pressure wound therapy may be delivered to the tissue site, stopped, or altered in some manner.