Wound Feature Mapping via Electrical Impedance Tomography
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Solution Overview
Problem
Current methods for monitoring wound healing are invasive and struggle to accurately measure healing in open-wound voids and subdermal feature voids, particularly in determining wound volumes that include unseen subdermal volumes.
Innovation Solution
A method and system using an array of electrodes to apply electrical signals to periwound tissue, collect electrical measurements, and process them to generate impedance maps, which are then converted into tissue characteristics maps representing clinical metrics of the wound bed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If invasive methods are used to monitor wound healing, then measurement precision may be improved, but patient comfort and ease of operation deteriorate
Solution Approach 1:
The patent replaces invasive mechanical measurement methods with electrical impedance-based sensing. An array of electrodes applies electrical signals to periwound tissue and measures impedance changes, which are then processed to generate impedance maps and tissue characteristic maps. This electrical field-based approach provides accurate wound depth, granulation tissue thickness, and epithelial coverage measurements without physical intrusion into the wound bed, thereby maintaining measurement precision while improving patient comfort.
2Device complexity
If traditional measurement methods are used, then device complexity is reduced, but the ability to measure subdermal features and wound volumes deteriorates
Solution Approach 1:
The patent transitions from surface-level visual inspection to three-dimensional electrical impedance tomography. By applying electrical signals through an array of electrodes and measuring impedance variations at multiple points, the system reconstructs cross-sectional impedance maps that reveal subdermal features, wound cavity depth, and internal tissue characteristics. This dimensional transition from 2D surface observation to 3D electrical field mapping enables detection of previously invisible subdermal structures while maintaining reasonable device complexity through standardized electrode arrays and processing algorithms.
3Ease of operation
If visual inspection methods are used, then ease of operation is maintained, but measurement precision of wound depth and internal features deteriorates
Solution Approach 1:
The patent introduces electrical impedance as an intermediary parameter that bridges the gap between simple electrical measurements and complex wound morphology. The electrodes measure electrical impedance, which serves as a mediator reflecting underlying tissue characteristics including wound depth, granulation tissue formation, and epithelial coverage. This intermediary approach allows automated processing of electrical signals into detailed tissue characteristic maps while maintaining ease of operation through non-invasive electrode application and computer-based analysis.
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 non-invasive, accurate monitoring of wound healing by providing detailed spatial distributions of clinical metrics, including wound depth, granulation tissue thickness, and epithelial coverage, thereby aiding in the assessment of treatment effectiveness and wound progression.
Implementation Method 1
applying, via an array of electrodes, an electrical signal to a periwound tissue outside the wound bed; collecting, via a circuitry functionally connected to the array of electrodes, electrical measurements from the array of electrodes
Implementation Method 2
processing, via a processor, the collected electrical measurements to generate one or more impedance maps of the wound bed
Data Source
AI summary
Systems and methods for mapping wound features of a wound bed and also detecting degradation of electrode or connectivity performances are provided. Electrical measurements are collected from an array of electrodes which apply electrical signals to a periwound tissue outside the wound bed. The electrical measurements are processed to generate an impedance map of the wound bed, which is converted to maps conveying spatial distributions of clinical metrics.