Multiplexed Wound Dressing Electrodes for Replacement Timing
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Solution Overview
Problem
Existing wound dressings lack effective monitoring capabilities to determine the optimal time for replacement, leading to potential adhesive failure, leakage, and unsatisfactory wound healing conditions due to early or late changes.
Innovation Solution
A wound dressing system with integrated electrodes and a multiplexer that facilitates real-time monitoring of moisture and wetting patterns, allowing for precise determination of the optimal replacement time and ensuring proper wound healing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wound dressings are changed frequently to ensure proper wound healing, then wound healing quality is improved, but material waste and cost increase
Solution Approach 1:
The wound dressing incorporates sensors that continuously monitor wound conditions (moisture, pH, temperature, exudate composition) and provide feedback to determine the optimal replacement timing. This eliminates the need for frequent predetermined changes, allowing dressings to remain in place until actually needed, thus reducing material waste while maintaining wound healing quality.
Solution Approach 2:
The wound dressing system performs self-monitoring of its own functional status and wound conditions through integrated sensors and processing units. This self-assessment capability enables the system to determine when replacement is necessary based on actual condition thresholds, rather than requiring external scheduled changes, thereby optimizing both healing quality and resource utilization.
2Loss of substance
If wound dressings are monitored continuously to determine optimal replacement time, then material waste is reduced, but device complexity increases
Solution Approach 1:
The monitoring system is divided into modular functional units: sensors for specific parameters (moisture, pH, temperature), signal processing circuits, and control logic. Each module performs a discrete function, making the overall complex system manageable, manufacturable, and scalable. This segmentation allows continuous monitoring capability while controlling complexity through functional decomposition.
Solution Approach 2:
The wound dressing system integrates multiple sensing capabilities (moisture, pH, temperature, exudate composition) and communication functions into a single multi-functional platform. This universal design consolidates what would otherwise require separate devices, reducing overall system complexity while enabling comprehensive monitoring to optimize replacement timing and reduce material waste.
3Measurement precision
If multiple sensors are integrated into the wound dressing to monitor various parameters, then monitoring precision is improved, but device complexity increases
Solution Approach 1:
Multiple sensing functions (moisture detection, pH measurement, temperature sensing, exudate composition analysis) are integrated into a single electrode assembly structure. The sensors share common structural elements, substrate, and signal processing pathways, combining multiple measurement capabilities into one unified component rather than separate assemblies, thereby improving monitoring precision while controlling complexity through integration.
4Reliability
If wound dressings are changed early to prevent adhesive failure, then reliability is improved, but loss of time and productivity decrease
Solution Approach 1:
The wound dressing incorporates sensors that continuously monitor adhesive condition and wound bed status, providing real-time feedback on dressing integrity and performance. This feedback enables determination of the actual optimal replacement timing based on measured parameters rather than predetermined schedules, allowing dressings to remain in place as long as conditions permit, thus reducing unnecessary early replacements and associated time loss while maintaining reliability through timely detection of adhesive degradation.
Data Source
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AI summary
A wound dressing is disclosed. A wound dressing comprises a first adhesive layer, an electrode assembly, a monitor interface and a multiplexer. The first adhesive layer comprises a proximal surface configured for attachment of the wound dressing to a skin surface of a user. The electrode assembly comprises a plurality of electrodes including a first set of first electrodes. The monitor interface is configured to form a mechanical and electrical connection with a monitor device. The monitor interface comprises a coupling part and a plurality of terminals including a first terminal. The multiplexer comprises a number of N input pins and a number of M output pins. The N input pins include a first set of first input pins for connection to first electrodes of the first set of first electrodes, the first set of first pins including a first primary input pin and a first secondary input pin, and the M output pins include a first output pin. The first primary input pin is connected to a first primary electrode of the first set of first electrodes and the first secondary input pin is connected to a first secondary electrode of the first set of first electrodes, and the first output pin is connected to the first terminal of the monitor interface. The multiplexer is configured to connect the first primary input pin to the first output pin in a first multiplexer configuration and to connect the first secondary input pin to the first output pin in a second multiplexer configuration.