Sensor Integrated Dressing Safety Circuit Design
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Solution Overview
Problem
Current medical treatments often lack real-time, quantitative data on tissue conditions, relying on visual inspection, which can be inadequate for accurate monitoring and treatment, especially in wound care and orthopedic treatments, where underlying tissue damage may not be visible.
Innovation Solution
Integration of sensors into substrates and dressings that can be used on the skin or incorporated into clothing and medical devices to collect and transmit data on tissue conditions, including temperature, blood flow, and biochemical activity, enabling more informed diagnostic and management decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection is used for wound treatment monitoring, then the treatment process is simple and does not require complex equipment, but the measurement precision and reliability of tissue condition data are insufficient
Solution Approach 1:
The patent replaces visual inspection (mechanical/optical system) with optical sensors and light sources that emit and detect light to measure tissue conditions quantitatively. The optical sensor detects light properties (intensity, wavelength) that correlate with tissue health parameters, providing objective measurement instead of subjective visual assessment.
Solution Approach 2:
The patent introduces an intermediary optical measurement system between the caregiver and the tissue. The light source and optical sensor act as intermediaries that translate tissue conditions into measurable optical signals, which are then processed to provide quantitative data about tissue health, oxygenation, and healing progress.
2Loss of information
If sensor integrated dressings are used to collect real-time tissue data, then the measurement precision and information quality improve, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the optical sensor, light source, and dressing components into an integrated assembly. The sensor and light source are positioned in direct contact with or adjacent to the tissue, allowing the dressing itself to function as the sensing platform. This integration eliminates the need for separate monitoring equipment and simplifies the overall system while maintaining measurement capability.
Solution Approach 2:
The optical sensor system is designed to monitor multiple tissue parameters simultaneously (oxygenation, perfusion, inflammation, healing progress) using a single integrated dressing. The same basic optical measurement platform can detect different tissue conditions by analyzing various light properties, making the system versatile and reducing the need for multiple specialized devices.
3Reliability
If optical sensors and light sources are integrated into dressings, then real-time quantitative tissue monitoring is achieved, but the risk of light source malfunction and overheating increases
Solution Approach 1:
The patent implements periodic or pulsed operation of the light source rather than continuous operation. The light source is activated in intervals to collect necessary optical data, then deactivated to prevent overheating. This periodic action maintains monitoring reliability by gathering data at appropriate intervals while reducing thermal accumulation and energy consumption.
Solution Approach 2:
The patent incorporates safety circuits and thermal management design before the light source can overheat. The system includes pre-designed protection mechanisms such as temperature monitoring, automatic shutdown circuits, and thermal dissipation pathways that prevent overheating before it occurs, ensuring reliable operation without harmful effects.
4Object-affected harmful factors
If safety circuits are added to prevent light source malfunction, then the system reliability and patient safety improve, but the device complexity increases
Solution Approach 1:
The safety circuit is designed to automatically monitor and protect the light source without requiring external intervention or complex control systems. The circuit self-monitors light source operation, detects abnormal conditions (overheating, malfunction), and automatically activates protection mechanisms such as shutdown or power reduction, making the system self-protecting and reducing overall complexity.
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
Provides real-time, quantitative data for improved monitoring and treatment of tissues, enhancing wound healing, orthopedic rehabilitation, and surgical procedures by offering continuous feedback on tissue health and potential complications.
Implementation Method 1
an optical sensor and a light source... the optical sensor detects light properties that correlate with tissue health parameters
Implementation Method 2
light source that emits light and a light sensor or detector that detects light reflected by the wound
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A wound dressing can include a substantially flexible substrate with a first, wound-facing side supporting a plurality of electronic components and a second side opposite the first side. The plurality of electronic components can include a light source, a resistor-capacitor (RC) network, and at least one switch electrically connected to the light source and to the RC network. The at least one switch can be configured to, in a first state, permit power to be supplied to the light source and, in a second state, prevent power being supplied to the light source.