Smart Bandage CMOS Sensor for Wound Monitoring
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Solution Overview
Problem
Current wound healing monitoring relies heavily on visual observation and lacks effective, cost-efficient methods to track the initial processes of hemostasis and inflammation, leading to prolonged healing times and potential infections in chronic wounds.
Innovation Solution
Integration of inexpensive complementary metal-oxide semiconductor (CMOS) chips into bandages, equipped with wireless communication and sensors to detect chemical and biological parameters, including thrombin, fibrinogen, and oxygen levels, providing real-time data on wound healing progress and infection detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual observation is used for wound monitoring, then the method is simple and low-cost, but it lacks precision and cannot effectively track initial healing processes
Solution Approach 1:
The patent extracts the monitoring function from complex clinical settings and embeds it directly into a simple bandage device. The CMOS sensor chip is integrated into the bandage, allowing precise measurement of wound parameters (pH, temperature, electrical properties) to be taken directly at the wound site without requiring complex external monitoring equipment.
Solution Approach 2:
The patent uses CMOS technology, originally developed for digital imaging, and adapts it for biomedical sensing. By copying the成熟的CMOS manufacturing processes and applying them to wound sensor fabrication, the patent achieves high measurement precision while keeping device complexity low through standardization.
2Measurement precision
If advanced sensors are integrated into bandages to monitor chemical and biological parameters, then monitoring precision improves, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent changes the physical and chemical parameters of the sensor by functionalizing the CMOS chip surface with specific biomolecules (aptamers, enzymes) that bind to target analytes. This functionalization allows the sensor to detect specific chemical and biological parameters (thrombin, fibrinogen, pH) with high precision while maintaining compatibility with standard bandage manufacturing processes.
Solution Approach 2:
The patent designs a universal CMOS-based sensor platform that can detect multiple wound parameters (pH, temperature, electrical impedance, specific biomolecules) using a single integrated chip. This multi-functionality reduces the need for multiple separate devices, simplifying manufacturing while maintaining high measurement precision across different parameters.
3Productivity
If disposable smart bandages are produced through mass production, then cost decreases, but ensuring consistent sensor performance across all units becomes more challenging
Solution Approach 1:
The patent embraces the disposable nature of the bandage, designing the CMOS sensor chip to be integrated into a single-use product. This approach allows for simplified quality control where each unit is independently manufactured and tested, ensuring consistent performance without the complexity of reusability. The disposable nature also eliminates the need for sterilization and maintenance, improving reliability.
Solution Approach 2:
The patent utilizes standard CMOS fabrication parameters and processes that are already highly controlled in semiconductor manufacturing. By leveraging these established manufacturing parameters, the patent ensures consistent sensor performance across mass-produced units while maintaining cost-effectiveness through economies of scale.
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 precise monitoring of wound healing processes, accelerates healing by providing actionable data for medical treatments, and reduces costs through mass production of disposable smart bandages, potentially shortening healing times and improving outcomes for chronic wound patients.
Implementation Method 1
attaching the thrombin binding aptamer with the thiol group to the gold surface of the working electrode
Data Source
AI summary
A sensing chip attached to a bandage monitors the healing process of a wound by detecting growth factors, thrombin and fibrinogen. The complementary metal-oxide semiconductor includes a functionalized working electrode, functionalized counter electrode and functionalized reference electrode. The healing progress is stimulated by generating oxygen in the wound.