Wirelessly Powered Drug-Free and Anti-Infective Smart Bandage for Chronic Wound Care

Area of Science:

• Biomedical Engineering
• Materials Science
• Infectious Disease Research

Background:

• Chronic wounds pose significant challenges in healthcare, often complicated by persistent bacterial infections.
• Current sterilization methods for wound care can be invasive or limited in application.
• The need for innovative, effective, and user-friendly disinfection technologies is critical.

Purpose of the Study:

• To develop and evaluate a wirelessly powered ultraviolet-C (UVC) radiation-based disinfecting bandage.
• To assess the efficacy of the UVC bandage in sterilizing and treating chronic wounds.
• To demonstrate a low-cost, battery-free, and flexible solution for wound management.

Main Methods:

• Embedded low-power UVC LEDs (265-285 nm) controlled by a microcontroller.
• Integrated inductive coil for 6.78 MHz wireless power transfer (WPT) with a rectifier circuit.
• Laboratory testing to evaluate microorganism inactivation efficacy against Gram-negative bacteria.

Main Results:

• Achieved maximum WPT efficiency of 83% in free space and 75% on the body.
• UVC LEDs emitted radiant power of 0.6 mW (with bandage) and 6.8 mW (without bandage).
• Demonstrated effective eradication of Gram-negative bacteria (Pseudoalteromonas sp. D41) on surfaces within six hours.

Conclusions:

• The wirelessly powered UVC disinfecting bandage is a viable, low-cost, and battery-free technology.
• The smart bandage system shows significant potential for treating persistent infections in chronic wound care.
• Its flexibility and ease of application make it suitable for direct mounting on the human body.