Dual-Mode Electrical Stimulation Dressing for Promoting Healing of Acute Wounds.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Technologies

Background:

• Acute wounds pose a global health challenge, with traditional dressings offering limited active healing capabilities.
• Electrical stimulation (ES) shows potential for wound healing by influencing cell migration and angiogenesis.
• Current ES dressings lack adaptability to the dynamic microenvironments of healing wounds.

Purpose of the Study:

• To develop an adaptive, dual-mode electrical stimulation (ES) dressing for enhanced wound healing.
• To create a dressing that responds to changing wound conditions, optimizing therapeutic output.
• To investigate the efficacy of a novel TENG- and Ag/Zn battery-integrated dressing in accelerating wound closure.

Main Methods:

• A dual-mode ES dressing was fabricated by integrating a triboelectric nanogenerator (TENG) and an Ag/Zn battery onto a nonwoven fabric.
• The dressing was designed to deliver direct current (DC) stimulation via the Ag/Zn battery in early, exudate-rich wound stages.
• In later, drier stages, the TENG generates pulsed electrical stimulation in response to mechanical energy.
• The dressing's performance was evaluated in rat wound models.

Main Results:

• The dual-mode ES dressing demonstrated significantly enhanced wound healing in rat models.
• Achieved 89.7% wound closure by day 10, surpassing single-mode control dressings.
• The adaptive stimulation modes showed synergistic effects, promoting faster and more complete healing.

Conclusions:

• The developed dual-mode ES dressing effectively adapts to dynamic wound environments, providing optimized electrical stimulation.
• This adaptive technology represents a significant advancement over single-mode ES dressings for acute wound management.
• The findings highlight the potential of smart wound dressings for improving healing outcomes.