Current and Future Directions in Fluorescence Imaging-Guided Debridement

Area of Science:

• Wound healing
• Medical imaging
• Microbiology

Background:

• Sterility and bioburden reduction are critical for chronic wound healing, particularly in diabetic foot ulcers.
• Current bioburden assessment methods are often costly, slow, or reliant on subjective clinical evaluation.
• High bacterial loads in wounds can be asymptomatic and difficult to detect clinically.

Purpose of the Study:

• To introduce and evaluate Autofluorescence (AF) imaging as a novel technology for identifying and quantifying bacterial load in chronic wounds.
• To highlight the limitations of existing handheld AF imaging devices.
• To present a new wearable AF imaging device designed for intraoperative use.

Main Methods:

• Utilizing violet light to induce fluorescence in bacterial fluorophores present in chronic wounds.
• Employing AF imaging to visualize and quantify bacterial burdens.
• Comparing a new glasses-mounted AF imaging device (REVEAL) with existing handheld systems.

Main Results:

• Eighty-seven percent of common chronic wound bacteria exhibit fluorescence (red or cyan) under violet light.
• AF imaging aids in guiding wound dressing changes and debridement by locating bacterial burdens.
• The REVEAL device offers advantages by not requiring specific lighting conditions and enabling real-time intraoperative use.

Conclusions:

• Autofluorescence imaging is an effective tool for bacterial detection and quantification in chronic wounds.
• Wearable AF imaging devices like REVEAL enhance clinical utility during surgical procedures.
• AF imaging-guided treatment represents a significant advancement in managing chronic wound bioburden.