To investigate the effects of blue light therapy on bacterial counts and cytokine levels in chronic wounds.
Approach:
Study Design: A clinical study comparing the effects of three fluences of blue light (20, 60, and 100 J/cm2) on chronic wounds, focusing on bacterial load and cytokine modulation.
Participants: Patients aged 18 and above with chronic wounds ≥ 6 weeks old were recruited from the Copenhagen Wound Healing Center.
Intervention: Continuous LED-based blue light at 405 nm was applied for 15 minutes per session, with temperature control to prevent overheating.
Key Findings:
Blue light therapy showed a dose-dependent reduction in bacterial load.
Cytokine levels were modulated by blue light exposure.
The highest dose of 100 J/cm2 was chosen to maximize bacterial inactivation while minimizing skin damage.
Interpretation:
Blue light therapy may effectively reduce bacterial load in chronic wounds while influencing cytokine levels.
Limitations:
Limited studies on the long-term effects of blue light therapy on chronic wounds.
Variability in individual responses to treatment may affect outcomes.
Conclusion:
Blue light therapy presents a promising approach for managing bacterial load in chronic wounds, warranting further investigation.
by Frederik Plum, Aqella Rasul, Ewa Anna Burian, Claus Henrik Nielsen, Khaled S. A. Ghathian, Magnus S. Ågren, Katrine E. Karmisholt, Klaus Kirketerp-Møller
