Objective      To investigate the clinical effect of light-emitting diode (LED) red light and blue light combined irradiation on healing chronic traumatic wounds.       Methods      With a random stratification method based on the wound types

the 36 patients with chronic traumatic wounds admitted in Daping Hospital from June 2014 to November 2015 were divided into the control group (n=18) receiving red light therapy

and the experimental group (n=18) receiving red light and blue light combined therapy. Wounds in both groups were treated with unified disposal options except LED irradiation

and the therapy lasted for 10 d as a course. The pain scores

wound areas and temperatures before and after irradiation were measured on the 1st

3rd

5th

7th and 10th days. The wound contraction ratio and wound relative healing rate were calculated. The local or systemic adverse reactions were observed.       Results      After irradiation for 1 course

the wound areas and pain scores of both groups significantly decreased and presented a significant time effect (P0.05). Moreover

no local and systemic adverse reactions were observed in all cases. Compared with the control group

the red light and blue light combined irradiation significantly improved the wound contraction ratio (P0.001)

wound relative heating rate (P=0.006)

and wound healing efficacy (P=0.01)

and effectively relieved the pain of wounds (P=0.008).       Conclusion      Compared with the red light irradiation

the red light and blue light combined irradiation is more effective in assisting the healing and relieving the pain of chronic traumatic wounds

and 10-day irradiation therapy is safe.