1w Style

LED therapy for acne

Light-emitting diode (LED) has been used widely for acne treatment and skin rejuvenation in recent years. The LED therapy involves the mechanism of photomodulation without downtime, leading to safe and painless therapy. In our latest study of acne treatment, we used a new LED system in which, unlike conventional LED, pure light alone is emitted and multiwavelength irradiation can be obtained. We report the results of efficacy and safety evaluation of the new system.

Subjects: Twenty subjects (4 men and 16 women) aged 20 to 35 years with acne at grades 4 to 10 according to the Leeds Grading System.

Method: Device: LED Therapy manufactured by Futek Inc.

Features: A conventional LED is mounted with a diffusion lens on its irradiation side to increase the LED luminance and complement the wide angle of the light, which, as a result, reduces the light intensity by about 20%. To cover these shortcomings, more than one high intensity chips were implanted, instead of a diffusion lens, in the device we used, allowing us to control all wavelengths. (1) Light wavelengths: Five different wavelengths of 460 nm, 575 nm, 644 nm, 870 nm, and 940 nm. (2) Total number of LED elements: 3480. (3) Total number of LED light power: 3656 mW. (Light output does not include thermal energy.) In acne patients, after facial cleansing for 15 minutes, blue and red lights were irradiated concurrently twice a week at a distance of less than 10 cm from the face. The satisfaction level of the patients was evaluated after 10 procedures with the use of a 5-grade scale for satisfaction level and was reevaluated with the use of the Leeds Grading System.

Results: (1) The patients felt improvement after receiving an average of 5 procedures. Those with inflammatory acne and acne scar showed better improvement. Those with oily skin also showed improvement in their skin. The therapy also made it easier to remove white comedos. (2) The reevaluation using the Leeds Grading System after 10 procedures showed improvement of 3 grades or more in all the patients. It is necessary for subjects to achieve grade 6 or more, however, to continue the therapy. Of them, 80% showed improvement after receiving 20 procedures to grades 1 to 3.

Conclusion: The therapy using the new LED system quickly improved serious inflammatory acne and acne scars, indicating a high efficacy of the therapy.

Author disclosure: Nothing disclosed at press time. Commercial support: None.

Poster Discussion Session P3316, American Academy of Dermatology, 64th Annual Meeting, March 3-7 2006, San Francisco.

Supplement to Journal of The American Academy of Dermatology, March 2006, Volume 54, Number 3.