This 2007 paper confirms another study which was published in the same journal in 2003, titled Objective and Quantitative Improvement of Rosacea-Associated Erythema After Intense Pulsed Light Treatment. The 2003 paper had the bold conclusion “As demonstrated by truly objective and quantitative means, intense pulsed light is effective for reducing rosacea-associated blood flow, telangiectasia, and erythema.“. A doppler radar was used in the 2003 study, this 2007 study has used a spectrophotometer to further prove that IPL is particularly good for the red face and broken blood vessels of rosacea.
Objective Evaluation of the Effect of Intense Pulsed Light on Rosacea and Solar Lentigines by Spectrophotometric Analysis of Skin Color. Dermatol Surg. 2007 Apr;33(4):449-454, Kawana S, Ochiai H, Tachihara R.
BACKGROUND: To date, intense pulsed light (IPL) has been applied to various skin diseases, but there have been few objective evaluations of its efficacy.
OBJECTIVE: The aim of this study was to perform objective evaluations of the effect of the IPL system on rosacea and solar lentigines.
METHODS: Twelve patients with rosacea were treated with IPL at the wavelength of 550 to 670 nm, three times every 4 weeks, and the skin color was determined with L(*)a(*)b(*) color space using a spectrophotometer. In addition, 18 patients with solar lentigines were treated once, and the lightness L(*) was determined.
RESULTS: In all of 6 erythematotelangiectatic rosacea patients and in 5 of 6 papulopustular rosacea patients, each of the L(*)a(*)b(*) values of the posttreated lesions approached those of normal skin areas (efficacy rate, 91.6%). The mean level of the L(*)a(*)b(*) values improved significantly after treatment and particularly in the erythematotelangiectatic rosacea patients. In 12 of 18 patients with solar lentigines, the lightness L(*) was elevated after treatment (efficacy rate, 66.6%).
CONCLUSION: As demonstrated by spectrophotometric analysis of skin color, IPL at the wavelength of 550 to 670 nm is effective for rosacea and solar lentigines, particularly most useful for erythematotelangiectatic rosacea
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