A comparison of Q-switched and long-pulsed alexandrite laser for the treatment of freckles and lentigines in oriental patients

Autor:	Henry H Chan, Chi K Yeung, Npy Chan, Stephanie G Y Ho, Syn Shek
Rok vydání:	2011
Předmět:	medicine.medical_specialty Erythema business.industry Dermatology Lower risk Patient satisfaction Edema medicine Surgery medicine.symptom Adverse effect Prospective cohort study business Alexandrite laser Postinflammatory hyperpigmentation
Zdroj:	Lasers in Surgery and Medicine. 43:108-113
ISSN:	0196-8092
DOI:	10.1002/lsm.21045
Popis:	Background Q-switched (QS) lasers are effective in the treatment of freckles and lentigines in Type I and II skin, with minimal adverse effects. Long pulsed (LP) lasers have been proposed to be more suitable for treatment of darker skin types. Objectives To investigate the efficacy and adverse effects of using QS or LP Alexandrite laser for the treatment of freckles and lentigines in Oriental patients. Methods A prospective split-face study of 20 Chinese patients who were randomly assigned to undergo a single QS (50 nanosecond) or LP (100 microseconds) laser treatment to either side of their face was carried out. Two blinded physicians assessed clinical efficacy using visual analogue scales of pre- and post-treatment photographs. Subjective assessment was evaluated using questionnaires which detailed the degree of pain, erythema and edema sustained during treatment, and improvement and satisfaction levels at 4, 8, and 12 weeks. Results There was statistically significant improvement in pigmentation (P
Databáze:	OpenAIRE
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