Shaving area of unwanted hair before laser operation is useful in cosmetic procedure: A simulation study

Comparison among Intense Pulsed Light, Alexandrite, and Long-Pulsed Neodymium-Doped Yttrium Aluminum Garnet 1064 Nm Lasers for Lower Leg Hair Removal: Case Series

Lower leg hair removal is the method of reducing unwanted lower leg hair. Various technologies for lower leg hair removal include Intense Pulsed Light (IPL), alexandrite laser, and neodymium-doped yttrium aluminum garnet (Nd: YAG) laser. Conventional techniques are abandoned because effectiveness of the latest technological therapies has a longer period with minimal side effects. The comparison of successful treatment among IPL, alexandrite laser, and Nd: YAG laser for lower leg hair removal. Two patients, male and female, 28 years old, Fitzpatrick IV skin type. Three areas in the lower legs are marked for IPL 695 nm, fluence 15 J/cm2, pulse duration 60 ms; alexandrite 755 nm, fluence 3 J/cm2, pulse duration 2 ms, long-pulsed Nd: YAG 1064 nm, fluence 32 J/cm2, pulse duration 60 ms. IPL for 3 sessions at 2-week intervals. The alexandrite and Nd: YAG lasers for 3 sessions at 4-week intervals. Successful parameters with hair reduction and Visual Analog Scale (VAS) can be seen from photography and dermoscopy before and after therapy. In the first case, the most effective reduction terminal hair after IPL (95,1%), alexandrite (91,02%) and Nd: YAG (79,69%), respectively. In the second case, the most effective reduction of terminal hair after alexandrite (91,02%), Nd: YAG (79,69%), and IPL (20%), respectively. Hyperpigmentation and the highest VAS score (6-7) are found in the area treated with alexandrite lasers of two patients. Two patients have decreased Dermatology Life Quality Index scores. Nd: YAG laser may be better suitable for both sexes with minimal side effects. The limitation of this study is the smaller subject group and limited session.

Dose-dependent study of effects of 532-nm continuous wave laser on rat skin: A mechanistic insight

Visible lasers emitting in the green spectral region are being routinely employed in various medical and defense fields namely treatment of pigmented lesions, tattoo inks, port wine stains, dazzling the target or mob dispersal. Despite their increasing applications, lasers also tend to pose occupational hazards to operators, ancillary personnel, individuals undergoing laser therapies. This study was aimed at investigating the effects of different doses of 532-nm continuous wave laser on rat skin. The present study demonstrated that higher fluences of 532-nm continuous wave (CW) laser induces significant tissue damage through induction of tumor necrosis factor-α, cyclooxygenase-2, tumor protein (p53), PARP 1, caspase3 which in turn leads to tissue damage and cell death. Furthermore, level of heat shock proteins, pAkt were found up-regulated as a cope up response to laser-induced stress. On the basis of the findings, irradiation with 532-nm CW laser up to 2.5 J/cm² was found within the safe exposure limits. Thus, it is probably the first attempt to demonstrate the tissue damage induced by 532-nm CW laser on skin, which may help in choosing safe laser dose for certain skin-based applications and evolving methods to ameliorate laser-inflicted injuries.