Laser for the treatment of skin hemangiomas 532nm frequency doubling of Nd: Y AG (neodymium-doped yttrium aluminum garnet) laser, pulsed dye laser, 064 nm Nd: YAG laser, photodynamic therapy, as well as intense pulsed light systems, etc.. Laser treatment of vascular tumor target chromophore in the blood oxygenation of hemoglobin, oxyhemoglobin absorption of light energy to produce heat, heat conduction to the surrounding vessel wall, resulting in vascular damage. The oxyhemoglobin There are three absorption peaks: 418 nm, 542 nm, 577 nm. 418 nm absorption peak in the wavelength of the laser penetration is poor, it is difficult to reach the blood vessels of the dermis, while epidermal melanocytes particles it has a strong absorption, likely to cause the damage of the epidermis. Of course, the customer will consider the life time of green laser pointer as the most important factor when they buy the laser pointer.
Therefore, the clinical use of laser treatment of hemangioma is usually close to the two absorption peaks (542 nm and 577 nm) [11]. Hemangiomas and vascular malformations in the diagnosis and classification. Reasonable classification and correct diagnosis is the basis of access to good effect. In China, the basic follow the Virehow classification divided into hemangioma capillary hemangioma, cavernous hemangioma, racemose hemangioma and mixed hemangioma [12]. 1988, Mul ? iken [13] proposed a biological classification method, based on history, clinical manifestations and biological properties of vascular endothelial cells, in the traditional sense of the hemangioma is divided into hemangiomas and vascular malformations two categories. 1995 Warier and Suen, the combination of clinical work and a large number of clinical and pathological study to improve of the Mullike lowack classification [14]. The manufacturer should meet the need of the customer towards laser pointer .
Vascular malformations are divided into: the veins, veins, capillaries, lymphatic tubes, arteriovenous, and mixed malformations, the the Muilike classification of PWS is classified as capillary micro-arteriovenous malformations, arteriovenous malformations into capillary malformations types. In addition, in some special anatomic sites of vascular tumor may compress the surrounding organs, or even cause death, it is also need of early intervention [15]. Therefore, the choice of timing of treatment principle should be: early detection and early treatment. That is, when a hemangioma was found should be immediately treated [16]. Laser application in the children’s skin and blood vessels lame. The pulsed dye laser (PDL) left Asian Gang [17] using 585 nm, the PDL treatment of PWS, eight times after treatment, the total effective rate of 84% [18]. The manufacturer will definitely try the best to enhance the laser technology of green laser .
More recently, a 595 hill and the 600 nm PDL, spot reached 10-12 mm, the pulse width to achieve 1.5-40 ms, can be used for hemangioma of the deep dermis and the treatment of facial telangiectasia [19]. Mariwalla [20] application of wavelength 595 nm, pulse width 1.5 ms, the energy of 11-12 J/cm2, and dynamic cooling device, the following treatment of l-year-old children with port wine stains, proof of 595 nm, the PDL than ever 585 nm, the PDL has a higher cure rate [21]. Yangchun Jun [22] with 76 cases of 595 nm, variable pulse dye laser treatment of cutaneous hemangioma, port wine stains and hemangiomas in efficacy, efficiency of 83.2% and 86.67%. The producer will try the best to prolong the life time of green laser pointer .
KTP laser is a dual-band yttrium aluminum garnet laser, capable of firing a wavelength of 532 nm green, 532 nm, very close to the absorption peak of hemoglobin, making it ideal for the treatment of superficial hemangioma. The great variable pulse width from 1 ~ 100 ms, to meet the long pulse width needs to be able to slowly heated blood vessels without vessel wall rupture. Recently, a comparative study [23], a group of KTP laser spot size of 10 mm, another group of PDL to treat facial telangiectasia and facial diffuse erythema. The results showed that most subjects KTP group treatment was significantly better than PDL group. The supplier of green laser pointer should meet the increasing needs of the customer.