Introduction to the LED application in dermatology

Light is used to treat human diseases is a very old method, as early as in thousands of years ago when I was in China and other countries use the sun to cure disease. And LED as a new type of light source, with its biological effect gradually known by people, is gradually applied in medicine and play an active role in this article the application of LED in dermatology are explained and described in detail.

a, LED the biological effect of

LED optical parameters of biological effect depends on the different optical parameters, including different wavelength, flow rate, intensity, irradiation time, continuous wave and pulse wave, and in the clinical treatment of number, interval, etc. Different wavelengths can reach different locations of the skin tissue ( As shown in figure 1) 。 In general, the more the longer wavelength penetration, skin tissue penetration at 400 nm distance is less than 1 mm, the distance from the 514 - nm through 0. 5 mm ~ 2 mm, 630 nm penetration distance of about 1 mm to 6 mm. At the same time, different wavelengths of light can be absorbed by different base in the organizations. In red (clinical 630 ~ 700 nm) Is often used in the treatment of skin tissue structure of the deep, for example the sebaceous glands; Blue light in the dynamics of light therapy used to treat the skin lesion; If think of skin's dermis requires longer wavelengths, such as the wavelength of 660 nm can reach the reticular layer of the dermis and dermal skin fibroblasts play a role in the, and this is one of the LED light source for the principle of photon tender skin.

2, LED applications in dermatology medicine

1. Photon tender skin, 照片复兴)

technology of photon tender skin is defined as the use of continuous intense pulsed light not stripped way under the low energy density of tender skin treatment. Since 2000 in just a few years, technology of photon tender skin rapidly spread across the country, is widely used in various large and medium-sized cities, has become one of the main means of improving skin photoaging, this technology can significantly improve the skin wrinkles, rough texture, irregular pigmentation and pore bulky wait for a phenomenon, has received numerous technical professionals and beauty of the appeal. Histologic change characteristic of skin photoaging is elastic fibrous degeneration and collagen fibers in dermis matrix mature obstacle, which leads to sagging skin and wrinkles.

the study found that the visible and near infrared LED light penetrates the skin epidermis to the dermis, through the thermal and light chemistry, prompted the elastic fibers and collagen regeneration and rearrange, so as to reduce the effect of skin wrinkles, increase elasticity.

　　2. Prevention or treatment of inflammatory skin pigmentation

inflammation after a pigmentation of the skin in the chemical and physical beauty is a common phenomenon, it is difficult to avoid, especially easy to appear in the Asian population. For example in clinic in order to alleviate the degree of skin pigmentation after laser treatment, generally avoid the ultraviolet ray too strong season, told the patient to avoid sun exposure and sunscreen, but inflammation after pigmentation is hard to avoid completely. In recent years, studies have found that the 660 nm LED light can prevent and even treat the skin pigmentation after inflammation, this will be the skin beauty a new research hotspot.

　　3. Promote the healing of wounds

visible to near infrared band LED light can promote the growth of epithelial cells after trauma, promote wound healing. At the same time for the healing of chronic ulcers of diabetic lower extremity also has a good therapeutic effect.

　　4. Reduce inflammation

has a series of studies have shown that the LED have anti-inflammatory effects. The study found that the 635 nm LED light can inhibit the gingival fibroblasts release of inflammatory medium - — The prostate gland ring element E2 ( PGE2) To alleviate the gum inflammation. In front of the pulsed dye laser treatment of skin photoaging if using LED light source irradiation in advance, can relieve the skin erythema, swelling and pain caused by the dye laser, etc. In breast cancer patients before radiotherapy using LED light source irradiation in advance can reduce the side effect of radiotherapy.

　　5. Prevention of scar

keloid is beauty and clinical treatment of difficult a skin disease, is caused by excessive connective tissue hyperplasia after skin damage. Patients often have scar constitution. In clinic for small and hard red papules, increases slowly, round, oval or irregular sexual scar, higher leather, spread outward keloid shaped, skin smooth, shiny, may be accompanied by pain, itching and discomfort. Clinical treatment of difficult, curative effect is not ideal. Studies have found that the LED can obviously improve the patient's pain, itching, discomfort, such as make the scar flat and at the same time have the advantage of noninvasive.

　　6. Other role

in addition, LED also can be used as a kind of no ultraviolet phototherapy instrument, the treated with light therapy, hair loss, relieve skin damage after ultraviolet irradiation and so on.

all in all, as a new type of light source, LED has been gradually applied to the skin medicine, with the constant innovation for LED lamps and for LED research the mechanism of biological effect on medicine, LED to the skin will have significant potential medical application prospect. LED has high security at the same time, the medical equipment can be used as a family. The bang

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