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Development of professional laser tattoo removal?

Raid first used Q-switched ruby laser in 1983, mainly for blue black and some non professional tattoos. Tattoos of different colors need to be removed with different lasers. No laser can remove all colors.

Laser treatment tattoos mostly choose the treatment wavelength according to the wavelength complementarity. It is suggested to choose a laser treatment according to the main color of the tattoo to see the effect. Please see the dermatology department or laser Department of the medical unit with corresponding laser equipment. After the treatment site is sealed with 5% / EMLA anesthetic ointment for 40-50 min, remove the anesthetic, disinfect with 0.5% iodophor, clean with normal saline, and irradiate the tattoo area vertically with laser beam after the skin is dry. The patients were treated with ice pack for 10 minutes immediately after operation, with an interval of 2-3 months and followed up for 6 months.

The parameter setting is set according to the patient’s age, skin lesion location, color depth and reaction after laser irradiation, resulting in immediate yellowish white change of the skin, followed by mild edema, no or mild bleeding.

Applications of various lasers: a certain energy density is 2.0-5.5j/cm2, and the spot size is 3-4mm2.

  1. Q-switched Nd: YAG laser treatment. The laser wavelength is 1064mm and the pulse width is 10ns. It mainly treats black, blue black and blue tattoos.
  2. Q-switch qs532 laser therapy. The laser wavelength is 532nm and the pulse width is 5nm. It mainly treats red, yellow and brown tattoos.
  3. Q-switch qs755 laser therapy, with laser wavelength of 755nm and pulse width of 75Nm, mainly for tattoo therapy such as green, blue, brown and black.

Laser selection of various tattoo colors:

Black, grayish black and blue melanin can be treated with Q-switched Nd: yag1064nm laser;

Blue black, brown, green and coffee can be treated with Q-switched Alexandrite 755nm laser;

The red tattoo pigment can be removed by Q-switched frequency doubled Nd: YAG532nm laser, but the removal is relatively slow.

The laser removes the pigment by selecting the laser wavelength according to the tattoo color through the principle of selective photothermolysis and color complementarity. In other words, the tattoo pigment particles in the skin absorb the instantaneous high energy of the laser under the irradiation of Q-switch laser, so that the pigment particles vaporize and break, and the cell framework can be completely retained.

At the same time, because the laser pulse time is shorter than the thermal relaxation time of skin tissue, the process of instantaneous single pulse laser energy release is completed in about one millionth of a second, so that the newly generated heat will not be transmitted to the surrounding tissue and epidermis. While the focus tissue is eliminated by thermal action, the surrounding healthy skin tissue will not be damaged. In the subsequent inflammatory reaction, part of the granular debris directly enters the lymphatic capillaries and is filtered and eliminated, and part is swallowed by macrophages and discharged by acid hydrolase degradation. The cells with pigment granules removed can be repaired quickly on the basis of a more complete cell framework. The longer the wavelength, the deeper the tissue depth under the action of the laser, and the color particles of the tattoo are in the dermis. Therefore, the longer the wavelength has a great impact on the melanin of these dermal tissues, but little impact on the epidermis.

If it is not a traumatic tattoo and the pigment used has no red component, most tattoos can be completely removed without leaving traces. Generally speaking, the more metal ions in the pigment, the more treatment times are required. Clinically, it is common to see that after two or three times of tattoo treatment, most of the thick black has been removed, but the red pigment is left. This is mainly because it is difficult to remove the iron and chromium plasma in the pigment.

During laser treatment, we should pay attention to the standard and prevent excessive irradiation. It is appropriate to have gray white and spot blood seepage immediately after laser irradiation. After playing, play again at an interval of two to three months. Be sure to interval. From the pathological section, the pigment is just concentrated together after two to three months, showing a linear distribution, and the playing effect is good. The principle of laser is to break the pigment and then be swallowed by phagocytes or absorbed by other ways. For really treated patients, pigment can be seen from the section, but it is too small to be seen by the naked eye. Many people worry about sequelae.

In fact, it is carried out by professional doctors, and there is little possibility of problems. Generally speaking, it is easy to have the problem of pigment darkening or pigment whitening, so the safer way is to carry out experimental treatment. First hit a few points with different energy. After a few weeks, observe to see which energy is most suitable for treatment. Postoperative care such as sunscreen should be paid attention to, which can prevent adverse reactions to the greatest extent. Postoperative nursing of laser therapy should pay attention to:

The wound surface shall be coated with baiduobang ointment to keep the wound dry and clean. Generally, it is not bandaged. If the wound surface is large or not easy to be exposed, it can be properly bandaged. At the same time, oral antibiotics such as Lijunsha and xianxianfeng mycin shall be given to avoid sun exposure and strenuous exercise. Cosmetics shall be prohibited to avoid pigmentation of the wound surface.

The disadvantage of laser is that it is expensive and time-consuming. However, the patients suffer little pain and injury, and female patients are especially inclined to laser treatment. Generally, tattoos can be treated with laser for about 3 times. Depending on the size and cost, it’s more expensive than tattoos.

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