The initial laser technology is mainly used to treat various diseases. The theoretical basis of laser treatment of diseases is that it causes heat, light pressure, electromagnetic field and biological stimulation after acting on biological tissues to achieve the purpose of treating diseases. With the continuous improvement of laser technology, laser medical treatment began to develop to multiple diseases. This paper will briefly introduce several diseases treated by laser.
1、 Laser treatment of pigmented nevus
Pigmented nevus grows on the face or exposed parts of the body. Considering beauty and preventing its malignant transformation, it should be removed by laser. At present, CO2 laser vaporization is usually used. Laser vaporization should be based on the complete removal of pigment. Generally, it should be vaporized to the shallow layer of dermis. In special cases, it should be vaporized to the middle layer of dermis. If it exceeds this depth, scars will be left after wound healing.
Laser treatment of pigmented nevus may occur:
Pigment residue is mainly caused by the residue of nevus cells. It can be caused by unskilled operation and inappropriate laser spot. Generally, it can be removed by the second laser treatment;
The scar is caused by too deep laser vaporization. Generally, if there is no improvement after three months, it can be repaired by laser method;
Wound infection can be applied with anti infective ointment. However, it should be noted that patients with scar constitution should not use laser vaporization to remove pigmented nevus.
2、 Laser treatment of various hemangiomas
Hemangioma hemangioma can be divided into fresh erythema nevus, simple hemangioma, cavernous hemangioma, mixed hemangioma, hemangiopericytoma, senile hemangioma, glomus tumor and other types of hemangioma.
Ar + laser, CO2 laser and Nd: YAG laser are often used in the laser treatment of hemangioma. Ar + laser is easy to be absorbed by hemoglobin and can selectively destroy pigmented skin damage. Therefore, it can produce thermosetting effect in the dermis and close the dilated capillaries in the depth range of about 1mm on the superficial surface of the dermis, which is replaced by a diffuse collagen deposit; The mechanism of Nd: YAG laser is similar to that of Ar + laser, but the thermal effect of Nd: YAG laser on the surface of tissue is small, and the temperature rise in the deep part of tissue is large. Therefore, Ar + laser is often used in superficial hemangioma, while Nd: YAG laser is used in deep hemangioma; CO2 laser is one of the lasers with the highest continuous output power among gas lasers. The output power of CO2 laser can range from tens of watts to several kilowatts. It has good thermal effect, good vascular sealing and remarkable hemostatic effect. It is widely used in the treatment of various hemangiomas.
3、 Laser treatment of exogenous skin pigmented diseases
Exogenous skin pigmented diseases refer to patients who actively or passively prick and process a certain part with color, but the effect is not satisfactory and want to recover. They are common in the easily exposed parts of the face and limbs. Including tattoo, eyebrow washing, Eyeliner washing, lip liner washing, tattoo washing, etc.
The traditional methods of cauterization, corrosion, skin grinding or surgical resection often leave scars. Laser treatment can achieve satisfactory results. Due to the different colors of pigmented diseases, specific treatment schemes should be adopted, such as 532mm wavelength for red disease areas and 1064mm wavelength for black disease areas.
The effect of laser treatment of diseases is significantly better than the traditional treatment methods, because it has the characteristics of strong directivity, high brightness, good monochromaticity and good coherence. Therefore, laser technology has been applied in the field of medical beauty since the 1990s.