EVLA—Endovenous Laser Ablation is a new method of treating varicose veins without surgery.  Instead of tying and removing the abnormal veins, they are heated by a laser.  The heat kills the walls of the veins and the body then naturally absorbs the dead tissue and the abnormal veins are destroyed.
During the 45-minutes procedure, Our special surgical fiber is inserted into the defective vein. This is usually performed under local anesthesia using ultrasound guidance.  The laser heats the lining within the vein, damaging it and causing it to shrink, and seal shut.  Once this happens, the closed vein can no longer carry blood, eliminating vein bulging by correcting the root of the problem.
The 1470nm laser energy is preferentially absorbed in the intracellular water of the vein wall and in the water content of blood. The irreversible photo-thermal process induced by the laser energy results in a complete occlusion of the treated vein. 

Laser therapy uses an intense, narrow beam of light to resect or destroy cancer and abnormal cells that can turn into cancer.  Tumor cells absorb light of different wavelengths than normal cells do.  So, tumor cells can be targeted by selecting the proper wavelength of the laser.
Laser therapy is most commonly used to treat tumors and precancerous lesions on the surface of the body or the lining of internal organs. For example, include basal cell skin cancer, non-small cell lung cancer, colorectal polyps , etc. Lasers may also be used to ease certain symptoms of advanced cancer, such as bleeding or blockages. For example, lasers can be used to destroy parts of a tumor that is blocking the windpipe, throat, colon, or stomach.
Image-guided ablation of tumors is assuming an increasingly important role in many oncology services as a minimally invasive alternative to conventional surgical interventions for patients who are not good candidates for surgery，such as certain tumors in the liver and brain.  Laser-induced interstitial thermal therapy (LITT) is a percutaneous tumor-ablation technique that utilizes high-power lasers placed interstitially in the tumor to deliver therapy.  Multiple laser fibers can be placed into the treatment volume and, unlike other interstitial heating techniques, can be fired simultaneously to rapidly treat large volumes of tissue.

Endovascular laser ablation of tumor is based on the thermal sensitivity of tumor tissue. Laser wavelengths of 810nm, 980nm and 1470nm are usually used to transmit laser heat to the internal blood vessels of tumor through surgical fiber for ablation. Guided by CT or X-ray C-arm, Seldinger method was used for percutaneous arterial puncture, short guide wire was used to insert the catheter sheath, and the catheter was selectively inserted into the tumor supplying artery for arteriography, so as to understand the distribution of the supplying artery and tumor vessels. The surgical fiber is inserted into the internal blood vessels of the tumor through the catheter, and the heat released by the laser is transmitted to the internal blood vessels of the tumor through the surgical fiber, so as to perform selective ablation of the lesion.
Endovascular laser ablation of tumor can accurately act on the minimally invasive treatment of tumors in various organs, such as lung cancer, liver cancer, etc. Although other ablation techniques can be used for focal tissue ablation, such as radiofrequency ablation, cryoablation and microwave ablation, laser ablation has higher precision and predictable tissue ablation volume due to its own characteristics and advantages, thus avoiding collateral damage

Laser wavelengths of 980nm, 1470nm and 2010nm can be highly absorbed by water molecules and hemoglobin in tissues. After absorbing laser energy, water molecules and hemoglobin are highly vaporized, resulting in cutting, hemostasis and coagulation effects. Laser cutting of soft tissue not only ensures the accuracy and safety of cutting, but also can cut tissue quickly. The heat coagulate layer (scab layer) left after lung tissue cutting is very thin, which ensures the hemostasis and tightness, but does not deeply damage the tissue, which is conducive to tissue healing. Laser resection of pulmonary nodules has the following advantages: (1) Less air leakage, less damage to surrounding tissues, and thin coagulation necrosis layer; (2) Lung protection compliance; (3) Good hemostatic effect; (4) not easy to damage bronchi and large blood vessels.
The principle of pulmonary nodule resection is that the distance from the edge of resection to the nodule is not less than 2 cm. Laser therapy can be used in thoracoscopic and open surgery. The laser surgical fiber specially developed by us can be used to transfer energy to the target tissue, so as to achieve the purpose of pulmonary nodule resection.