Thoracoscopic-assisted local tumor resection combined with pleural thermal cautery for malignant pleural effusion in lung cancer Thoracoscopic-assisted local tumor resection combined with pleural thermal cautery for malignant pleural effusion in lung cancer can minimize the tumor load and have definite efficacy in controlling pleural effusion and improving patients’ life quality. Malignant pleural effusion is characterized by rapid growth and recurrence, often accompanied by cough, sputum, hemoptysis, fever, dyspnea, chest pain and other symptoms, which can seriously affect the patient’s respiratory and circulatory functions and is a great consumption to the organism, causing the patient to enter the state of cachexia soon, which seriously affects the patient’s survival quality survival. The traditional treatment method is mainly drug perfusion treatment after chest drainage, which has achieved good recent efficacy, but are palliative treatment, with poor long-term efficacy. In contrast, total pleuropneumonectomy was once considered an aggressive radical procedure with a few long-term survivors, but it is more invasive and has gradually been abandoned by surgery. Thoracoscopic-assisted surgical treatment not only allows for minimally invasive resection of the cancer and reduction of tumor load, but also allows for complete removal of fluid and reopening of the compressed lobe, as well as physical or chemical pleural fixation to close the pleural cavity and avoid recurrence of pleural fluid. Through the comparison of treatment effects, we have the following experiences 1. Electrodebrider is a device routinely used by surgeons at present, which can better control the degree and scope of cauterizing tumor nodules and is simple and easy to perform. Since tumor tissues are more sensitive to high temperature than normal tissues, the heat generated by the electric knife when cauterizing tumor tissues is transmitted to the surrounding normal tissues, which increases the temperature accordingly and is not conducive to the growth of residual cancer cells in surrounding tissues. 2.Thoracoscopic assistance can eliminate the dead angle of field of vision in conventional open-heart surgery and ensure the complete electric cautery of the full range of flesh metastatic nodes. 3.The conventional surgery to peel off the pleura often causes bleeding from the trauma surface, and the bleeding volume and trauma are also larger due to the large peeling surface. On the contrary, electrocautery of metastatic tumor tissue only causes degeneration and necrosis of tumor tissue and occlusion of blood vessels, which causes less damage to the surrounding normal tissues, so there is less trauma and less bleeding. 4. Cauterization of the pleura of the dirty wall layer during surgery causes inflammatory reaction of the pleura, which is conducive to postoperative pleural cavity adhesion and achieves the purpose of pleural fixation. In conclusion, surgery for pleural metastasis of lung cancer is palliative treatment, and extended resection does not bring radical treatment effect to patients. Therefore, in patients with non-small cell peripheral lung cancer with malignant pleural effusion, if there is no distant organ metastasis, comprehensive treatment such as local excision of the primary foci with the assistance of thoracoscopy and electrocautery of the pleural metastatic nodes can not only have good effect on controlling pleural fluid, but also can minimize the patient’s tumor load with minimal trauma, significantly improve the patient’s survival quality and prolong the patient’s survival. It is worthy of clinical promotion and application.