Indications: 1, radical resection of benign tumors in the airway 2, lung atelectasis of malignant tumors in the airway, regrowth of tumors in the stent Su Zhiyong, Department of Cardiothoracic Surgery, Affiliated Hospital of Chifeng College 3, tracheal foreign body, tracheal stenosis, carcinoid, granuloma, amyloid 4, mediastinal tumors encroaching on the trachea, 5, chronic inflammation of airway or tuberculous proliferative lesions 6, hemostasis of bleeding of the mucosa of the airway for the purpose of alleviating local inflammatory reaction 7, Removal of friable and difficult to clamp foreign objects in the bronchial tube of the airway: such as pills, teeth, chicken bones, mucus embolus, necrotic tissue or necrotic material, purulent material. 8, Tracheobronchial chondrodysplasia, lipoma, polyp, smooth muscle tumor, and other diseases better surgical treatment. Advantages: (1) very high safety, compared with laser and electrocoagulation, low cost, easy to protect, not easy to occur perforation of the tube wall and intraluminal combustion, will not damage the airway cartilage, no damage to the stent, the risk of airway perforation is minimized; (2) the patient does not have any discomfort during the treatment, due to the absence of high-frequency electrical effects can also be used for patients with pacemakers; (3) the proliferation of granulation tissue is minimized after the treatment, there is no risk of postoperative airway obstruction; (4) the treatment cost is low, minimally invasive, minimally invasive, smooth muscle tumor. (4) Low cost, minimally invasive, can be performed under local anesthesia, well tolerated by the patient (5) with a flexible soft lens for the treatment of 3-4 level or even more distal lesions The operation is simple and easy to carry out, the metal end of the probe is placed on the lesion as far as possible or deep inside the lesion can be repeatedly frozen and thawed with remarkable efficacy, short-term relief of clinical symptoms. Below are pictures of the treatment: