Patients with severe tracheal obstruction are often very dangerous and can easily cause life-threatening asphyxia. It is also difficult for physicians to deal with such patients, and there are high demands in terms of surgical difficulty, risk, and safety. This issue provides a brief analysis of last week’s case. (Detailed description of the condition can be viewed by clicking the “original article” at the bottom left of this article.) Wang Xiaoping, Department of Respiratory Medicine, Shandong Chest Hospital, was diagnosed with “adenocarcinoma of the lung” after a bronchoscopy at a local hospital, and was given symptomatic supportive treatment without radiotherapy. He was admitted to our hospital because the symptoms of chest tightness and breathlessness were gradually increasing. He had a history of smoking for more than 40 years. Tracheoscopic examination: the mucosa of the trachea was congested and infiltrated with hypertrophy about 8 cm below the sound gate, the right wall was externally compressed with tumor and infiltrated with hypertrophy, and the local lumen was narrowed by about 90%, which could be passed with force into the mirror, and the bulge was still sharp. The mucosa of the right main bronchus and the branches of the upper lobe was congested, infiltrated and hypertrophied, and the lumen was narrowed. Treatment: Because of the patient’s critical condition, the department discussed that relevant resuscitation treatment should be carried out immediately, and a metal peritracheal stent was implanted under local anesthesia and sedation. After the operation, the lumen was more open than before, and the tracheal stenosis was about 30%, and the patient’s breathlessness was significantly improved. Postoperative radiography showed that the stent was expandable and in good position.