Ultrasound bronchoscopy (EBUS) is a device with an ultrasound probe mounted on the front end of the bronchoscope, combined with a special suction biopsy needle that allows real-time ultrasound-guided transbronchial needle aspiration biopsy (TBNA), color energy Doppler with electron convex array scanning on board, and also helps to confirm the location of blood vessels and prevent accidental vessel penetration.The main EBUS-TBNA indications are lymph node staging in patients with lung cancer, diagnosis of intrapulmonary tumors, diagnosis of unexplained hilar and/or mediastinal lymph node enlargement, and diagnosis of mediastinal tumors. EBUS-TBNA can also determine the degree of tracheal involvement, and has been shown to be effective in identifying tracheal wall involvement or tumor compression compared to CT, with specificity, sensitivity, and accuracy of 100%, 89%, 94%, and 28%, 75%, 51%, respectively. EBUS-TBNA also drains enlarged and necrotic lymph nodes in the mediastinum and hilum, thereby reducing fever and other toxic symptoms and airway compression and relieving dyspnea.