Abstract:Objective To explore the value of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in the diagnosis of thoracic diseases. Methods 110 patients who underwent EBUS-TBNA examination in our hospital from March 2016 to March 2019 were selected. All patients were hospitalized because of chest discomfort or physical examination. The clinical data of the patients were retrospectively analyzed. All patients were screened by CT or PET-CT before EBUS-TBNA examination. Based on the results of percutaneous lung biopsy, thoracoscopic surgery and thoracotomy, the value of EBUS-TBNA in the diagnosis of thoracic diseases was analyzed, and the corresponding sensitivity, specificity, accuracy, positive predictive value and negative predictive value were calculated. The consistency between EBUS-TBNA and pathological diagnosis was analyzed by Kappa test, and the Kappa test value was defined. Results Preliminary screening by CT or PET-CT showed that 81 cases (73.64%) were suspected of malignant tumors in the chest and 29 cases (26.36%) were suspected of tuberculosis. Surgical and pathological diagnosis showed that 75 (92.59%) of 81 suspected cases of malignant tumors in the chest were diagnosed as malignant tumors. Of 29 suspected tuberculosis patients, 22 (75.86%) were diagnosed as tuberculosis. The Kappa value of the consistency test between EBUS-TBNA diagnosis and pathological diagnosis of chest malignant tumor was 0.749 (95% CI: 0.711, 0.904). The Kappa value of the consistency test between EBUS-TBNA diagnosis and pathological diagnosis of tuberculosis was 0.731 (95% CI: 0.703, 0.917). The Kappa value of the consistency test between EBUS-TBNA diagnosis and pathological diagnosis of mediastinal lymph node metastasis was 0.604 (95% CI: 0.697, 0.825). Of the 110 patients examined, 2 (1.82%) had mild discomfort, but the patients were all tolerant to the test. Conclusions EBUS-TBNA is of high value in the diagnosis of malignant tumors of the chest, tuberculosis and mediastinal lymph node metastases, with high consistency with the surgical pathological diagnosis and ideal safety.