Research of Endobronchial Optical Coherence Tomography in Pre-COPD
Trial Parameters
Brief Summary
The pre-stage of Chronic Obstructive Pulmonary Disease (Pre-COPD) is challenging to diagnose. However, identifying Pre-COPD is a crucial step in the prevention and management of COPD. Endobronchial optical coherence tomography showed the value of diagnosis in Pre-COPD and COPD in previous researchs.
Eligibility Criteria
Inclusion Criteria: * non-smoking with normal lung function, no other pulmonary diseases besides pulmonary nodule as indicated by chest computed tomography (CT). Exclusion Criteria: * (1) patients with contraindication of bronchoscopy, (2) patients who are participating in other clinical studies, (3) patients with poor compliance who are believed by the researchers to be unable to cooperate for the completion of the examination and follow-up, and (4) women who were pregnant.