Tracheoscopy to detect tuberculosis time is related to the test program, usually half a day to a day, there may be two to three days, etc.. For some people with tuberculosis can be diagnosed through bronchoscopy, through the examination can find the typical changes of tuberculosis, such as the discovery of caseous necrotic lesions, can also be accompanied by localized bronchial stenosis, which can be initially judged may have tuberculosis. If it is necessary to brush the local airway suspicious lesions for antacid staining, the results can be obtained in half a day to one day; if it is necessary to perform alveolar lavage on the local lung segments and check the DNA determination of Mycobacterium tuberculosis, it usually takes one to two days. Together with the corresponding necrotic lesions for pathologic biopsy, it usually takes two to three days. Note that it is important to keep a steady mind during bronchoscopy for tuberculosis.