The results of the corresponding examination of sputum are generally categorized into three cases, and the time required is not exactly the same. First, sputum check for tuberculosis antacid bacillus staining, the result is usually sent in the morning, and the report can be issued in the afternoon, and it needs 3 consecutive days of continuous checking in order to strive for a positive sputum test rate. Secondly, sputum check for bacterial culture, the bacterial culture result is usually issued after 3 days, and the official result is issued as a text report after 7 days, which is mainly for guiding the clinician’s clinical medication. Thirdly, sputum examination of exfoliated cells belongs to oncology examination, which is used for early detection of lung tumor whether there is cytological discharge mixed in sputum, and the result usually takes 3 days to go out to report. If the sputum check tumor cells are positive, if necessary, also need to send cellular immunohistochemistry examination, the examination again need more than 3 days, the cost of about 900 yuan, so sputum test results in the total time of 1-7 days time, mainly due to the different contents of the examination.