All subjects were observed by the physician who was masked to the study， about air leak stop time, chest tube removal time, discharge time, outpatient chest X-ray, pulmonary function tests as necessary. cases if persistent air leak more than seven days, the attending physician determines whether pleurodesis again or surgery or other medical treatment. Finally, the researcher who do not know groups will collection data by "air leak case record form" including diagnosis, surgical site，the start and end time of the surgery, the use of antibiotics, discomfort problems (pain , stomach discomfort, cough, fever> 38 ℃, allergic reactions and respiratory discomfort), postoperative air leak time, air leak stop time , chest tube removal time, discharge time, the data will be use SPSS20.0 version of the statistical software package, and T-test, pair T-test ，Anova ,linear correlation statistical methods for analysis.