[Advantages and disadvantages of preoperative artificial pneumothorax for medical thoracoscopy]

Objective: To expolre the indications, safety, advantages and disadvantages of performing artificial pneumothorax prior to medical thoracoscopy. Methods: Data of 152 patients undergoing medical thoracoscopy for pleural diseases in the Beijing Tiantan Hospital Affiliated to Capital Medical University from April 2007 to September 2014 were studied through retrospective analysis. According to the performance of artificial pneumothorax prior to medical thoracoscopy, the pleural space adhesions and the pleural effusions, patients were grouped into artificial pneumothorax group (107 cases) and non-artificial pneumothorax group (45 cases), adhesion group (102 cases) and non-adhesion group (50 cases), and few or no pleural effusion group (94 cases) and massive pleural effusion group (58 cases), respectively. The incidence of complications such as subcutaneous emphysema, pleural reaction, infection, aeroembolism and pulmonary injury/hemorrhage in different groups were compared, and the vital signs of patients were observed. Results were compared using the Chi square test. Results: After thoracoscopic examination, the definite diagnosis rates of artificial pneumothorax group and non- artificial pneumothorax group were 83.2% (89/107) and 93.3% (42/45) respectively, which showed no significant difference (χ(2)=2.744, P=0.098). Three cases of subcutaneous emphysema occurred in the artificial pneumothorax group, while all these 3 cases belonged to adhesion group, and one of them belonged to few or no pleural effusion group, and 2 of them belonged to massive pleural effusion group. No subcutaneous emphysema cases were observed in the non-adhesion group. In the non-artificial pneumothorax group, one case of lung trauma caused by trocar was observed, which belonged to adhesion group and few or no pleural effusion group; no lung puncture wound cases were observed in massive pleural effusion group and non-adhesion group. Other complications related to artificial pneumothorax and thoracoscopy, such as pleural reaction, infection, air embolism and pulmonary injury/hemorrhage, were not observed. No significant changes were found between the vital signs of patients before and after artificial pneumothorax. Conclusion: For pleural effusion or pleural disease patients with pleural space adhesion, the performance of artificial pneumothorax prior to operation was recommended. Artificial pneumothorax was not recommended for patients without pleural space adhesions.