In 6 cases of thoracic surgery: Mean age: 62 ± 8, total operating time: 178 ± 28 minutes, tumor site: upper lobe of right lung: 4 cases, upper lobe of left lung: 1 case (hamartoma), tumor of posterior mediastinum: 1 case (GIST), total operating time: 178 ± 28 minutes, mean postop hospital stay: 10 ± 2 days.