Partial Pressure of Oxygen Control Method in Identification of Intersegmental Plane

The start time was defined as the end of the surgical side lung having completely re-expanded. The end point was identified as the point at which the preserved lung was fully deflated, and a boundary had formed between the targeted lung tissue and the reserved lung.

The lung collapse score was referenced and improved by the Bussiers method using descriptive and visual features that included the context of lung collapse, space in the thermal cavity, atelectasis, color of the lung (healthy lungs are a pink gray/simple color), and where the collapse was considered satisfactory.Lung collapse was defined on a 4-point scale, where 1 point int=no lung collapse, 2 point=less partial lung collapse, 3 point=major partial lung collapse, 4 point=total lung collapse Each video clip was assessed by 2 evaluators。 Independently evaluate the level, and resolve differences through consensus through negotiation.

The total time from the start of skin incision to the completion of chest closure

Blood gas analysis measuring before entry, after one lung ventilation (SpO2 maintained at 95%), after pure oxygen lung stimulation, and at 3 and 6 minutes after pure oxygen lung expand.

Intraoperative bleeding volume: Use a suction device and a graduated collection device to collect intraoperative bleeding volume in milliliters, accurate to ten digits. (An average of 50ml)

Postoperative drainage volume: The total drainage volume in the drainage bottle during the retention of the thoracic catheter after surgery, in milliliters. (An average of 200ml)

Postoperative complication incidence: Record the name of the complication and classify it according to the Clavien Indo classification system

The number of days between the surgical date and the discharge date;

Total hospitalization cost: The total cost of patients from admission to discharge, settled in ChiNaYuan（CNY） (before medical insurance settlement).