Pulmonary Watershed Topographic Map Navigation for Lung Nodule Resection

• This technology can replace part of CT puncture-guided positioning, which not only saves CT positioning costs for patients, but also saves time and space resources in CT room;
• The target artery occlusion technique does not cut off the blood vessels, and the operation is still a wedge resection. Compared with the standard segmentectomy/subsegmentectomy, the steps of cutting off the veins and bronchial tubes are reduced, the operation time is shortened, and the turnover rate is improved.
• There is less damage to the lung tissue, and the lung function is well preserved. The patients can be discharged in an average of 3 days after the operation, which improves the bed turnover efficiency of the department.

Inclusion criteria

• <1cm CTR≤0.75; <1.5cm CTR≤0.5; <2cm CTR≤0.25 Lung nodules
• The tumor center is located in the peripheral 2/3 area of the lung field
• Preoperative analysis and planning of watershed by 3D reconstruction
• Clinically assessed as cT1aN0M0 stage IA1/cT1bN0M0 stage IA2 (eighth edition), clinically resectable

Exclusion criteria

• No surgical video, no postoperative gross specimen and related distance measurement records
• The incision edge does not exceed the target nodule diameter from the nodule edge
• The resection range exceeds 50% of the preoperative planning
• Postoperative pathological staging non-pT1aN0M0 IA1 stage/pT1bN0M0 IA2 stage (eighth edition)
• Any situation where the investigator feels the need for extended resection
• Patients with chronic diseases (such as COPD, pulmonary fibrosis, silicosis) that can cause loss of lung function in patients at risk of progression or potential progression