Dye vs. air: which better guides lung cancer surgery?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Aged 18 to 80 years old; 2. According to the surgical standards of the Eighth edition of People's Medical Publishing House, patients whose blood pressure was under 160/100mmHg and blood glucose was under 5.6-11.2mmol /L with normal functions of major organs such as heart, lung, liver and kidney before surgery are included. The main criteria are as follows: i. Cardiac function examination indicated Goldman index grade 1-2; ii. Pulmonary function examination suggested postoperative predicted FEV1≥40% and DLCO≥40%; iii. Total bilirubin ≤1.5 times the upper limit of normal; iv. Alanine aminotransferase and aspartate aminotransferase ≤2.5 times the upper limit of normal value; v. Creatinine ≤1.25 times the upper limit of normal value and creatinine clearance ≥60ml/min; 3. The center of the lesion is located in the other lobes except the middle lobe, and in the middle and outer third of the lung; 4. The maximum diameter of the tumor was not more than 2cm on TLC(Thin layer CT) scan and the clinical stage was cT1a-1bN0M0(according to AJCC staging criteria, eighth edition); 5. Consolidation tumor rate \<1； 6. ECOG PSscore 0-1; 7. All relevant examinations should be completed within 28 days before surgery; 8. Patients who understand the study and have signed informed consent. Exclusion Criteria: 1. Patient with a history of iodine or indocyanine green allergy; 2. Patient who had received antitumor therapy (radiotherapy, chemotherapy, targeted therapy, immunotherapy) prior to surgery; 3. Patient with a history of other malignancies; 4. Patient with secondary primary cancer at enrollment; 5. Small cell lung cancer; 6. Prior history of unilateral thoracotomy; 7. Woman in pregnant or breastfeeding period; 8. Patient with interstitial pneumonia, pulmonary fibrosis or severe emphysema; 9. An active bacterial or fungal infection that is difficult to control; 10. Severe mental illness; 11. History of severe heart disease , heart failure , myocardial infarction or angina pectoris within the last 6 months; 12. patient that researcher considers inappropriate to participate in this study.